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10/13/2021 8:20 AM  #76

Re: 351W rocker clatter

John Ha wrote:

Probably something loose and rattling on your engine stand

It’s not. Clearly coming from the engine and I have had other engines on the run stand with out noise.


10/14/2021 5:17 AM  #77

Re: 351W rocker clatter

I'd try removing the plug wires one at a time while it's clattering to see if that affects the noise.  If it does you should at least have the issue narrowed down to a cylinder.  The only other thing I can think of to look at would be the rockers - making sure that all the valves are pushed down the same distance when the clattering is present.  I think you've eliminated the heads as the cause so it either has to be something deeper in the valve train (cam, lifters or push rods) or something else that moves.

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