Hi all -
I need help with my E53 JCW Coupe. After spinning a bearing on the race track, I undertook a performance rebuild of the engine - new stock rods & crank (balanced), Mahle Motorsports 9.2-1 compression pistons (balanced), 15% overdrive pulley, etc. Everything in the engine is new or renewed - & there is what sounds like a chain rattle under light load that we can't make go away after replacing the chain, tensioner, & everything else we could think of, as well as massive detonation under load.
Is there a shop in the San Diego area that might be able to help? At this point, I'm considering just getting a factory rebuilt long block & be done with it even though I've got close to $7000 into the process & the swap is going to be another $5K!
Any ideas? Anybody out there who can properly diagnose the issues & maybe do a dyno tune?
Thanks, Jim
I need help with my E53 JCW Coupe. After spinning a bearing on the race track, I undertook a performance rebuild of the engine - new stock rods & crank (balanced), Mahle Motorsports 9.2-1 compression pistons (balanced), 15% overdrive pulley, etc. Everything in the engine is new or renewed - & there is what sounds like a chain rattle under light load that we can't make go away after replacing the chain, tensioner, & everything else we could think of, as well as massive detonation under load.
Is there a shop in the San Diego area that might be able to help? At this point, I'm considering just getting a factory rebuilt long block & be done with it even though I've got close to $7000 into the process & the swap is going to be another $5K!
Any ideas? Anybody out there who can properly diagnose the issues & maybe do a dyno tune?
Thanks, Jim