I've been driving it for two years that way, I even drove it for 32 hours straight when I moved up here. Just keep it under 2500rpm. That's what's funny, I'm running 38.5" tall tires and I can squak em and it'll put you back in the seat. There is plenty of compression, and power. The valves are opening and closing fully. Today I matched up a pushrod out of my wagon and it is the right length.
When started cold, all pushrods are snug against the lifters and rocker arm nuts are where they belong with only a few threads showing out of the top of the nut(no where near bottomed out).
While cold, I can push the motor over 5000 rpms with no noise. However,once the truck is driven for about 5-10 minutes and reaches operating temperature, the chatter starts. Eventhough the gauge shows no drop in pressure this is when the pushrods are loose when inspected.
Once this starts, the truck retains good power and sounds fine at rpms below about 2500. When I push it over 2500, you can hear the valves floating. Also the chattering sound comes from all over, not just one individual cylinder.
What's funny is the more I think about it this is starting to sound like weak valve springs?!?
I really appreciate all of the suggestions!
Thanks,
Scott
