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Oiling Issue Resolved, but the damage is done |
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farna 
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Moderator Lost Dealership Project Joined: Jul/08/2007 Location: United States Status: Offline Points: 7132 |
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 Posted: Aug/25/2009 at 12:30pm |
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In a pinch the shaft could be drilled on the "top" side using the bottom as a guide.... just drill straight through the existing holes out the other side. Even though the shafts aren't expensive, if you're planning on switching to a 4.0L head you may as well drill the shaft through for now.
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Frank Swygert
American Motors Cars Magazine www.amc-mag.com |
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rotax21
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Joined: Sep/13/2009 Status: Offline Points: 6 |
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Posted: Sep/21/2009 at 11:31pm |
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I just inherited a 1966 Classic Wagon with a 232 and it has a noisy valve train.
I pulled the valve cover off today and ran the engine with little to no evidence of oil, so I pulled the rocker shaft assy. off and started disassembling. The shaft has some wear and galling as do the rocker arms. I plan on buying a new shaft and rockers, however I want to make sure I get enough oil flow to the top end.
Where do I find out about the radiusing of the head bolt? Is that what I need to do?
Thanks,
Lee |
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farna
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Posted: Sep/22/2009 at 7:22am |
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It's not a head bolt, it's one of the rocker shaft mount bolts. Find the info at http://www.mattsoldcars.com/RestoreAmerican/boltmod.shtml
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Frank Swygert
American Motors Cars Magazine www.amc-mag.com |
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pacerman
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Posted: Sep/22/2009 at 11:23am |
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Nobody's perfect. Although Frank's advice is usually spot on. The modification is made to a head bolt. The matt's old cars reference above explains it. I did it on my 66 Rambler with the 199 using the AMC service bulleting that Matt's site references. Joe |
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Happiness is making something out of nothing.
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farna
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Posted: Sep/22/2009 at 3:55pm |
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You're right -- nobody's perfect!! Thanks for pointing this out, I was going 100% from memory, and did recall that one of the shaft mount bolts need to come out. At least he'd have figured it out after reading the instructions on the site.
The head modified bolt makes perfectly good sense, but I don't know WHAT the engineer who dreamed up the external oil line was thinking! AMC actually issued a kit with a rocker shaft bolt drilled down from the top center then cross drilled (maybe not all the way through, I forget!) so it would dump oil inside the rocker shaft. A piece of tubing was press fit (or soldered...) into the top and extended out of the valve cover through a grommet inserted in a hole drilled for it. A piece of tubing was attached and led down to a fitting in the main oil galley. What a piece of work! The TSB detailed the mod enough that a dealer could make it instead of ordering the kit. I bet a shop mechanic who had to install a couple of those came up with the better idea of radiusing the bolt... Edited by farna - Sep/22/2009 at 3:55pm |
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Frank Swygert
American Motors Cars Magazine www.amc-mag.com |
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KermitDRambler
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Joined: Jul/06/2007 Location: Cincinnati, OH Status: Offline Points: 2276 |
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Posted: Sep/22/2009 at 3:57pm |
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Make sure you check the oil pressure with the engine hot and at idle. If you have less than 13 PSI, the engine likely needs bearings to fix it. The head bolt mod will not fix an oil pressure problem.
Matt
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1967 American wagon
http://www.mattsoldcars.com |
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purple72Gremlin
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Posted: Sep/22/2009 at 4:11pm |
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rotax21
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Posted: Sep/23/2009 at 12:05am |
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After posting last night I did an internet search and found Matts page.
I modified the head bolt today and cleaned all the rockers and shaft.
Reassembled and fired her up tonight.
It purrs now. Very quiet and a visible oil supply.
I am still going to buy a gauge to check the oil pressure, and I will eventually buy
a new shaft and rockers, it will work for now.
Thanks for all your help.
Lee
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1968AMC770Wagon
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Posted: Sep/23/2009 at 5:03pm |
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Wish I had the same luck as you...but heck, gives me a good reason to build my engine the way I want it!
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Zach Orcutt
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FuzzFace2
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Posted: Sep/23/2009 at 5:08pm |
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Dave ---- |
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75 GremlinX v8
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farna wrote: