Just some fun shots of the stripped down crankcase. It’s quite a work of art. I stop and admire it every step of the process.
I thought Diablo Oem pistons are from Mahle ?
I have not checked the crankshaft but I'm pretty sure it will need to be ground. I agree on the lack of oil. Possibly some debris in one of the oil passages...? Unless all this happened before I bought the car and it lost oil pressure then. When I got the car it had been running so rich that the oil was full as gas. Not sure if this is enough to cause this amount of damage but its certainly not good. I guess it would depend on how long it was run like that. My pistons are at least very similar to those. They don't appear to be in bad shape but I need to mic them. Does any one have a pic of the backside of an original piston? Mine are a greenish color and say Mahle on them.I thought Diablo Oem pistons are from Mahle ?
Btw from the worn bearing pic it seems like there’s lack of engine oil flow through and probably one of the cause of many worn out areas at the bearings , have you checked is your Cranshaft still within spec ?
May I get more information about the Cranshaft can only be resurfaced only twice and the reason ? Is this due to the no suitable over/under size bearing ?I've been doing some measuring to determine just what needs to be replaced other than the obvious (bearings, sleeves, and rings). The crankshaft has not been resurfaced so that it very good considering it can only be done twice. The pistons are looking to be within spec too but I'm still considering replacing them since I'll be doing so much else. Any thoughts on this? I certainly don't want to be replacing perfectly good parts but at the same time I don't want to replace everything but the pistons and leave them as a weak point.
Thanks for the info !Sorry, I didn't really mean that it CAN'T be ground twice but just that Lamborghini only makes bearings for two undersizes I believe so they probably only intend for you to undersize it twice and beyond that you may be compromising it's structural integrity. I suppose you could get custom bearings and have it ground as many times as it can take until it breaks. It's hard to say where that limit really is I think. Some engine builders actually grind them as small as possible to reduce weight and increase performance. I'm just glad it is original spec to start with.