Carbon Question,pros or backyard
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Ultimate HDF Member
Joined: Mar 2007
Posts: 6,112
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Carbon Question,pros or backyard
OK guys heres the thing,had a noise in the engine seemed like from lifters so replaced them,didnt work.Borrowed a bore scope and have a heavy carbon deposit on both piston and intake valve,not leaking(done a leakdown)but the tapping is nuts.Diagnosis leaking valve seal,ok but no time have to make a 1500 mile trip in 2 days.So ? anything I can do to get some of the carbon off quick?Worried about big chunks scoring something or bending something important. Any kind of help much appreciated,thanks.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
well,
you can always try spraying water into a running motor.
with motor running and intake exposed have someone crank the throttle wide open and at the same time spray as much a fine mist of water into the intake as you can, while keeping the motor running.
that'll remove carbon.
cave man style
mike
you can always try spraying water into a running motor.
with motor running and intake exposed have someone crank the throttle wide open and at the same time spray as much a fine mist of water into the intake as you can, while keeping the motor running.
that'll remove carbon.
cave man style
mike
Road Warrior
Joined: Aug 2009
Posts: 1,432
Likes: 0
From: Central Florida, USA
What brand of gas you using and are you doing oil changes on time? I've never heard of that much carbon build up in a properly maintained motor. As to removing it, you can add techron to the tank per the recommendations and it'll remove it as you ride. Since your're doing a long ride it should help clear it pretty quick. Chevron, Shell, Mobil, and Sunoco are good gasolines to use that will help prevent the build-up.
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