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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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type11969 |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States ![]() |
Get a good penetrant like PB Blaster or Kroil, they work much better than Liquid Wrench. Also try getting some parrafin, heat the boss, touch the parrafin to the stud and let it wick into the case (tilt the case up to use gravity to help if you can). Get a couple of vice grips, like 3 or 4, on the stud as close to the base as possible (don't try double nutting, you will snap the stud due to the twist). Use all of them at once to try to spin it out.
I still broke a stud trying all of this, but this is the advice I got from people as the best way to try to get it free. I know people have said that it is a bitch to get the studs out if they snapped but a machinist buddy of mine got it out cleanly no problem. You may also want to try some liquid nitrogen on the stud to try to get the temp differential that much higher, only problem is ALs high thermal conductivity. Good luck! |
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