Join Date: Nov 2012
Location: Orchard Park, New York
Ferrari Life Posts: 1,875
Dave, I was not suggesting .004" of clearance would be acceptable to me - it's not.
What I'm stating, as you mentioned, that even .001" of clearance will still allow movement.
Not sure I would want a fit any tighter than .0005". I've been guilty in machine design to over tolerance stuff and too tight can be bad just as too loose.
And of course you have been at this rodeo far more times than I. I'm not saying guide problems are not real, I'm saying I feel they are often mis diagnosed and guides are replaced when not needed.
.001" of clearance absolutely indicates no guide wear (or extremely minimal)
Keep in mind, while you are a detailed guy, and a guy with integrity, that does not represent the pool of shops. I'm sure you would agree that some shops might like the revenue from guide replacement, needed or not.
My 95 is an example of a car not well cared for that may have more miles than the OD states. If my bank 1 clearance is .001", it will be clear that my poor leakdown is a result of carbon buildup.
Too rich of fuel mixture? I'm kinda guessing that.
Last edited by dave rocks; 06-16-2015 at 06:04 AM.
Reason: spelling (again)