Originally Posted by smitter113fd
engine is low mile.......has about 3500kms on it.......builder figures it is carboned up as what he refers to as black death due to a rich tune.
It tested in the mid 40s on all sides on both rotors using the mazda compression tester
As an engine builder, I can tell you that your builder is full of it. Sounds like build error to me, although I wonder why the engine lasted as long as it did.
It could be a stuck side seal that's overpressurizing the oiling system......An engine might die from being over-carboned over 50,000 miles, not 2000 miles.