The Cat C7 Engine. Facts, Walk Around, Sensor Locations, and Maintenance. Know Your Engine.
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- เผยแพร่เมื่อ 30 ก.ค. 2024
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The Cat C7 engine is one of the most common small truck, bus, and motorhome Diesel engines out there. This video talks about the components, component locations, the common failures, and maintenance topics of this engine. @AdeptApe on Venmo or AdeptApe@yahoo.com on PayPal for donations, thank you so much for supporting the channel! - ยานยนต์และพาหนะ
Thank you!
25 years as a general automotive mech with a bent towards Euro imports, I had just enough diesel info to keep a VW truck or MB wagon running ;)
NOW due to some inherited family issues, I am the proud(?) owner of a 2006 C7 in a box truck with 200K on the clock. Two hours of watching your vids, I have learned more than than I have been able to find in three weeks!
As a certain actor sed: "I'll be back!"
Thanx again!
As a certain governor said *"screw your freedom"* lol
@@randygonzalez6250 that former governor really should've retired after his acting career started declining, as much as i admire him for his bodybuilding and his acting, his politics are beyond me
Thanks for all you do for the wrench turners. I am a mechanic for morbark and I used your videos for reference for CAT engine service in our shop. Unfortunately, we just do fluids and basic stuff to engines, we dont have the time or manpower to do full fledged engine work. Thanks again man!
I'm a maint tech for a deere dealership. We see many trucks on the hook. Friday it was the fish hatchery crew, so it's great to have fact based insight toward their problem.Thanks for posting. M.
Learned a lot from your videos I'm a mechanic in the army and we use 3126 and c7 on strikers and are always having problems
Thank you! I’m going to look at a school bus tomorrow with a C7. This taught me so much.
Love your content and how thorough you are yet speaking to a basic level of knowledge! Please keep the vids coming! I collect busses and you have saved me a lot of time!
I'm not even a diesel guy, but man you make some really great content!
+998 Squid Thanks for watching the videos, I try to make them professional as a guy talking into a camera about engines can be.
Adept Ape They are professional! But don't let your inner creativity go to waste either!
All the videos are helpfull
This is great. Thank you so much!
Love the info, keep it coming
i really missed you bro! cheers from Mexico! God Bless You!
I am working on a C7 on a bus and I am getting a active and inactive injector mechanical no response code. Does that call for a injector replacement right off the bat? or should I do the fuel verification test? and other tests that you may recommend???? any and all help that you can give would be greatly appreciated
I just had one of the brass/copper bushings go on one of my 05 C7's in a dumptruck. Took out the camshaft too as you mentioned. Curious to get your opinion on what would cause this to happen. Is this something that wears and weakens over time or can it just happen from abusive driving? Hard downshifting, lack of oil? This truck gets driven by several different people and wondering if I need to put more time into training my drivers. Your videos are great; thanks for sharing!
can you help me I have a CAT engine that will not start in warm weather unless you plug the block heaters in but in the cooler weather it will start without the block heaters plugged in wondering if anybody can tell me what may be wrong with this thing no mechanics around here can figure it out
I enjoy all your videos and I want to thank you for for sharing your knowledge you make everything clear and I thank you again and take care and God bless
This video is extremely informative and helpful to navigate around your c7. Great video.
I find your videos very helpful for my understanding, I myself am an apprentice with Hastings Deering Cat® from Papua new guinea in the pacific. But we come under an Australian region dealership. Im glad to know you make these sorts of videos. Please continue the great videos , really is good stuff.
Saw one of these in a buddies shop in CO, man oh man would I love to swap this into a pickup.
+Michael Ray They are simple engine that can get a lot of torque (860 ft lbs) but are quite expensive.
Hi josh, I have 2005 cat c7 in Kenworth t300 with allison automatic transmission. The engine runs good however every time Iam fully stopped in gear, my engine rpm fluctuates between 700-800 rpm. Any Help Would be really appreciated. Thanks
Hello sir I have a c7 in my bucket truck today it would not start after showing up to a job it cranks and everything like normal we sprayed a little starting fluid and it fired right up and ran like normal no issues just doesnt start on it's own idk if you may know what the problem is any help is greatly appreciated
Thanks for the info,
I am committed to a purchase of a 2008 Ford 650 and to my surprise it has a CAT engine. This info was not shared with me online, before I took the hour long drive to lay eyes on the truck. That reason was! the dealership does not have the authority to sale a commercial vehicles, I assume insurance or some other governing in there industry, however I test drove the truck and it ran fine although it seems to have an automatic engine break whenever I let off the accelerator the engine would slow itself down. But it is a beast of a truck! This is what brings me here. It is a AS IS! sale and there mechanics have no clue about this truck and they normally offer an inspection /diagnosis IN HOUSE. and Like you would imagine things got all slippery during the closing stages of the sale and I felt like I may be getting screwed. asking price $ 25,597. I got them to $24,497. Whata re the first things I should do with this truck to insure it's road worthy and I made a good purchase???
Keep coming back to your channel for more!!
I have a question
Got a c7 in my Sterling flatbed, power steering fluid god dumped out on the way back from a 30 mile drive. Pouring out of the reservoir itself. Can’t find any leaks, I put some pressure (10psi) to the reservoir itself to see if any vacuum hoses would leak but still nothing.
It has the hydra boost brake booster so the brakes are tied into the power steering system.
When I turn the steering wheel (with front end jacked up) left, the fluid level goes down, then turn right and it goes up in the reservoir. What makes it super pressurized is when I hit the brake pedal, almost instantly it’ll fill the reservoir and piss out of the cap. Thought the PS filter was clogged, changed it out and still pouring fluid.
I have 3 things that are pretty pricey that I could replace:
Power steering pump on the engine
Brake booster on the truck
Or steering gear.
I’ve been doing some reading and apparently all of my symptoms point to the power steering pump itself. I’m planning on going to the CAT dealer in the morning but just wanted a second opinion.
Thanks for all of the videos man
I literally chop veggies/bbq to them when I make food lol even the ones that don’t directly apply to me I call it “learning ahead”
adept . I have a 3126 rv engine that has flodded the oil pan with diesel and rand for 1 hour. should entire engine be rebuilt due to dilution? it has pretty good blow by
I know this is an old video but after my oil change I started the truck up which is a 2003 peterbilt 330 with the cat motor and the stop engine light and the check engine light (Flashing) came on. I put 4 gallons and 1 quart in the truck (someone had 17 quarts written on it for the oil capacity). Would you by any chance know what would be causing this issue. Apparently the truck hasn't had an oil change in a long while also.
I'm having problems locating My injection actually pressure sensor, I'm trying to install it on a cat C7 engine could you help me
Love your video's, I've watch these when i had a 3126 and I'm back because i believe i have a C7 in my 2006 Tiffen 40 ft motorhome. last week it was on it's way to Alabama from Philly PA, ran like a champ down the the Virginia North Carolina border and then it went bad. I wasn't there, a buddy of mine had it, he said it started blowing some black smoke, had a small vibration and then shut down, would crank and is now in a yard in NC. After watching your video i'm curious if the high pressure oil system could lock things up without really damaging the lower portion of the motor. I'm feeling like this is a blown motor but i am very limited on my diesel knowledge, if it was a gas motor i would know a little more, but i'm looking for some very educated info. My 2nd question would be, if this is a blown motor and i need to replace this do i have to replace it with a C7 or could i put another Cat motor in there instead. I really appreciate any help or advise you might have because I have to fix this, the motorhome is very nice with the exception on this issue.
Good in-depth video adept!
+aaronw1996 Thank you.
A couple of the oldest trucks in our fleet have these engines, and I just starting pulling an air compressor on one of them. Never really done this big of a job (at least in the engine bay) so wish me luck.
Great stuff. Thank you.
So I have a 3126 in my class A RV and noticed that there is an electrical line that comes out of the block and plugs into a 120V outlet. What is that for? If I leave it plugged in it trips my GFCI outlet as it is on its load path.
Thanks in advance.
I have a 2008 f650 with a cat c7s engine that will not manually regen, the cat dealership says it's the ard head, but my question is could it be the fuel supply going to the ard head. When it starts the manual regen it will try for a few minutes before it fails. There is an ard after treatment nozzle that was corroded and it fell off when checking it. Would it make sense that the other lines could be plugged or corroded and not allowing the regen process to complete?
I have a 3126B on my F-350 truck, I replace the inyectors seals because I have oil into the fuel system and after I replace the seals it still passing oil, should I have to replace inyectors cups? What is the chance to have a head crack on this engines?
I have a c7 in my Freightliner and it died on me while I was stopped at a red light. The mechanic first said the cam/timing sensor was bad. They replaced the sensors and it still cranks but wont start. Same issue. Now they are telling me the ECM is bad, I just had a new ECM installed on 11-30-17. Does this sound right?
Looking at 03 Chevy 6500 with the c7..was told the motor was rebuilt at some point...truck has 218k miles I believe or 280k. But with rebuild, 100k miles...there is oil in the coolant but there isn't any coolant in oil. What do you think? Possible cooler, cracked head somewhere?
Great Video--
Sir I have questions? C7 caterpillar engine Tamrock drill ranger 800.. new engine overhaul already.. when coolant temperature getting 150f the coolant coming out to radiator reservoir line why is like that? Thanks
Is it safe to buy a 2007 pete 330 with 300k miles with c7 , its a flatbed tow truck. Thanks
Any chance you could tell why I'd be getting a code 102 07-13 turbo waste gate issue. We applied air pressure to the waste gate and it open and closed. What else should we look for? FYI, I'm getting a buzzer and stop engine and check engine lights when pushing done on the accelerator. 2005 Cat C7 in a Itasca Meridien.
I am thinking that in the last two years of C7 production, the engine received a common rail type injection system. Is this correct and does that mean that it no longer used any of the HEUI hardware? And is this a better system?
Great Video's! I just bought a 2003 Peterbilt 330 SA dump truck with a Cat 3126B. My Water Temp gauge on the pannel does not work but my ECM see the water temp. Do they have more than one water temp sensor on the engine? One for Gauge and one for ECM?
Question about the c7. I have a cat 963c track loader that has the c7 in it. It has very nicely landed a present in my lap by presenting itself a valve drop....... My question to you is can I use cylinder heads and blocks off on-highway applications by just switching over all the stuff? New heads are almost non-existent and the ones I did find are around 5k Any information on using the block and head from an on-highway application to an off-highway application would be greatly appreciated
Are there people in the marketplace offering reprograming of the C7 ECM, aside from Caterpillar. For deleting certain engine components, for example.
Thanks for the info very help full
Are the injector supposed to pool around the base of the injectors we are suspecting a leak on 3 of the injectors but they aren’t spraying out
all valuable information.......does the C7 have the plastic plugs to keep the gudgeon pin in?.....and is it possible to read error codes without a Cat laptop?
Does anyone know how to locate the inlet for the glow plugs? I can't find the cable, or even the harness to plug a new one into
I am having starting problems with a 3208 CAT, starting with easy start but not on it's own, trying to find glow plugs or heating element but can't see them anywhere, DOES IT HAVE THEM ?
93-1 got a fuel pressure voltage high which indicates an open circuit. Well your video guided me to the back which has a fuel pressure sensor on the left side of the regulator that was unplugged.
Did the BAE military JLTVs in the 2007 to 9 range get the screwy C7 with the S or were they the good old fashioned ones? It's says they were 2007 EPA compliant. Would hope with their multifuel requirement the defense department would get the engines without the emissions noose. Been web searching and I'm not smart enough to find it.
Thank you for the video.
Can you please tell me where the engine block heater port is located on the C7?
This is fantastic!!! Thank you so much for this info. I have a cat year 2000 3126 and it runs great. I'm looking at a 2005 C7. I've seen this video and is there anyway in inspecting the truck with c7 to see if there are any HEUI problems? Hard cold start, smoke? What can I look for that could be a deal breaker onsite with no tools really? Truck has 150,000.
+n9878f Without a way to communicate with the engine, the best way would be start it when it's cold, look for any stumbling or surging, then run it at different rpms up to operating temperature. You should have them take it to a Dealer that could plug into it and pull any diagnostic codes if there are any. Usually they won't charge anything just to pull codes.
I have a really dumb question. I just got a new service truck with a cat c7 never worked on a c7 before and have no idea about them and the whole huei pumps and all but do they have a fuel temp sensor and if so what’s the location.
I have a 3126 that has a air intake heater. The relay feeding power to the preheater is good. What tells the relay to turn on. It's in a 1998 chevy truck
The info is correct keep coming
Could a Jacob brake work on a c7 would love to know please
C7 in a cat 324D Excavator, I have a oil leak, it looks to be coming from behind the engine computer, looks like some sort of inspection plate? Maybe for the push rods? Are those known to leak? I need to remove the computer to really see whats going on, but im kinda just look for some input, or is there something else that might be leaking that im not seeing with computer in place? Engine has 12k hrs on it.
So I was told today that a bad oil pressure gauge gives the same fault as a bad heui pump. I was told to get another gauge and connect it inline with the old and see if they differ. That, that would tell me if I had a gauge failure opposed to a pump failure. What are your thoughts???? A gauge is definitely a lot cheaper than a pump!
Hey i have a c7 in a school bus. I have low indicated oil pressure, but the oil level is good. Should i change the oil to see if the oil is just old?
You are the first person I've seen that has had some relevant information on issues I have at work. I'm a heavy equipment tech at a small city landfill, and we are having a crank no start issue with a C7/3126(?) water truck. Fabik says everything electronic is OK, but when I get the engine to run for 20 or so seconds on either, the tach doesn't move. To make things more confusing, the fuel I pulled from the tank is blue green, and opaque enough that I can't see the sun through a pint jar. What would be your start point to get this truck back up?
Hi Sir,l have a question regarding to a C7 engine,my friend is selling me truck that has this C7,apparently is loosing oil true the blow pipe,trucks runs but has that problem,can l put a 3126 and replace the C7.?or is not possible? Appreciate your response,thank you !
From my understand c7 basically is the same as a 3126 just the c7 is a little more updated when it comes to electronics
Good knowledge your sharing.
wow good vid makes me really interested i seeing and looking for a c7 i did know about the cat painted perkins because i have a few
+Eric Lakota Glad the video was helpful to you.
Thank you for your great and helfull information Sir
I have 05 freightliner with car c7 I been getting barometric code what do I need to do?
I'm doing a new exhaust seat number 5 cylinder. For some reason to drop the valve seat. Chewed up the top of the piston a few scratches in the cylinder. Trying to locate maybe a oversized piston for that cylinder. Does anybody know if they sell oversize Pistons?
I have an oil leak Coming from the intake side, front corner... it doesn’t leak at idle. I cannot locate it. Any suggestions?
Does this apply to the modern 2020 C7 Cat engine that comes in a 330 Cat excavator
Does the turbo need to come to change the oil cooler on the C7 ?
I had the fan hub assembly seize while driving through AZ. The belt shredded and the fan fell off. I was lucky it didn't also destroy my year old radiator and CAC, but it still cost almost $3K when it was all done.
I'm not sure where I should as this question. I bought a military truck with a CAT 3116. The state/age of the fuel in the tank is unknown. Would you put any additives in the tank to ensure there are no algae or other issues ? Also, what do you think of DieselKleen diesel additive? Thanks!
+urgentcareguy3 I'm not familiar with that brand, but it's probably a biocide for black algae. Best is to dump the old fuel change the filters and then run the engine a good long trip. The fuel gets pretty hot on a long run so it will kill most stuff in the system, then change the filters again.
Hey partner. I'm sorry to bother you. But I have a question for you about my bus. So I have a 2006 Thomas Freightliner School Bus that I'm converting to a motorhome Right now.I have the bus up north in Michigan. Camping Today I went to get propane About 20 miles away And on the way home It stop running I was going about 50 miles an hour And the bus just started to idle. It would not let me give it gas with the accelerator. I pulled over And it stalled I waited a couple minutes And it started right back up. Oil pressure is about 35. PSI coolant temperature Was 180. No smoke out the back of the engine. And it seems to start up and run just fine now. Any idea what that could be? Thank you.
thanks for the video
i might have missed it in the video, but what motor oil does the c7 like to use? i assume Rotella is popular, but t4 mineral oil, or t5/t6 synthetic? i'm working on a 2007 freightliner rv style medium-duty truck with like 100k miles
+daft nord You can use 15w40 or 10W30 depending on the temperature range the engine operates in. I'm not a Shell or Rotella guy, either one is fine. Synthetic is best of course, but very expensive.
Other then injectors leaking fuel, have you experienced any other failures with the head or pump leaking fuel?
Looking at a truck, but it has fuel in the oil. Betting its an injector. (Well hoping, don't know)
You got a part number for that fuel regulator? For a 3406 c7? Can't find it on cat sis
My formans friend got a truck that cranks but wont start. Said the manual fuel priming pump won't get hard. Don't have the serial number, got a rando one online to try and use cat sis but can't find it. Thanks!
When the C7 is warmed up and you have been running for 60 mins, what is the normal idle oil pressure at a stop light?
Do you know where I can get the metal formed heater hoses? I have a 2007 sterling L8500.
I have a rear engine bluebird, c7. What oil should I use on this engine. Am I reading it correctly, I'm pretty sure it said 10W30..?? All the videos I see guys are using 15W40..help!!!
Thanks, good information 👍🏻👍🏻😎😎
Awesome Videos, valuable information.
Quick Question. Can I program an ECM by copying the files off another ECM with same cat C15 engine, first 3 digits of serial #
are the same SDP , only difference is o.ne has an Ultrashift Transmission and the other is a manual transmission.
+Moytech Yes you can, it's called copy configuration in ET. You would still have to program the injectors, serial number, and whatever parameters are different such as the transmission.
Around my GMC 7500 K to the scanner and he said he had a high oil pressure voltage hi that’s what he has said on the sensor so but I don’t know what’s wrong with you can you recommend something in the video or tell me what to do or where the sensor is located at the video but I can’t
Nice information
Love the videos, currently going to community college in Oregon learning diesel mechanics. On to my 2nd term. Thanks for the tips. My school has a partnership with snap-on where if you are a student you get about 50% off on all their tools for the 2 years you are in the program. Time to stock up on tools haha
+Nathan Moulder I used to have that discount too with Snap On and Matco, I was sad when it ran out.
Adept Ape
Yeah im gonna be spending most of my money on them while I can honestly haha
Will this engine work well on a 2008 freightliner m2? What would you advise?
What happens if it's blowing white smoke when I push the gas pedal to drive or when I'm driving
1:15 if the fuel pressure regulator went bad would that cause an injector skip?
I've been chasing an injector skip on cylinder 1 for a while now in my 2008 ford f650 tow truck
I would just change that fuel pressure regulator and check the fittings on your injectors
I had removed a hose to do some work and lost some coolant and am wanting to top back off which type of coolant do I need? C7s
+Timothy Nichols Cat recommends their Red ELC coolant, it is compatible with all Cat engines I believe.
nice one. keep it coming. 😃
+venkat sundar Thank you.
News to you, I work in a Caterpillar engine plant and Cat makes the Perkins engines. And we make a lot of them.
Good evening friend Adept, I have a query for you regarding a CAT C7. There is some way to lower fuel consumption in one of these engines is the only CAT C7 of the fleet the others are Cummins ISB but are more economical when it comes to fuel expenditure. My question in particular is if you can do something with CAT ET to decrease fuel expenditure.
In advance thanks and blessings
+José Antonio Díaz Serpas Hmmmmm well, the only thing in ET that would affect fuel consumption is horsepower. You could rerate the engine for less horsepower, but other than that it would be make it more aerodynamic or drive slower to save fuel.
I've got a 2006 f750 with the c7 in it. I'm leaking power steering fluid and breaking is stiffening up. Do you think I can refill the fluid reservoir and get my truck to a shop 15 miles away?
+MrHorhell Depends on how bad the leak is, as long as you can keep fluid in it you should be able to make it, but if you are losing brakes it is safest to have it towed or fixed.
I'd like to put a Cat in a old 1 ton Ford truck. Would the C7 be a good swop?
I havent seen anyone do it i have seen people use a 3126 but the c7 and 3126 are very similar so idk why not
Where is the fuse that controls the alternator because my new alternator won't charge. I have a 2004 GMC C7500
Is the 2004 Huey pump C7 block the same as the high pressure 2008 common rail C7
Ive got a GMC C7 moving truck broken down in Columbus OH. Looking for a reliable and honest mechanic... Any direction or assistance would be greatly appreciated.
Just bought a bus with the c7. Acts sluggish around 65 mph. What’s the best way to get ahold of you?
l have watched all your videos thus far. l always do my own work but these units are more technical. Could you do one on replacing a heiu pump that was spread metal to injectors and fuel rail. How to clean fuel rail and injector area.
Just came across your video, very helpful
We were supposed to buy a RV that was advertised to have a 300 hp Cummins but found out it had the 350hp C7.
Should we pass on this MH because of the C7?
If huie system can get damaged so easily, can I add an inline oil filter before the huie pump?
I remember you mentioning in a different video about the oil cooler failing and filtered oil can get contaminated with dirty oil! If I would add an inline oil filter would help not damaging the huie pump?
+Sebi Alex Check out the bulletproof C7 video. It'll talk about that.
What is your opinion on propane injection kits for additional power.
I am looking at purchasing a 2007 F750 with a 7.2 liter C7 Is that the early or the late serial number?