| What Did I Find in the Bottom of My Oil Pan [message #248847] |
Tue, 29 April 2014 20:13  |
Bruce Hart
Messages: 1500
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
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Coming back from Montgomery Our motor home spun a main bearing.
Jim brown had a rebuilt engine in his collection of parts. I test ran the engine on a motor stand, everything was ok except the new fan clutch didn't engage and the temperature got too hot so I shut it off after 5 minutes of run time. I wasn't sure about my temp gauge as it didn't read the same as an IR probe that I had. Ran again and shut down after another seven minutes due to overheating. Next morning I started it up again with a vacuum gauge and set the timing, it was a bit too advanced and I was able to run for 15 minutes before overheating.
With the run time that I had I found a couple of oil leaks, one on the back China Wall and another on the back side of the oil pan.
Removed intake and found that it had a turkey tray and no block offs. Ordered the Mondello block off plates and gasket. Removed oil pan and two push nuts were in the bottom of the pan. Fits a 5/16" shaft and .540 O/D.
http://www.mcmaster.com/#push-nuts/=rr5mvj
Where did they come from? I won't think an engine builder would use such a cheap fastener. Did they originate out of the inside of the motor. The motor does have roller lifters and double timing chain sprocket.
Sorry unable to take any pictures ans our camera broke on our trip to Montgomery.
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
[Updated on: Tue, 29 April 2014 20:14] Report message to a moderator |
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| Re: What Did I Find in the Bottom of My Oil Pan [message #248860 is a reply to message #248847] |
Tue, 29 April 2014 21:38  |
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wally
Messages: 643
Registered: August 2004
Location: Omaha Nebraska
Karma: 5
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Senior Member |
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| Bruce Hart wrote on Tue, 29 April 2014 20:13 |
Coming back from Montgomery Our motor home spun a main bearing.
Jim brown had a rebuilt engine in his collection of parts. I test ran the engine on a motor stand, everything was ok except the new fan clutch didn't engage and the temperature got too hot so I shut it off after 5 minutes of run time. I wasn't sure about my temp gauge as it didn't read the same as an IR probe that I had. Ran again and shut down after another seven minutes due to overheating. Next morning I started it up again with a vacuum gauge and set the timing, it was a bit too advanced and I was able to run for 15 minutes before overheating.
With the run time that I had I found a couple of oil leaks, one on the back China Wall and another on the back side of the oil pan.
Removed intake and found that it had a turkey tray and no block offs. Ordered the Mondello block off plates and gasket. Removed oil pan and two push nuts were in the bottom of the pan. Fits a 5/16" shaft and .540 O/D.
http://www.mcmaster.com/#push-nuts/=rr5mvj
Where did they come from? I won't think an engine builder would use such a cheap fastener. Did they originate out of the inside of the motor. The motor does have roller lifters and double timing chain sprocket.
Sorry unable to take any pictures ans our camera broke on our trip to Montgomery.
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There are push nuts like pictured on the oil pump drive shaft. I think the purpose is to keep the hex shaft in the pump if the distributor is pulled up and out. Attached is an image link to a Melling pump test, you can see the push nut on the hex shaft.
http://www.gmcmhphotos.com/photos/melling-22fhv-oil-pump-pressure/p18204.html
HTH
Wally Anderson
Omaha NE
75 Glenbrook
[Updated on: Tue, 29 April 2014 21:50] Report message to a moderator |
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