305 Engine Build#1
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- เผยแพร่เมื่อ 7 มี.ค. 2022
- We begin the engine build for the 305. This engine was seized , (see previous two teardown video's) torn down and sent to the machine shop. The engine has been machined and will be assembled in a series of videos which will include installation and run in. As we assemble the engine the transmission will be rebuilt and the car will arrive in the near future
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I drove an ‘85 Firebird with a 305 like a pickup throughout the mountain west - where no Firebird was meant to go. Changed the fluids to spec. Still purrs at 350K. Most reliable motor I’ve owned.
Some were truly exceptional! Thanks for watching!!
I had a ‘68 Firebird with a 389 (from GTO) and highjacker shocks in the back and used to take it to the mountains and rip through the fire access roads drifting, before the drifting was a thing. Thats what we get when we’re raised on Dukes of Hazard!!!
Sounds like fun , I have fond memories of those days as well!@@philippine_phin
I have a 305 with 69k miles. Still has the original sparkplugs unfortunately
@@HandMadeWrath That's crazy , Tanks for watching!
Glad there's some people that give the 305 the love it needs.
Thanks , and thanks for watching!
Diesel mechanic here. Great video. I’m building a 305 for a panel van and found this while watching build videos. Very humble and down to Earth; i’ll be watching the rest for sure👍🏽
Thanks for the comment Jake! Good luck with your build and thanks for watching.
*Great video! I too, have been working with engines for decades. Greatest thing in the world. Brake clean is now classified as a pretty heavy carcinagine. I used to get it on my hands and I breathed in the fumes a lot over the years. Stay safe, bro. Nitrile gloves and ventilation help a ton.*
Thanks for the comment and the advice!!
I had a 1982 Blazer with a 305 and t the 700R4. Poor fuel economy, low vacuum, low power which caused shift cycling between D and OD. Not being the HiPo 305 it had smaller valves and larger combustion chambers. I got a TRW cam that was the second up from the stock 350 cam. 204/214 @0.050" and about 0.425" lift. Installed with a double roller timing set. That woke that 305 up and it drove like a dream. That cam was referred to as the RV grind.
I have used that cam many times the last 35+ years! It always worked just fine! Thanks for watching!!
Love it! LG3 305 2bbl, have one in my 1978 Chevy Caprice with a th350, great, dependable cruiser engine 👍
I really appreciate the comment , Thanks Anthony!
Okay, I started my first reassembly of an 305 engine and finished everything you did in your first video. Thanks so much for the great input. I have all the manuals, but its just awesome to see someone do it. Thanks!
Thanks Martin , I appreciate the comments and keep us posted on your progress!
@@jaysgarage3616 One question regarding the completion of the crankshaft assembly: I measured everything and the main journals are not tapered or out of round and the oil clearance is within specs. The crank turn freely and soft, but has a moment in the turn, when it is just a little tighter to turn for a moment. Just a tiny bit. Is that something I should worry about?
@@martinbusker5962 Sometimes when the counter weights are in a certain position it can feel like a tiny bit of drag. Is your thrust (end play) good? If in doubt look at the bearings for any signs of issues.
Knowledgeable and humble, thank you. I’m going to build my 305 and 350
Thanks for the comment , I really appreciate that!! Good luck on your build.
Great content, really enjoyed it 👍
Thanks for sharing with us
Thanks for the reply Bubba!!
You can’t hardly give away a 305 very rare to see someone rebuild one
Hi Sherry , your not wrong. This is my second 305 in 35+ years , the first was a cross fire dual unit. With the high fuel prices and this person not being a performance enthusiast it will be fine and should deliver great mileage!
Kinda seems like your stand has an offset for torquing purpose as when you go to torque it centers it dont wanna be torquing and it offsets and possibly toples over
Great vid, we offset the rear seal to prevent leaks because in the 70s the only sealer we had available was the Indian head sealer. Today’s silicon works a lot better. Lots of rope seals lol.
Thanks for the comment , I remember those seals and stuff now that you mention it. I have not seen a rope seal in many years.
Dude thats something i would do rebuild a motor just to do it
HaHa , Cant just leave it! Thanks for watching!
I still love those old torsion torque wrenches.
I do as well , easy to use , had it tested and it was quite accurate.... that's why it is always out.
That's what my '89 Caprice has. A 305 with the TBI. I see the 305 Chevys are getting a lot of attention like the 350s.
Mileage is usually really good with the 305 and with fuel prices so high people will retain them in certain vehicles/situations. For a daily driver they are great.
Great vids Sir
Thanks Ron!, appreciate the comment!
Do you by chance have a parts list of the new items you installed?
I do not but I do list most if not all of them in the videos. I cant seem to put a list together without needing to do substitutions based on what is available at that moment or what we can get up here within an acceptable time frame.
You are creative O brother
Thanks!
Can you explain the orientation of the camshaft bearings?
Heck yeah
Can I put a 350 on a 66 chevyc10 it’s has a 250
People kill me about being really picky about the bores being clean. A little dust in the bores dont hurt a thing. That said. Neither does making sure they are spotless. and pristine Those things go through so much during operation a little dust isn’t shit. No the bearings and oil passages are total different story.
What is a good street camshaft for a 305? I want a pretty aggressive camshaft.
Never an easy answer , what is it going in?
Stock engine? 4 bbl? , exhaust? Gear? Trans etc. There are so many variables to be considered. If you call a cam company and ask for a recommendation they will ask these and more questions to help choose a cam. Thanks.
Hey I got a question. I have an engine that’s I need to rebuild eventually. I also live in Saskatchewan and was wondering where the best parts store would be to get rebuild kits and such. Thanks
Hi , I don't have a particular shop I deal with in the Regina area. I purchased most of the parts between Summit and Rock Auto and my Machine shop. Thanks for watching
The "929" cam works great in a 305.
It does! Thanks for the comment!
One question regarding measuring the bore diameter. You said it’s not necessary if you trust your machine shop and I had my 305 with 75k miles on it professionally cleaned and honed. Still I wanted to do and learn the complete thing. I used a very high grade micrometer but a low grade bore gauge from Amazon. I get some Out of Round and Taper readings that look not good and are exceeding the limits. My impression is that I don’t get accurate enough readings to really do the math. Would like to get your experience when it comes to measuring the bore with budget equipment. Thanks and greetings from 🇩🇪
It is best to use good bore gauges and be familiar with them , remember it will get bigger at the top of the bore if there is no torque plate bolted to it. If you measure used engines they sometimes look questionable but so do rebuilt items quite often. If you are not sure you could always ask your machine shop as they have seen it and are near you. Are you going to use a cast or moly ring?
@@jaysgarage3616 My idea was to use cast rings. The engine will get into a car that isn’t driving much and is more a show car. I thought the quicker break in time will help.
@@martinbusker5962 Plus cast will seal to almost anything , it would be a good choice!
@@jaysgarage3616 Thanks so much, great to know.
I have a little twin turbo 91 tpi 305 in a 54 cadillac on a modest tune it put down 306/430 at the wheels on the dyno a couple weeks back. I have a couple more tricks I'll be doing to squeak out another 150 horses ish. It's on my channel if you want to check it out.
I am going to check that out! Thanks!
I’m doing the same build Chevy 305 with uem pistons hypereutectic can you tell
Me the ring gap size and if pistons do have side to side movement ? I had all my engine parts done at machine shop bore .030 over and went with Hastings rings 5499 030 parts # and I’m getting out of the box .026 ring gap top and almost same for 2nd
Good Morning , The piston will move and you will be able to rock it. You can look up your piston and see where the measurement is taken for their size and slowly insert into the bore with a .001 feeler gauge and the a .002 and so on and see what your clearance is or take to the machine shop and ask if they could assist you and check the piston to wall.
For the ring end gap , looks like you have the correct rings , how are you installing the ring in the bore? If the ring is not perfectly straight (square) your numbers will be large. If you want to double check if your ring is square in the bore take some calipers and set to.... 1 inch and measure in say 8 spots , whether you are pushing the ring down with the caliper or carefully pulling the ring up make sure it is 1 inch all the way around and check again , if you are slightly tilted it will skew the reading , hope this helps!
@@jaysgarage3616 yeah I have two sets of the same pistons where are used I took one piston and flipped it upside down and tried to insert a .002 filler gauge and it was hard to pull out then tried a .003 it wouldn’t go!
@@jaysgarage3616 I have a piston ring installer tool from total
Seal so there perfect in the bore I had like 13 boxes of Hastings rings everyone of them came out to be on the high side but uem silver-o-lite called for a 40% increase on top ring gap so they said run that gap it’s ok but I’m not sure it’s my first build the machine shop went alittle happy on my bores! I’m coming up with .0004 over the 3.7660 recommended bore size
Hello do u have a part number for that oil pan? Thanks
Hi Rob , it came from Summit Racing , look up summit racing sbc oil pan and pick the right or left side dipstick location that matches your block. Thanks for watching!
If you’re also in Sask like me what machine shop did you take it to?
Accel Engine Rebuilders
I got a question... so I bought an 82 Camaro with a 305 in it with 55K original miles on it. Its not leaking oil at the moment and started everytime. I did have a mech fuel pump fail and the alternator failed. But I was wondering, it really wasnt driven too much and it had been sitting in a garage for the past 17 years. Ran great then and now.. Does anyone think I should just replace all the gaskets in the motor? They are very likely all original. Like I said it did drive and doesnt leak but id have to say or wonder if the gaskets hate themselves right now, should I go for it and replace them or do you guys think it would be alright for the most part? Im trying to determine what I should do before winter comes here in Detroit. Should I just put it all back together and wait til next year? Or you think it would be fine? Probably a dumb question but im just curious what you guys would think?
Hi Chris , this is an answer that can go both ways. If it is not leaking and seems fine I would leave it unless you have plans on pulling it out then I would go through it , I'm sure there are several opinions but that's what I have. Good luck and thanks for watching.
If it's not broken then don't fix it! Old school mentality.
Hello when u clean the block like u did here what did u use? Just brake clean then blow out? I have a 350 im getting ready to put together. Thanks
I use laquer thinner usually and sometimes brake clean.
@@jaysgarage3616 Its just my cam bearings and freeze plugs are already installed , so im just not sure what to do to clean the block now. I cleaned out cylinders already just not sure about the rest of the block .. any help would be great thanks.
@@lordsauto Was it hot tanked , covered? You could use brake clean , compressed air , etc. If it got dirty you could take to a car wash or back to the machine shop and have cleaned. When I remove from the bag I use lint free cloths and lacquer thinner , brake cleen (if covered in wd or anti rust spray)and air. I generally brake clean the outside and use thinner on bearing surfaces , cylinders , etc.
@Jay's Garage ok thanks sir
hey man i wanna see this motor running im following step by step on your build
Good Morning Jacob , I had some phone issues while filming and did not have very good content for the last video. The car has been at home for months and runs really good. I am doing some work to it early spring so I will put a small video together. Thanks for watching.
@@jaysgarage3616 Awesome thanks
What size cam n lift
Stock 350 Cam , bigger than the 305 cam.Cam Type Stock
Exhaust Duration 202
Exhaust Duration at .050 inch Lift 202
Exhaust Lobe Centerline 116
Exhaust Valve Lash Hyd.
Exhaust Valve Lift .273
Exhaust Valve Lift with Factory Rocker Arm Ratio .409
Intake Duration 194
Intake Duration at .050 Inch Lift 194
Intake Lobe Centerline 108
Intake Valve Lash Hyd.
Intake Valve Lift with Factory Rocker Arm Ratio .390
Lifter Type Hyd.
Hi Jay, would you like to rebuild another GM 305 for a fellow TH-cam content creator...? I have a '96 Chevy K1500 which needs her clapped-out 305 rebuilt. Truck still runs, but limited on power. Maybe we could collaborate...?
Hey there , Thank's for the consideration. I am not around much for the next few days but let me think this through for a while. Where are you located?
Is there anything wrong with putting 350 heads on a 305
The combustion chambers are quite a bit larger than the 305 and smaller engines so your low compression engine will be even lower , it will affect both performance and mileage.
@@jaysgarage3616 would I be better off porting and polishing the stock heads? I've got a cam, intake and headers for it.
@@m.w.g4705 That is likely what I would do , it would be a better option.
350 valve will collide with the edge of the block valves are outside of the small bore diameter of the 305
@@tomstulc9143 Wrong. Your standard run of the mill 1.94 valve will clear the 3.74” bore of the 305. People have been doing it for over 40 years.
Question can I put a 350 on a 66 chevyc10 it’s has a 250!engine
These trucks actually came with V-8s so the swap should not be to hard. Look online for some info and or parts for the swap. Good luck with your project!
My motors won’t run without dirt
Haha , they all get dirty.
😂
Seems like a fellow spends his whole life cleaning baked on dirt and oil off the engine, trans, and engine bay.
It does seem that way , it can be a process for sure.
I just think painting a block any other color other than chevrolet orange is just wrong.
Haha , there are many that agree with this! Thanks for watching!