R
Runningdog
Guest
I put together a piston pin puller out of some readi-rod, and a few proper-sized washers and bolts, and removed the pistons from the con rods on the 850. Carbon build-up wasn't too bad, but it was the right way to go about cleaning up the rings lands prior to installing the new rings.
Obviously, it was the first time the pistons had been off the motor (thus the requirement for the puller), but all went back together smoothly, with no persuading. New circlips popped back in.
Then my neighbour and I spent far too much time putting the cylinders back on the engine......used hose clamps as ring compressors, worked pretty good, but make sure you have them tight enough. After much deliberation, and quizing several engine rebuilders, put it back together with a bit of oil on the cylinder walls...cross-hatching went well, rings should have enough tooth to seat in. The rest of the top end will go back together later this weekend, unless some other entertainment pops up.....
Obviously, it was the first time the pistons had been off the motor (thus the requirement for the puller), but all went back together smoothly, with no persuading. New circlips popped back in.
Then my neighbour and I spent far too much time putting the cylinders back on the engine......used hose clamps as ring compressors, worked pretty good, but make sure you have them tight enough. After much deliberation, and quizing several engine rebuilders, put it back together with a bit of oil on the cylinder walls...cross-hatching went well, rings should have enough tooth to seat in. The rest of the top end will go back together later this weekend, unless some other entertainment pops up.....