 Fixing poor leakdown, Cyl 1 leaks at 50%, rest are cool. |
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| VaccaRabite |
 Oct 24 2007, 07:00 AM
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En Garde!  Group: Admin Posts: 13,754 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region 
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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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Posts in this topic
Vacca Rabite Fixing poor leakdown Oct 24 2007, 07:00 AM
Jake Raby
You don't need a tool.. You need my video. I... Jan 8 2008, 04:40 PM type11969 There are a couple of bosses on one side of the ca... Jan 8 2008, 05:06 PM Headrage
a rubber mallet with gentle strokes on parts of t... Jan 8 2008, 05:07 PM scotty b Before you try to split the case make certain you ... Jan 8 2008, 07:17 PM
Vacca Rabite
It took me an hour of cursing to find that very ... Jan 8 2008, 09:50 PM Vacca Rabite Oh, and when I was removing the top half from the ... Jan 8 2008, 10:08 PM type47
the two 1/4 inch studs the align the crank beari... Jan 9 2008, 11:49 AM Vacca Rabite One final question before going to bed.
Now that ... Jan 8 2008, 10:11 PM SGB uh-oh!
"while I'm in there" Jan 8 2008, 10:20 PM DNHunt Well lets see.
First, please tell me you stored ... Jan 9 2008, 07:50 AM Vacca Rabite Hey Dave,
I know what lifters go to what cylinder... Jan 9 2008, 10:02 AM Vacca Rabite GE is a bus case. GA is the 2.0 914 case.
I only... Jan 11 2008, 07:39 AM slowtwitch
GE is a bus case. GA is the 2.0 914 case.
I onl... Jan 11 2008, 08:43 AM degreeoff Zach, Look man come down and get my case....its si... Jan 11 2008, 07:47 AM type11969 Bus cases lead hard lives. If you are going to spe... Jan 11 2008, 08:00 AM degreeoff Yeah my next step is to throw dirt in it and make ... Jan 11 2008, 08:08 AM type11969 Thats a good deal, I'm tempted to buy it but t... Jan 11 2008, 08:14 AM Vacca Rabite Hey Josh,
I already have a RAT cam and gear, and ... Jan 11 2008, 08:21 AM type11969 ceramics . . . can't beat em
eventually I... Jan 11 2008, 08:43 AM Vacca Rabite Okay, just talked to Josh on the phone, and I am g... Jan 11 2008, 08:58 AM Jake Raby The register difference is not for specific case c... Jan 12 2008, 11:38 PM gjones
So, at the Sterling meet I did a leakdown test on... Jan 20 2008, 10:26 AM Vacca Rabite Nope, lapping did not work.
Did you try the bubbl... Jan 20 2008, 11:15 AM gjones
Nope, lapping did not work.
Did you try the bubb... Jan 20 2008, 09:49 PM Vacca Rabite Do a leak down test. While you are pressurizing t... Jan 20 2008, 11:26 PM gjones
Do a leak down test. While you are pressurizing ... Jan 25 2008, 06:35 PM Vacca Rabite I did 2 things.
1) I had the half with the droppy... Jan 25 2008, 07:10 PM Dr Evil Need help this WE? Jan 25 2008, 08:47 PM Vacca Rabite Sunday work for you? If so, YES.
Zach Jan 26 2008, 12:46 AM Jake Raby So you only decked one case half??
If so now you... Jan 26 2008, 12:48 AM Dr Evil He was gonna have to do geo on both anyway. I alre... Jan 26 2008, 09:42 AM  |
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