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Re: Comp Lifter Noise/Clacking at 2k RPM Symptoms/Questions
[Re: kz5rt2]
#759438
08/03/10 01:30 PM
08/03/10 01:30 PM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
-UPDATE-
I took the valve covers off over the weekend to replace the gaskets as they weren't sealing as well as trying to check out the lobes on the cam. I zeroed the pushrods and applied another 1/2 turn on the rocker adjustments as a friend was rotating the engine. After all that was done, I put on the new rubber/cork gaskets and started it up. The noise was worse than ever! The valve cover gasket walked in when I tightened down the bolts as well. So I tore them back off and I noticed the adjustments on the rockers were hitting the baffles. This must have been my noise I was hearing around 2k rpm and during transitions, not sure why this rpm range and not idle. I also took out the distributor to look at the front two lobes on the cam which appeared to be okay.
I beat the baffles down a bit, put the covers back on and it's quiet. I'll be monitoring it for now.
 hope thats sloves your problems. Heck, at least it beats having a wiped out cam lobe.
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Re: Comp Lifter Noise/Clacking at 2k RPM Symptoms/Questions
[Re: eightlitermopar]
#759441
08/04/10 09:33 AM
08/04/10 09:33 AM
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Joined: Aug 2009
Posts: 121
Detroit, MI
kz5rt2
OP
member
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OP
member
Joined: Aug 2009
Posts: 121
Detroit, MI
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Quote:
Which valve covers are you running?
I currently have the XE cam in my 383 and I do have the "dull sewing machine" noise while driving as well.... I've just accepted it although it annoys me at times 
I am running chrome 426 street wedge valve covers.
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Re: Comp Lifter Noise/Clacking at 2k RPM Symptoms/Questions
[Re: Banzaiii67]
#759444
08/04/10 01:03 PM
08/04/10 01:03 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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Which lifters did you run? You may want to make sure you don't have too much preload on them now. The 822-16 (stock type) lifters should want the normal .030-.050" preload.
The 867-16s (anti pump-up) only want .010".
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Thicker valve cover gaskets work also 
