cant see why the longer pushrods ?? orig are 6.248 and you go to 6.400 ..stock heads stock pedestal does not need longer pushrods..?? i did mine 20-22ft lbs but with half turn, TFS Cam, stock length pushrods....
I question if shims will solve anything. When shims are used on these pedestal type rockers, they reduce lifter preload. If you have a noisy valve train, that suggests not enough lifter preload, usually.
Also, I think if the pushrods were too long, it might not allow the valves to close fully. That would make it difficult to even keep the engine running at all, ot if it did run it would be running very poorly.
Check the rocker arm to spring retainer clearance closely. It's possible for there to be a mismatch in parts compatibility going on.
So I went to try a slightly different procedure last night, turn the rocker bolt until you feel the slightest drag on the pushrod, tighten the bolt until the rocker is seated on the head counting the turn(s) & torque to 20 ft lbs. Cylinder 1 took 3/4 of a turn to seat but when I went to torque it it was already past 20. Cylinder 2 I could barely get it to 1/2 a turn & the bolt was quite tight, past 20 ft lbs I'd say.
Based on this description you wrote here, it sounds like the pushrod length is in the proper range.
Are you sure once the engine is running that all of the lifters are actually pumping up with oil pressure?
You could check by running the engine with the valve covers removed. Then verify oil dribbling up through the pushrods and across the top of the roc
Based on this description you wrote here, it sounds like the pushrod length is in the proper range.
Are you sure once the engine is running that all of the lifters are actually pumping up with oil pressure?
You could check by running the engine with the valve covers removed. Then verify oil dribbling up through the pushrods and across the top of the roc
I'm not sure I follow the procedure you did... are you saying that you hit zero lash BEFORE the rocker even touched the head, tightened until the rocker seated, then torqued to 20ft/lbs? The correct procedure is find zero lash then torque to 18-20 ft/lb's, making sure to do so in 1/4 to 1 turn. There is no "seating" the rocker.. unless you do so in the 1/4-1 turn it takes to hit 18-20ft/lbs.
cant see why the longer pushrods ?? orig are 6.248 and you go to 6.400 ..stock heads stock pedestal does not need longer pushrods..?? i did mine 20-22ft lbs but with half turn, TFS Cam, stock length pushrods....
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