Jump to content
Strawberry Orange Banana Lime Leaf Slate Sky Blueberry Grape Watermelon Chocolate Marble
Strawberry Orange Banana Lime Leaf Slate Sky Blueberry Grape Watermelon Chocolate Marble

NEW: Following member feedback, we now have a Mooring & Marina Review forum. Post your review here.

Arthur Marshall

SR2 losing oil

Featured Posts

My Lister SR2 has lost a litre of oil in about 15 hours running. It seems to have wound up in the drip tray in the bilge and I can see no obvious place it's coming from. Prior to this, I found at the last oil change 3 days ago it was down by a litre and a half but couldn't remember when I last checked. 

Any ideas? Everything seems to be tight. 

Gearbox has been off and on recently, engine rebuilt five years ago. 

I'm not far from Chas Hardin on the Shroppieso could stop there if nec or try to make it home to Macclesfield. 

ETA can't see it's relelvant, but I've a blown  gasket on the exhaust too. 

Edited by Arthur Marshall

Share this post


Link to post
Share on other sites

Obvious places are:

 

Crankshaft oil seal

Camshaft oil seal

Rocker cover joints

Door joints

 

The last three are easy to see, the first will mean a lot of oil coming out around the fuel pump housing

 

Far less obvious are:

 

The oil pump on the bottom of the block, front left

The feed to the oil pressure gauge (if you have one)

 

Richard

Edited by RLWP

Share this post


Link to post
Share on other sites

IIRC There is a felt ring and bronze spiral oil seal at the back of the crank, behind the flywheel.  If that leaks or spins the oil comes out of the bottom of the flywheel housing.

 

If you can afford the oil, I would be inclined to work your way back to home, checking the oil regularly and looking hard to see how it is getting into the bilge.  If you can, mop out the bilge and wipe off the accessible bits of the underside of the engine.  Then put  a good thick  layer of clean newspaper in the bilge. Any Sunday paper will have enough newsprint for the job!

 

Check after about half an hour and see where the drip is.  That will give you a start and maybe a trail of oil to follow.

 

 

 

  • Greenie 1

Share this post


Link to post
Share on other sites

I'm wondering if might be as simple as the pipe from the drain plug to the pump used to get the oil out for a change having sprung a leak. Its been there for 20 years. Going to call in at the yard tomorrow for them to have a look as I can't physically get down there any more! 

Share this post


Link to post
Share on other sites
6 minutes ago, Arthur Marshall said:

I'm wondering if might be as simple as the pipe from the drain plug to the pump used to get the oil out for a change having sprung a leak. Its been there for 20 years. Going to call in at the yard tomorrow for them to have a look as I can't physically get down there any more! 

 

Damn - I forgot to mention that one!

Share this post


Link to post
Share on other sites
1 hour ago, Arthur Marshall said:

I'm wondering if might be as simple as the pipe from the drain plug to the pump used to get the oil out for a change having sprung a leak. Its been there for 20 years. Going to call in at the yard tomorrow for them to have a look as I can't physically get down there any more! 

I know that feeling 🤮

Share this post


Link to post
Share on other sites

There's nothing obvious that I can see round the sides of the beast,no oily bits that shouldn't be oily. I'll see what Chas can come up with tomorrow. 

Share this post


Link to post
Share on other sites
On 25/07/2019 at 18:24, Arthur Marshall said:

I'm wondering if might be as simple as the pipe from the drain plug to the pump used to get the oil out for a change having sprung a leak. Its been there for 20 years. Going to call in at the yard tomorrow for them to have a look as I can't physically get down there any more! 

I have had the internals fail in one of those brass pumps, with the oil backing up and flowing out as if the pump was being operated. If yours doesn't have an isolation valve, it may be that. 

Share this post


Link to post
Share on other sites
1 hour ago, BWM said:

I have had the internals fail in one of those brass pumps, with the oil backing up and flowing out as if the pump was being operated. If yours doesn't have an isolation valve, it may be that. 

I did wonder about that too, but there doesn't seem to be any sign of oil from it. I'll replace it anyway ASAP and an isolator is a good idea too. Chas didn't have time to look, so im heading home... Two days later, the stick still shows full, which is odd. Damn boat makes me nervous when it mucks me about. 

Share this post


Link to post
Share on other sites
2 minutes ago, Arthur Marshall said:

I did wonder about that too, but there doesn't seem to be any sign of oil from it. I'll replace it anyway ASAP and an isolator is a good idea too. Chas didn't have time to look, so im heading home... Two days later, the stick still shows full, which is odd. Damn boat makes me nervous when it mucks me about. 

You may not notice any oil as it exits the spout, if you don't have a shut off valve it might well be it. From memory it tended only to come out under certain conditions, and could drop a fair amount of oil, due to a siphon type effect i presume. Ours would have been about 20 years old too...

Share this post


Link to post
Share on other sites
On 25/07/2019 at 16:39, BEngo said:

IIRC There is a felt ring and bronze spiral oil seal at the back of the crank, behind the flywheel.  If that leaks or spins the oil comes out of the bottom of the flywheel housing.

 

It's coming out where the arrow's pointing below.  It's not running down from the rocker covers, or, as far as i can see, anywhere else. It started as a small ooze of oil but over an eight hour day is now losing about half a litre.  Not sure if this is where you mean?

Lister Sr2 oil leak.jpg

Share this post


Link to post
Share on other sites

Richard's the man for this but if you are 100% sure its not a rocker cover gasket then I fear it may be from the cylinder barrel to crankcase gaskets. In my day they were single layer copper gaskets. Have you poked out the crankcase breather tubes located under the rocker cover? I can't see how two could block but excess crankcase pressure can make any engine leak oil from gasketed joints.

 

Edited to add that you should be able to see the barrel to crankcase joint if you remove the air outlet ducting I think but you may not be flexible enough to look in there

Edited by Tony Brooks

Share this post


Link to post
Share on other sites

Does it appear from the gasket between the fuel pump housing and the block?  as there is a reasonable amount of oil lying in that area while running as well laying in the fuel pump housing area before draining back into the sump 

Share this post


Link to post
Share on other sites
2 hours ago, Arthur Marshall said:

It's coming out where the arrow's pointing below.  It's not running down from the rocker covers, or, as far as i can see, anywhere else. It started as a small ooze of oil but over an eight hour day is now losing about half a litre.  Not sure if this is where you mean?

Lister Sr2 oil leak.jpg

The felt ring and bronze spiral I described  are at the gearbox end, so they are not your problem.  From your arrow I would expect it to be either the front crankshaft oil seal, or the camshaft oil seal , as mentioned by Richard earlier, or the gasket behind the housing  indicated by your arrow.  Can you check all the nuts/bolts through it are still tight?

 

Share this post


Link to post
Share on other sites
1 hour ago, Woottonlaser said:

Does it appear from the gasket between the fuel pump housing and the block?  as there is a reasonable amount of oil lying in that area while running as well laying in the fuel pump housing area before draining back into the sump 

Could be. I rather suspect a gasket as it's worse when cold. As the engine heats up the leak gets less, presumably as the thing expands.  I'm surrendering it to a boatyard in the hope they can track it down and sort it.

Just now, BEngo said:

The felt ring and bronze spiral I described  are at the gearbox end, so they are not your problem.  From your arrow I would expect it to be either the front crankshaft oil seal, or the camshaft oil seal , as mentioned by Richard earlier, or the gasket behind the housing  indicated by your arrow.  Can you check all the nuts/bolts through it are still tight?

 

Nuts and bolts are tight.  I'll mention all these suggestions to the yard when I finally get in there...

 

Share this post


Link to post
Share on other sites

The man reckons its the crankshaft oil seal.  It's lucky I'm rich.

Well, it would be, if I was.  I'll have to repeat three times after meals "I like boats..."

Share this post


Link to post
Share on other sites
59 minutes ago, Arthur Marshall said:

The man reckons its the crankshaft oil seal.  It's lucky I'm rich.

Well, it would be, if I was.  I'll have to repeat three times after meals "I like boats..."

According to your arrow Arthur the leak looks too high up to be a crankshaft oil seal.

Share this post


Link to post
Share on other sites
2 hours ago, Arthur Marshall said:

He reckons its leaking from the seal and then blowing through with the fan and just coming out along the gap there.

Rear main bearing oil seal? Suck of teeth " That will be pricey".

Is the crankcase breather clear? Any crankcase compression will make it worse.

Edited by Boater Sam
added more

Share this post


Link to post
Share on other sites
36 minutes ago, Boater Sam said:

Rear main bearing oil seal? Suck of teeth " That will be pricey".

Is the crankcase breather clear? Any crankcase compression will make it worse.

Nothing else seems to be wrong. If I'm poodling up a lock flight it hardly loses any oil. It's when it goes cruising at a flat out 3mph that it seems to chuck it out. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.