Posted by noncompos on September 25, 2007 at 10:12:46 from (65.100.58.57):
In Reply to: rod bearing? posted by INCase on September 24, 2007 at 19:29:29:
I agree 100% with Paul. I will add that loose rods (worn rod bearing) tends to have a distintly higher metallic clattering noise than loose mains, which tend to be a lower pitched deeper thumping sound. AS Paul says, rods tend to clatter when engine sitting (trans in neutral) and engine revved, clattering as engine revs pick up, and when engine pulling load and gas backed off, like cresting a hilltop. Mains tend to sound under engine loading( pulling). Cam bearings I have no experience with. I do find it unusual that pulling a plug wire didn't alter the sound at all if it was a loose rod (I assume you pulled all the plug wires one by one). But it's immaterial; I'd guess the engine was run too long with bad oil, and EVERYTHING needs to be checked. With sympathy, Bud
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