How to replace a marine diesel fresh water pump
ฝัง
- เผยแพร่เมื่อ 27 พ.ค. 2022
- This is the second of a two part video, showing how to diagnose and replace a leaking fresh water pump on a Yamnar marine salt water diesel engine (3GM30FC-YEU). In part 1 we removed the old pump and we decalcified the heat exchanger. Today we’ll install the new pump, pressure test the system, and burp the cooling system.
Part 1 is here • How to clean a Yanmar ...
The information contained here is offered in good faith, for free, but with no guarantees as to accuracy or safety. Marine diesel engine repair is inherently dangerous, both from the perspective of personal safety and the risk of misadventure to the engine. If you choose to accept the risk of DIY repair, any misadventure you experience is on you.
Music is “Divider” by Chris Zabriskie, licensed under a Creative Commons Attribution license (creativecommons.org/licenses/...)
Source: chriszabriskie.com/divider/
Artist: chriszabriskie.com/ - ยานยนต์และพาหนะ
![จังหวะนี้ - เม้ก อภิสิทธิ์ [ Official MV ] จอนนี่มิวสิค](http://i.ytimg.com/vi/4gQRZCkRyiU/mqdefault.jpg)
You create some of the best 'how to' videos on TH-cam. You always get straight to it, with no time wasting, plenty of educational info with great methodical techniques, and I've got to say, you've taught this ol' dawg a few tricks as well. Thank you for taking your time to share such valuable info and your techniques with everyone.
Excellent use showing specific torques. Everyone just wants to reassemble without a torque wrench. Good and tight German torque does not work well in a gasket setting.
Immensely informative with measured and articulate delivery without any of the nonsensical breathless nervous hype frequently displayed by the less experienced self promoters . Much obliged , thank you Sir .
I love watching all of your videos. Exactly what I need to know without any bs.
Thank you.
Great video, learned a lot! Thank you!
Dave, I appreciate your videos. I currently have a 1999 vulcan and been following your videos on your 1995 vulcan to perform the maintenance on my bike. I also have a boat and have started following your marine videos. Thank you for your teaching.
Wow, it's nice to meet somebody who has an interest in both topics. Thanks for the feedback!
What a great video! Thanks so much for explaining the details of the fresh water system and pump replacement so succinctly.
Most excellent, thank you again!
-Respectfully
Thank you!
Hi Dave! It's been a few weeks since I got any notifications from TH-cam about your channel and sure enough, you had a couple of videos I hadn't seen. You did a really great job on the water pump giving your viewers a look inside of it, how it works and an excellent step-by-step disassembly and reassembly of the pump. Have a great Sunday Dave and best wishes to you and your family! 👍
You too, Terry. The cool thing about working in related fields is the way experience gained in one arena is applicable in many others. It wasn't much of a leap to shift to these intriguing little marine diesel engines. Happy Fathers day!
@@spelunkerd For sure Dave knowing similar systems makes it easier when going to others. And a Happy Father’s Day too you also.
Learnt a lot from you Dave. I have a 3HM35F on my 1990 Island Packet 35 need to change oil and coolant.- Great videos! Thank you.
Great video 👍
Great video I found it really useful and informative as I address my own Yanmar engine.
Great videos! I have recently bought a wooden boat with a yanmar 2qm15 engine. I'm not a good mechanic but I'm not hopeless. Diesel engines are how ever new to me and your videos help a lot. Very informative and pedagogical
Great video series. Very helpful to learn how the cooling in my Yanmar functions.
Another great video. :)
I use Loctite thread lock. It comes in a small bottle with a cap so it doesn't dry out. Also, it doesn't require a lot of it.
Nice video
Great video. Clear and very useful. Thanks from Greece
Thanks for the feedback, it's fun to see people from all around the world. Greece has amazing nautical history, a truly wonderful place to visit.
Such a great and useful video. Thank you.
What a kind remark, thank you.
lovely!
Great step by step share ! ENJOYED..
Thanks, Shawn!
Yeah, you earned my like today!
As Always a really good video thats is well explained and through. Sail Safe mate. Ant & Cid
Thanks, man!
In the official Yanmar repair manual, as is typical of old style repair guidelines, torque specs are not emphasized. In that era we went with experience and instinct, except with head gaskets. I was able to find reference on page 8-5 to a torque of 2.89-5.79 ft-lbs for the pump setting bolts, which had me confused since that is much lower than we typically use for a water pump. I think that spec is wrong! During the video, you saw me make a big fat guess to do a second round at 10 ft-lbs, and a third round at 15 ft-lbs. The one smaller bolt holding pump to bracket was done without a torque wrench but was not so tight. After a thoughtful remark by a viewer below, I looked the spec up in the Clymer manual for Yanmar marine diesel engines. On page 182 they quote a torque spec for the freshwater pump at 20-25 N-m, which works out to 14.75-18.4 ft-lbs. So, if you believe Clymer, my instinctive decision based on past experience to use 15 was right on the money. It's still early but so far there is no issue and I'm confident we've accomplished the task.
Cool
You are way smarter than I am. I watched this 3 times. Great stuff! I’m assuming there’s no scan tool or service data for Yan mar.
Thanks for the kind words. I don't feel very smart, I am humbled literally every day. I have had many misadventures through the decades, all of which were learning experiences. Regarding scan tools, you're right. No oxygen sensors, no cam or crank sensors, and no computer, so no help from scan tools. Not even glow plugs. The fuel injector timing is entirely mechanical, adjusted with shims. These old engines are elegantly simple.
My Favorite TH-cam Channel! You probably don't like to bring too much attention towards yourself but could you talk a little about your education and how you aproach the technical tasks.? Thank you.
What a kind remark, thank you. As a kid I worked as a welder at a few fabrication shops. I started Uni in engineering, switching to a career in internal medicine. Now in retirement I have drifted back to car repair and engineering. Where are you from?
Thanks for replying I'm from the Rio Grande Valley. Deep south Texas.
I wouldn't worry about the bolts breaking as I would about the threads in the block stripping.
Excellent point. These days with aluminum blocks becoming the norm, manufacturers are pushing tolerances and as you say the weak point is the aluminum threads. They also publish carefully researched torque limits. And in this old cast iron block the same will hold true, the threads will fail first. Even so, the torque I used here is pretty typical of that used for old style water pumps so I felt confident to move forward in the interest of preventing a leak. Judging from the corrosion on one of the bolts, I think this pump had gasket seepage in the past.
Looks like an aftermarket oil pressure sender. Did you have to use an adapter because of the British pipe thread, and did you add an pressure gauge or stick with the buzzer?
I agree. It was like that when I bought the boat, I have no idea how they put it together. There is an analog gauge on the dash, and its movement suggest it is not a simple idiot light.
Thats a fast response! So, Yanmar equipped these 3gm engines with a buzzer that sounds as soon as the key is turned, signaling low or no pressure. Once oil pressure reaches the desired level after starting, the buzzer turns off. Well, many people didnt care for the buzzer, and not having an oil pressure gauge. So, they bought a gauge, perhaps a teleflex, but then discovered it was incompatible with the stock yanmar oil pressure sensor. Wrong impedance, or such. That calls for a compatible sensor, but, the thread is wrong because its a US made product. Now, some people tapped the existing sensor port and converted it to American tapered thread. Its pretty close between the two thread patterns, but I am too chicken 🐥 to do that to mine. Finding a ⅛ inch NPT to BSPT adapter is a little difficult, plus the size difference between the tiny Yanmar vs the Sierra sensor is another hurdle. My engine box is smaller than yours, also.
@@wallacegrommet9343 Mine still whistles until the engine fires up, so both the sensor and the analog gauge work together. That's good to know about the compatibility issue. Perhaps the guys who worked on my boat sourced a metric fitting, I don't know.
Hi Dave! I have a problem with my Yanmar 3gm30F. The stuffing box (packing gland) is leaking and I am very worried about flooding of the boat. How do I get my hands in there? There is a muffler over the nut which has to be turned. I cannot even measure what size of wrench do I need. And when I tried to turn the nut a little, it started to drip more. Please explain how you deal with the problem in your engine? What size of wrench is needed? Thanks, Gennady
As common as stuffing boxes are, I have very little personal experience with them, and none that would be of value to a person looking for help. This boat has a sail drive. Sorry I can't help!
I’m having the same problem. Did you find a solution?
@@el_sweetime yes. I found a mechanic. For 300 bucks - 3 hours of labor - he fixed this and other problems. Cheers. Then I added an automatic and manual pumps to the bilge.
@@tomjoad1060 cool thanks man
Im going to tackle this project with a neighboring cruiser.
All hoses should have double hose clamps.
That's a valid point, for an ocean going boat it wold be wise to follow that guideline. I simply replaced what was there but two would be more secure. After this video was done I had a pinhole leak where the hose leading from the potable water heat exchanger meets the pump, and I redid that connection with two clamps.
Worlds most expensive water pump
Yeah, the OEM pump is expensive, especially if you buy it with the thermostat and bracket as a unit. The unit I installed in the video is an aftermarket "Friday Part" water pump through Amazon for about $140 Canadian, and I reused the thermostat housing. If you buy the Yanmar pump complete with the bracket and thermostat housing, then I believe you don't need to fiddle with the seal between the two. I can see why some professionals would prefer the OEM pump and bracket, because there is a little less labor to deal with two sealing surfaces. In my case it was relatively inexpensive and simple to replace, and the repair worked perfectly.
Ya know, I'm not sure whether I like learning about small marine diesel engines better than I like to sail the boat they are in. I was born a sailor but I'm transitioning into being a diesel lover. Will I be Ok? What will my friends say. They are right-wing sailors.
Ha ha, I do understand what you're saying. In our club, many excellent sailors have gone over to the 'dark' side of comfortable cruising, short handed sightseeing, and exploring areas inside the minimum depth limits of my 7' keel. On our last cruise, one of the fuel dock attendants had never seen an extendable bow spirit like mine. And we certainly envied those with more than a tiny dodger when it was pouring rain. Often we cruise as a team and it's great to have a breadth of equipment you get from many different boats. At night, most congregated in the bigger boats for fun and games. Even so, almost everybody had some kind of diesel engine. In the marina, the ones I find annoying are the bulky cats, they take too much space.