This is topic The source of my knocking sound in forum Tech Talk at Northern California Ford Owners  .


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Posted by N8 (Member # 6048) on :
 
Well I tore everything down got the valve cover off (drivers side). And this is what I found (check pics). Sorry the pics arent great. But the rocker on the driver side by the firewall, seems to be out of place, like it is flat. How bad is that? Advice please.




 

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Posted by whitelx91 (Member # 8317) on :
 
Man i cant tell whats goin on with these pics see if you could take some more less bright ones. Also bring that rocker to the flat on the cam.
 

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Posted by N8 (Member # 6048) on :
 
ill try to take some better ones tomorrow. But the rocker in question is in a visibly deformed position. And it happens to be the one in the area of the noise.
 

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Posted by 1991 SSP 331 TWIN TURBO (Member # 7840) on :
 
Can u move it around? I would say broke pushrod, or bad lifter
 

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Posted by N8 (Member # 6048) on :
 
I didnt try too hard but no it cant be moved by hand I would say.

ill see about better pics tomorrow
 

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Posted by 90gtvert (Member # 8697) on :
 
could be a stuck lifter i guess...just gott check it out
 

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Posted by 89goose (Member # 7196) on :
 
from my experience with this issue - on my 289 it was doing that on several rockers - the problem was a a combo of bad lifters and warn lobes on my cam.
i would suggest changing the lifter and see , fi not make sure the push rods are same length, and if still the same - might looking into a new cam. look at it on the bright side - youll have a new cam,lifters and possibly pushrods

hope this helps
 

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Posted by N8 (Member # 6048) on :
 
update, ended up being a floated valve. Replacing the suspect valve shortly.
 

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Posted by whitelx91 (Member # 8317) on :
 

quote:

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Originally posted by N8:
update, ended up being a floated valve. Replacing the suspect valve shortly.

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