Carbon build up on piston.
Posted 04 May 2012 - 11:56 AM
Posted 04 May 2012 - 01:02 PM
Soak in kerosene, Seafoam, similar gunk/carbon cleaners. Do not use caustics on aluminum. Scotchbrite pads or soft metal brush to work with.
edit: there are dimensions to check for piston shape also. But the important part is cracks, and the nice square/sharp edge of the bottom of the piston skirt.
Cracks can be hard to find without using dyes and lights to find them.
Edited by ReconRat, 04 May 2012 - 01:16 PM.
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