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update on the piston slap story 200

posted by  1pocket on  Thu Nov 3 08:36 CST 2016
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1. i pulled the plugs and found them wanting in age and twice the normal gap

installed new plugs gapped correctly


2. changed the oil to 10w40 with a fresh filter and added 6 oz of lucas oil treatment (i know its a stop gap, a band aid if you will.. nevertheless even band aids have their place)

restated the engine and the piston slap which was ridiculously loud and lasting is now normal in sound and lasts under a minute before quieting considerably before all but disappearing at full warmup.

out of curiosity i started the engine with only 3 plugs firing x 4 times... 1-4 and find that #3 cylinder appears to be the overwhelming bad boy. since they move in pairs i expected #1 to be a cohort but found it was #4 which added a tiny bit of the slapping noise. this seems odd to me since oil flow in this engine begins at #4 the back of the block and moves forward. i would have thought it would opposite.

on a side note non sequtir i found water pump and power steering pump too noisy due to over tightened belts. this IS cautionary tale for shortening the life of both.






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New 1 rod knock versus piston slap [200]
posted by  1pocket  on Mon Oct 31 18:44 CST 2016 >


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