 If you built a 2056 |
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| Geezer914 |
 Sep 15 2021, 05:04 PM
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Geezer914  Group: Members Posts: 1,388 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States 
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I just built a 2056 and had a number of no start issues, I finally got the engine to start. but it looks like I wiped out the cam. So I have to start over with a complete tear down and cleaning of the block and the internals. (IMG:style_emoticons/default/headbang.gif)
My question is with determining push rod length: Are you measuring the length of each push rod, or measuring the #1 intake and exhaust and cutting all the intake and all the exhaust push rods the same length? With turning the engine over and over by hand to get the correct push rod lengths you would assume it has wiped all the assembly lube off the cam lobes before you start the engine. (IMG:style_emoticons/default/WTF.gif) I sure as hell don't want this to happen again. |
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| adolimpio |
Sep 15 2021, 05:14 PM
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Art Group: Members Posts: 180 Joined: 10-March 10 From: Greenwood SC Member No.: 11,449 Region Association: South East States
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I determined the length of intake and exhaust on one cylinder and cut all according to this
What makes you think you wiped out the cam? |
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| Robarabian |
Sep 15 2021, 08:44 PM
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914 A Roo Group: Members Posts: 590 Joined: 11-February 19 From: Simi Valley, Kalifornia Member No.: 22,865 Region Association: Southern California
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Somebody chime in here... if memory serves correct, if you fried the cam, you would have no combustion / compression would be effected, ie., you would have no valve lift in intake or exhaust or both.
The oil pressure is driven by the pump with that groove in the camshaft end, through the galleys and bearing spaces. Unless you didn't use enough assembly lube, those surfaces wont just fry...unless the oil pump wasn't pumping or the machine work was really bad and the tolerances were too large to begin with. It may have had high pressure at start up as everything is still cold and thick and the larger bearing tolerances were pressurized with the thick oil. Ian is correct, the pressure will come down as it heats up. If you turn the key and it ignights, runs, revs etc, then it is not a fried camshaft. Unless you have 5-8 psi at idle and the oil light is on because of low idle pressure, I would look elsewhere versus the cam lobes. A quick compression test will answer that question. 10 PSI at idle would be okay on a warm engine, despite wanting more, it wouldn't kill anything for sure. Oil pump failure, weight of oil, bearing tolerance... those should be your search starts in my opinion. Anyone else? QUOTE(adolimpio @ Sep 15 2021, 04:14 PM)  I determined the length of intake and exhaust on one cylinder and cut all according to this What makes you think you wiped out the cam? |
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Posts in this topic
Geezer914 If you built a 2056 Sep 15 2021, 05:04 PM
Tdskip
Somebody chime in here... if memory serves correc... Sep 16 2021, 05:56 AM
Geezer914 It started out at 80lbs oil pressure and went down... Sep 15 2021, 06:25 PM iankarr That’s to be expected. As the oil heats up the p... Sep 15 2021, 08:33 PM Shivers Is that what made you think the cam was trashed, o... Sep 16 2021, 07:37 AM Geezer914 Drained the oil and cut open the oil filter . The... Sep 16 2021, 07:40 AM Shivers You are going to have during break in, lots of met... Sep 16 2021, 08:02 AM VaccaRabite Stop worrying.
You are doing CAM break in. As lo... Sep 16 2021, 11:59 AM Geezer914 Thanks for the confidence boost. Sep 16 2021, 02:10 PM jcd914 Cam break-in does not have any real effect on the ... Sep 16 2021, 11:58 PM |
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