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VaccaRabite |
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En Garde! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 13,475 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region ![]() |
So, at the Sterling meet I did a leakdown test on my motor, and found a problem with Cylinder 1. 45% leakdown, but 120 lbs of compression. Was tempted just to let sleeping dogs lie, but pulled the head off.
What was going on was clear as soon as we did that, the head was not totaly sealed to the cylinder, off by a very small amount. Instead of having the head recut, I decided to try and lap the two of them together. So, last night I hand lapped them, using ground graphite to check for even contact. I got good contact after the third round of hand lapping (lap, clean, check). Now I need to get the jug back on the block. I have a ring compressor on the piston, but I can't ficgure out how to get the head back on. Do I have to take the piston head off the rod? If so, how do I get it off. It looks like that tis a spring keeper that needs to be removed. Is there anyhting on the rod the needs to be loosened before I can pull the pin out to remove the piston head? Obviously, if there is a trick to getting the jug back on without pulling off the piston head, I'd like to do that. Zach |
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type47 |
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Viermeister ![]() ![]() ![]() ![]() Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region ![]() |
it may be difficult to install the jugs on to an engine with the pistons connected to the rods. if one was rebuilding an engine, then the pistons can be installed into the cylinders on the bench, then push the piston toward the bottom of the cylinder to expose the piston pin holes but not so far as to free the rings, then, with the crank turned to expose as much of the rod as possible, mount the piston on the rod and insert the wrist pin. you have your piston already on the rod on the "short-long" block. you can try to use the ring compressor to compress the rings (guess that sounds kinda "duh") and put the cylinder on the piston and attempt/try to basically "push" the ring compressor "off" the rings by pushing the cylinder onto the piston. you are probably doing this exact thing but it's hard to do it this way as you are experiencing. if this doesn't work, you can remove the piston from the rod (easily done to tap out the wrist pin) and assemble on the bench (as mentioned before) then mount on the rod. there is one or 2 problems encountered (or at least, that i encountered): one is having the clearance to get the wrist pin "out the other side of the piston" before it hits the next cylinder and two is depending on the cylinder, the oil filter tower gets in the way of installing the p/c next to it and can only be accessed from the side opposite side of the p/c. i don't think you'll have that problem as that is #4 p/c (i think) next to the oil filter tower and i seem to recall you were removing #2 (?) cylinder.
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