99 5.3L to a 06 5.3L

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Nov 9, 2009 | 02:28 AM

#11

GMCtrk

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If they were really milled that much I'm surprised it didn't destroy the lifters

Nov 9, 2009 | 09:07 PM

#12

ForcedTQ

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Quote:

Originally Posted by GMCtrk

You do realize that the lifter can accommodate varying length's of pushrods, correct? Pushrods aren't even close to the issue here. It's just a bad tune and as already pointed out, possibly an injector issue which would throw everything off.

You do realize the lifter plunger does not have an infinite amount of travel, right? If the pushrod bottoms out the hydraulic compensation plunger in the lifter it will be essentially a solid lifter, which would effectively not allow the valve to close. Stock lifters have about .150 of plunger travel, and with non-adjustable valvetrain, could easily be eaten up by a severely decked set of heads and too long of pushrods. I wasn't telling the O.P. that pushrods were the issue, just giving him backup on making sure he needs to rule that out as the problem.

Last edited by ForcedTQ; Nov 9, 2009 at 10:03 PM. Reason: wrong interpretation

Nov 9, 2009 | 09:09 PM

#13

GMCtrk

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Quote:

Originally Posted by ForcedTQ

All right there smart guy, you do realize the lifter plunger does not have an infinite amount of travel, right? If the pushrod bottoms out the hydraulic compensation plunger in the lifter it will be essentially a solid lifter, which would effectively not allow the valve to close. Stock lifters have about .150 of plunger travel, and with non-adjustable valvetrain, could easily be eaten up by a severely decked set of heads and too long of pushrods. I wasn't telling the O.P. that pushrods were the issue, just giving him backup on making sure he needs to rule that out as the problem.

I wasn't trying to be confrontational. Sorry if it came off that way. Posting from the Iphone doesn't lend itself to wordy posts.

Anyways, you'd have to absolutely do a massive milling of the heads before you ever ran into pushrod problems.

Nov 9, 2009 | 10:05 PM

#14

ForcedTQ

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Quote:

Originally Posted by GMCtrk

Post edited to show that.

Armchair diagnostics are sometimes helpful, but if we're not there we can't be of too much help. Really need to be there to hear see and feel the issues, that is the best way to do it. I sometimes wish teleporting was available just for diagnostic and repair issues.