Noisy Valvetrain?
11-23-2003, 03:38 PM
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Noisy Valvetrain? I just finished my Forged 346 project and my valvetrain is a little noisy. Here is my setup:
Absolute Stage II heads(cut .030 by Jay)
Stock rockers
7.35 pushrods
Comp 224/228 Cam
Comp 'R' lifters
I have heat cycled the motor about 5 times then retorqed EVERYTHING. When I installed the rockers I took them to 0 lash by hand and then it took a tad more than 1/2 turn to get them to 22ft/lbs. I thought this would be perfect but to me it is a little noisy...but I have no knock retard(-0.1 max) so I guess that is a plus.
Should I go with a longer pushrod and then shim the rocker pedestal to lessen the noise?
Thanks
Josh
Absolute Stage II heads(cut .030 by Jay)
Stock rockers
7.35 pushrods
Comp 224/228 Cam
Comp 'R' lifters
I have heat cycled the motor about 5 times then retorqed EVERYTHING. When I installed the rockers I took them to 0 lash by hand and then it took a tad more than 1/2 turn to get them to 22ft/lbs. I thought this would be perfect but to me it is a little noisy...but I have no knock retard(-0.1 max) so I guess that is a plus.
Should I go with a longer pushrod and then shim the rocker pedestal to lessen the noise?
Thanks
Josh
11-23-2003, 03:55 PM
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Most of the aftermarket cams have a smaller base circle than stock. Unless your heads are milled you probably need a 7.40 long set of push rods.
Shims under the rockers is going the wrong direction for more lifter preload. That makes for less preload.
Shims under the rockers is going the wrong direction for more lifter preload. That makes for less preload.
