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Oil leak advice


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I've been chasing an engine oil leak for ages and simply cannot track it down. It's not the crankshaft oil seal because the clutch housing weep hole is completely clean (it's a significant leak). I've already stopped a leak from the oil pressure gauge outlet and from the rocker cover. After I moved the coil to the inner wing the leaked oil seemed to be everywhere that side of the engine. I have a feeling it only happens at higher revs when pressure is about 75psi. I have fiddled with the oil pressure relief valve. A long time ago there was a list of known oil leaks on here, would be very grateful if someone could track it down and repost it. Thanks JJC

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Is it possible that the tapped holes which held the coil mounting bracket go right through to the inside of the block ?

If so, then plug the holes with screws.

 

Bob.

Thanks Roger and Bob. I thought about that and decided even Triumph wouldn't do that. I'll put copper washers under the bolts to provide a seal and give it a whirl. JJC
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I guess you have washed the side of the engine so no traces of oil leak exist then run the engine and inspected.

 

Rocker cover gasket shrunk? They do and normally cause a dribble down the back of the head.

 

Fuel pump? mount to block or the internal seal on the diaphragm stem failed.

 

Oil filter canister not seating as there is an old seal left in the filter head with the new one sat on top of it? Dig it out with a scriber and fit new.

 

Dribble from the push rod tubes that are fitted either side of the spark plugs?

Easy to reseal/reseat from above once the rockers and pushrods are removed.

Hammer and big taper punch.

 

Peter W

Edited by BlueTR3A-5EKT
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Peter

Thanks I'll work through those. We have tried washing off and running it up on ramps and couldn't see anything. I'm inclined to think push rod tubes because there's oil on that ledge. Not much admittedly but then it would get blown back. If the leak was lower down would it get blown up there? JJC

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Hi JJC,

the push rod tubes do leak but there is virtually no flow - nearly all stain.

The front seal in the timing chain cover can leak and throw it back everywhere - the hub gets a groove worn in it.

New hub is cheaper than a speedisleeve.

 

Roger

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Forget the new hub and fit a speedi sleeve but make sure that it is a speedi and not a fake one by another manufacturer.

A speedi solved a problem that I had for years and they are a proper company.

 

Go for it,

 

Richard & H.

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Hi JJC,

the push rod tubes do leak but there is virtually no flow - nearly all stain.

The front seal in the timing chain cover can leak and throw it back everywhere - the hub gets a groove worn in it.

New hub is cheaper than a speedisleeve.

 

Roger

Just looked at the bottom of the timing cover. Not only is there no oil on it at all but my new (2 years ago) bottom pulley is going rusty. The only place there isn't a film of oil. Next guess is distributor pedestal. There's oil there. JJC
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