Quote:
Originally Posted by Malekreza11
Thanks for the reply.
As suspected, the issue you are experiencing is most likely due to a poorly balanced motor. Harmonic vibration will wreak havoc on the motor and it will do it incrementally depending on how bad the balance is.
Misfires combined with a imbalanced motor will amplify the effect as the motor is already off balance and repeated misfiring will effect the way the motor runs.
Did your engine machinist or mechanic by any chance mic the tolerances of the motor to see how tight or loose it was assembled? Overly tight motors will tend to bind up easier and wear out excessively. This is indicative of your crank bearings.
Bottom line is, you made a good move to have the motor rebuilt with new parts. But just please make sure whoever is doing the re-assembly does it in a controlled dust minimal and contaminant free environment. Engine assembly is a crucial process, especially on high strung, high power motors.
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Thanks for the reply Malekreza. He did not really mic the tolerances of the motor unfortunately as he wanted to clean up the block quickly and salvage the crank. He claims that if i were to have driven the car for another 1-2 months, the crank would have been gone as well. The crank is in perfect shape now after some slight polishing. There were metal bits in the engine oil which wreacked the most havoc on the cylinder walls and it left a piece of metal stamped onto the top of one of the pistons if you look carefully in the photos above.
Yeah the photos of the almost complete motor is done in a very controlled environment and the new motor looks absolutely gorgeous with the new parts, especially the forged pistons and Carillo Rods.