: cold carbon rap



stoveguyy
01-27-11, 01:48 PM
had heads off 3yrs ago. only 15k miles. have done WOT. cold rap is getting louder. seems ok when warm. can a motor carbon up in 15k miles?

Submariner409
01-27-11, 03:43 PM
had heads off 3yrs ago. only 15k miles. have done WOT. cold rap is getting louder. seems ok when warm. can a motor carbon up in 15k miles?

Hard shot to call - if the car is a highway runner and uses mostly 93 octane with > 1,500 miles to the quart of oil, I'd say "Probably not".

BUT, if the car is a city dweller, slow running, lots of idling, various discount gas stations, 1,000 miles or less on a quart of oil, then I'd say "Maybe".

stoveguyy
01-27-11, 10:05 PM
egr stuck yesterday. has happened several times in last year. tried to clean valve with carb cleaner before. tap egr while motor is running and idle settles right down. maybe my motor is just carboned up. WOT won't help the egr valve.