Cleaning tops of piston durring H/c
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TECH Apprentice
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Joined: Jan 2006
Posts: 386
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From: Atlantic city nj
Cleaning tops of piston durring H/c Does anbody clean the tops of their pistons during a heads/cam install? If you do or dont , please explain how , and why or why not
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Brake cleaner is flammable as a ****, if any of that seeps past your rings you could have some fireworks coming out of your bottom end on the inital start up.
I brought each cylinder up to TDC and used a razor blade to get all the carbon off.
I brought each cylinder up to TDC and used a razor blade to get all the carbon off.
TECH Resident
Joined: Oct 2005
Posts: 781
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From: Taxme, Ohio
My advice about cleaning the tops; don't use any liquid. It will carry the tiny granules into the ring area. where you won't be able to get it out aside from disassembly.
I first moved the piston down in the bore a few inches and put a very light coating of oil around the cylinder with my finger. The piston was then moved to TDC where it actually protrudes above the deck a tiny amount. I masked all the holes with towels and tape and proceeded to used a small putty knife where I had carefully removed all sharp corners. I had a shop vac on hand and running to suck up the particles as they became dislodged.
I just scrap with a good flat gasket scraper. By sure not to gouge the aluminum of the piston tops. I then blow that cylinder out with compressed air after covering all the other cylinders. The carbon takes a while to build up; I think it's a good idea to remove every time you have access to the pistons.
