65 Re: Turbo on 26th March 2015, 7:33 pm
ok just for everyones interest we got this car in now and have finally got to the bottom of whats happened to it
was running a 3076r tubby initially which went kaput but turns out prior to this happening a boost pipe blew off on the car which then overspooled the turbo and then suffered bearing damage but car was nursed back with turbo not running and this is when I believe the damage in the below pics was caused.
I believe the oil restrictor blew out of the front of the block due to being hugely over pressurised as oil galleries have loads of swarf and debris picked up from turbo collapse.
also there is oil showing around the port on no1 cylinder (compressions are good though) so I would hazard a guess that debris has been caught on oil control rings allowing oil blowby.
pics of where restrictor came from (lucky it never lifted chain from sprocket)
heres pic of oil filter which we cut open with a chisel, as you can see it was full of metal fragments.
also pic of bits of debris just from the end of oil gallery where restrictor was blocked and blew out under pressure (never seen this happen before)
last but not least the wet oil on exhaust port on no1 cylinder
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