Oil leak again it seems to be coming down the fly wheel case any Ideas

[Jobs_a_ good_ un]

The oil leak seems to be coming down the fly wheel case and the drip starts at the back of the engine and is about half way up its width (side to side)
Theres about a couple of table spoons of oil after a 3-4 hour run
The breather is blowing a bit of oil on to the air filter but it doesnt seem enough for the amount im cleaning up
Any body got any Ideas
Thanks

 

[Kawasaki]

Does the flywheel bell housing have an inspection cap?

 

[duncan]

snap

have your tappetts been adjusted recently - ie rocker cover gasket? The manual goes into great lengths about having to clean and dry the gasket before refitting..............

 

[nedmin]

Is it a volvo? I bought a brand new boat in 1990 and had same prob. thought the crancase seal had gone, I finished up laying at side of engine,while running, and found it was coming out of one of volvo,s patent "push on pipe connections" on installation they hadnt got the "O" ring on square.Could it be this?

 

[Jobs_a_ good_ un]

The injectors were serviced last year but no ones touched the tappets
Myself and an engineer are going to have look whilst moving tommorrow will let you know

 

[Jobs_a_ good_ un]

Its a yanmar 6lp dte and were going to do what you did tommorrow to see if we can see were the leak is comming from ive spoken to ep barrus and they said theve never heard of a crank case seal going on a engine with only 700 hours on it Im praying its not the crank case seal nightmare if it is

 

[Jobs_a_ good_ un]

Cant see one but then again its so tight in there you can see sweet f.a ive looked from underneath up and the case is clear of any knobs and buttons

 

[PCUK]

Is the crankshaft seal replaceable without taking out the crankshaft? If it is, then it's not the end of the world, it's a [--word removed--] of a job but can be done in place if there's room to get the gearbox off. No more than a days work.

 

[Kawasaki]

Hope it isn,t but if there is oil in the bell housing it can mean the crank seal is weeping. Usually the result of worn crank, duff seal, or over filling. Had the same problem last year on my Volvo TAMD 30. My problem was the seal had actually worn a groove in the crank, yes it can happen! However all was not lost. Had a tool made initially to reposition the seal to sit on the crank in a different unworn part . Not being satisfied with that I discovered something made in the States called "Speedi Sleeve" An interfierence fit steel sleeve which is tapped onto the crank, so far so good (touches wood whilst fingers crossed!) The Volvo was 21 Years old you shouldn,t have that problem really, so if it,s just the seal Don,t Despair good luck! /forums/images/graemlins/smile.gif

 

[Lakesailor]

Re: Oil leak again it seems to be coming down the fly wheel case any I

Any blocked breather or deep breathing (worn rings or valve guides/seals) can cause a crankshaft seal to weep as they are not designed to resist pressure but to just wipe the journal and return oil to the crankcase. It could be a symptom of something else. Or it could be at fault itself. But it would be a bugger to replace the seal if that's not the problem.