RPM Airgap

Blind Squirrel said

That's the thing. In the pictures he provided it "appears" there is around a 1/16th of an inch difference. Pushrods of an incorrect length can cause either a lack of preload on the lifter (noisy valve train) or the opposite and bottom out the lifter in its bore. It appears you may have a make it run get it down the road rebuild. Not a huge deal if that is what you expected.

Just for S&G can you post a pictures of the top several of the valve tips. I'd like to see the wear pattern.

Click to expand...

Your correct that length, even a little can matter. But you also have to consider the measurements were taken using a tape measure. Not a very accurate way to measure them. I can understand the OP did it that way because he probably doesn't have a caliper long enough to measure them with. Since he said it has ran good with this configuration for 2 yrs. it seems to me it's not a big issue. It's quite possible the proper length would be somewhere in between the 2 and there's enough tolerance there to allow them both to work