JJC Posted November 23, 2016 Report Share Posted November 23, 2016 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 Quote Link to post Share on other sites
Lebro Posted November 23, 2016 Report Share Posted November 23, 2016 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. Quote Link to post Share on other sites
RogerH Posted November 23, 2016 Report Share Posted November 23, 2016 Hi John/Bob, the coil mounting screws DO go into the area where the tappets are. This is pressurised with crankcase pressure. That would be a serious leak Roger Quote Link to post Share on other sites
james christie Posted November 23, 2016 Report Share Posted November 23, 2016 Like the set screws that hold the dynamo bracket, the screws holding the coil bracket go through the block. It's a good idea to wire lock them - don't ask me how I know James Quote Link to post Share on other sites
JJC Posted November 23, 2016 Author Report Share Posted November 23, 2016 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 Quote Link to post Share on other sites
JJC Posted November 24, 2016 Author Report Share Posted November 24, 2016 Just been running the engine and it doesn't look like that. Also I moved the coil on our TR2 years ago onto the wing and that's never leaked. Any more thoughts? JJC Quote Link to post Share on other sites
BlueTR3A-5EKT Posted November 24, 2016 Report Share Posted November 24, 2016 (edited) 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 November 24, 2016 by BlueTR3A-5EKT Quote Link to post Share on other sites
JJC Posted November 24, 2016 Author Report Share Posted November 24, 2016 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 Quote Link to post Share on other sites
RogerH Posted November 24, 2016 Report Share Posted November 24, 2016 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 Quote Link to post Share on other sites
JJC Posted November 24, 2016 Author Report Share Posted November 24, 2016 Roger - thanks I haven't looked there. It's on the list. JJC Quote Link to post Share on other sites
Richardtr3a Posted November 24, 2016 Report Share Posted November 24, 2016 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. Quote Link to post Share on other sites
JJC Posted November 25, 2016 Author Report Share Posted November 25, 2016 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 Quote Link to post Share on other sites
RogerH Posted November 25, 2016 Report Share Posted November 25, 2016 Hi JJC, it is amazing how engine blocks and parts go rusty so quickly. A slight film of oil can sometimes be a good thing. Quote Link to post Share on other sites
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