My 20XE has been off the road for some time as I have been plagued by one problem after another. I thought I had it cracked, just an oil leak from the pully end of the crankshaft.
So a new oil-seal and thrust ring later and it is still ****ing out. Not at idle, it is fine then, but give it several short sharp revs and the oil is running out. It is defo coming from the crank as I have taken the belt cover backing plate off and run the engine to make sure.
So I asked the fitters at work, and by a majority of 4 to 1 they have come to the decision it is the mains are worn and this is allowing the crank to wobble and break the seal allowing the oil out.
So to day I have removed the sump (again, 3rd time) and dropped off the main-caps. The bearings are in a bad way, uneaven wear and speckled with marks where bits of swarf have been impacted into the surface. Thankfully the crank is not scored as I don't really want to have to take it out as that means dropping the gearbox, removing the oil pump etc.
OK, so it's the mains I hear you all agree, but here is the rub. They are marked 0.25. Nothing strange about that, just suggests a re-grind has been done at some stage. So I decided to drop off one of the big ends to see what they are like. They are fine, very light wear, so light you can still see the machining marks on them across the face of the bearings. But they are stamped 0.5.
So right now I am like "WTF?" surely if it has been re-ground to 0.5 on the big-ends then the mains will be too? Or has someone shoved the wrong size shells in the mains to get the job done?
Trouble is I need this car on the road ASAP and the budget will stretch to the main bearings but little else.
So has the problem been caused by the wrong sized shells being fitted, should I just fit in a set of 0.5s and hope?
Any gen? All comments will be gratefully received.