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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel > Yanmar 2GM20F Oil pan leaks
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


Thread: Yanmar 2GM20F Oil pan leaks Reply to Thread
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Topic Review (Newest First)
07-15-2014 02:53 AM
PaulinVictoria
Re: Yanmar 2GM20F Oil pan leaks

Yanmars are quite easy to work on, I managed to replace a whole bunch on my 1GM10 with a set of wrenches/sockets, a shop manual and plenty of swearing.
07-14-2014 06:07 PM
zekingpo
Re: Yanmar 2GM20F Oil pan leaks

He he, I understand.

I've also met the complete range of DIYers and I sailed with my family to the Bahamas and Cuba and back and was able to take care of most of the maintenance I had to take care of. When it was too much for my knowledge, we hired professionals at times and I have no regret looking back (some fixed our haedstay, others aligned our engine).

I am surely interested in learning as much as possible but at the same time, I have no intention of becoming a professional at everything around the boat or if I do, I might change career.

But I sure won't stop sailing until "I know it all" and this is only one extra milestone in this learning process of mine.

Will I do it or not? I haven't made up my mind yet... But I sure appreciate the extra confidence gained with every new project I tackle.

Thanks for the tip ;-)

Quote:
Originally Posted by smurphny View Post
Just my opinion but knowing how to fix your engine and having aboard all the spare parts and tools you may need is an essential part of sailing. There is no rocket science involved. There is also a great deal of confidence to be gained in becoming independent. In owning boats there are many times when things break and the only one to fix it is you. It's part of the game.
07-14-2014 05:57 PM
smurphny
Re: Yanmar 2GM20F Oil pan leaks

Just my opinion but knowing how to fix your engine and having aboard all the spare parts and tools you may need is an essential part of sailing. There is no rocket science involved. There is also a great deal of confidence to be gained in becoming independent. In owning boats there are many times when things break and the only one to fix it is you. It's part of the game.
07-14-2014 05:29 PM
zekingpo
Re: Yanmar 2GM20F Oil pan leaks

Yeah, I know it's pretty accessible but it's all the experience with torque ratchets and engine repair that I don't have that scares me a little. I am enticed to give it a try but as you said it yourself, Murphs are always candidates for the inevitable
07-14-2014 05:09 PM
smurphny
Re: Yanmar 2GM20F Oil pan leaks

Quote:
Originally Posted by zekingpo View Post
Yes, the oil pan is independant.

But the gasket that appears to be leaking is the one of the timing gear case.

I wish it would have been only the pan...
Oh, sorry. I thought it was the pan. The gear case cover is actually easier because you can see it without mirrors and gymnastics:-). +1 on getting the real Yanmar maintenance manual. They're not cheap but absolutely necessary to keep aboard.
07-14-2014 04:20 PM
zekingpo
Re: Yanmar 2GM20F Oil pan leaks

Quote:
Originally Posted by RichH View Post
The timing cover is easily removed, once you get the crankshaft sheave off - just a big nut ... and a shaft-key thats easily lost or dropped into a deep bilge.
Yes, I understand. But for neophytes like me, it is still something that doesn't seem so accessible.

It will be between a nice contract to a marine mechanic or a DIY big leap for me...
07-14-2014 04:16 PM
RichH
Re: Yanmar 2GM20F Oil pan leaks

Get yourself the 2/3GM "engine repair and maintenance" manual. Most larger Yanmar distributors have them.

The timing cover is easily removed, once you get the crankshaft sheave off - just a big nut ... and a shaft-key thats easily lost or dropped into a deep bilge.
07-14-2014 04:04 PM
zekingpo
Re: Yanmar 2GM20F Oil pan leaks

Yes, the oil pan is independant.

But the gasket that appears to be leaking is the one of the timing gear case.

I wish it would have been only the pan...
07-14-2014 03:51 PM
smurphny
Re: Yanmar 2GM20F Oil pan leaks

Are you sure the timing gear case needs to be removed? It's been a while since I did my 3GM but think I remember that the pan is independent of anything else.
07-14-2014 03:12 PM
zekingpo
Re: Yanmar 2GM20F Oil pan leaks

Yeah, the pan wouldn't have scared me too much, but it's the timing gear case that needs to come off... (see page at right here : Boatinfo - Yanmar Service Manual for 1GM10, 2GM20, 3GM30, 3HM35)

Quote:
Originally Posted by smurphny View Post
All of us Murphs have a special vulnerability to the law BUT I did manage a complete ring job on my 3GM30F with the engine in place. Your pan may well drop down in place which makes a new gasket a fairly easy job. Just drape a cloth to catch the inevitable dropped bolt, lay a mirror in there along with a good bright lamp, and go easy with the 10mm wrench. Pan bolts usually come out without a fight because they rarely get rusted in place and are not torqued very much. For any rounded off heads on marine engines I've found it pays to keep both U.S. sized wrenches and metric for those in-between sized rusted bolts. Also make sure you have 6 point sockets, not 12. Put it back together with good gasket cement. Gasket cements have come a long way and can be used with or without a paper gasket.
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