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| Burning oil, low compression in #3 & hesitaion | |
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| Tweet Topic Started: Nov 18 2009, 03:52 PM (3,680 Views) | |
| jmac | Jan 22 2010, 03:57 PM Post #16 |
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New Member
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After measuring the cylinder bore and finding all cylinders within spec, I went ahead and installed the Beck Arnely rings--I just attributed the differing widths to a design/material trade off made by BA engineers. Fast forward to today. I just completed my 500 mile post-rebuild oil change. Happily, the oil level was basically the same as just after the rebuild and it was quite clean. I'm no longer burning oil and I've not experienced any hesitation. In fact, my '92 has a little extra kick during acceleration. I could not have done it without the excellent guides and help on this site, Thanks. Here are few photos from the completion of the project: ![]() 15 minutes of lapping per Stainless exhaust valve but, I was able to get a good seat. ![]() Honing was really straightforward and quick with the flexible hone. ![]() Very pleased to install the pistons with project completion in sight. |
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| Rooy | Jan 22 2010, 05:26 PM Post #17 |
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Did you measure the ring end gaps with the rings in the cylinders? I would've had the valve seats cut by a machine shop if putting in new valves. Heavy lapping is not good, since it makes the seating surface concave. It will seal, but not last as long as one done properly. Btw, Beck Arnley doesn't make parts, they just slap their name on the box and distribute. |
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| Johnny Mullet | Jan 22 2010, 09:58 PM Post #18 |
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Fear the Mullet
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Hand lapping valves has always worked for me. The stainless valves take more time, but it's not hard to do and pretty straightforward. |
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| bansheetaz | Jan 22 2010, 10:02 PM Post #19 |
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ive taken a piece of rubber hose and slid it over the end of the valve stem that sticks out and then chucked the other end of the hose in a cordless drill. laps valves in a hurry. |
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| Johnny Mullet | Jan 22 2010, 10:43 PM Post #20 |
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Fear the Mullet
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Dude! I tried using my cordless to lap valves, but could not get the chuck to reach the valve stems. You are a genius
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| idmetro | Jan 23 2010, 10:31 AM Post #21 |
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Anybody got pictures of what the valve and valve seat look like before/after they are lapped? This job is out on the horizon and I'd like to be prepared. Update: I just found the awesome head rebuild guide on this forum so I shall go eat my slice of humble pie and remind myself to use the search function before opening mouth....
Edited by idmetro, Jan 23 2010, 11:35 AM.
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| starscream5000 | Jan 23 2010, 10:41 AM Post #22 |
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Got 70 MPG?
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Pretty smart thinking there for a shade tree job! |
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| jmac | Jan 24 2010, 02:26 PM Post #23 |
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New Member
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Below is a close-up of my problem cylinder, #3. It was noticeably wetter and more deposited than the other two. As it turns out, what I thought was a hesitation problem prior to the rebuild, was actually a backfire. The air filter had a hole burned clean through it. I don't think either of the valves from #3 were seating properly. Rebuild guide was invaluable. While a proper repair manual is on my shopping list, I was able to successfully complete this rebuild via the guide and torque spec page.
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1:55 PM Jul 11