Valve Lash Adjustment

wazoo64 said
You would hope there are no metal shavings after a new build like this. My gut says its a bent push rod or just some minor adjustment needed. If I do replace the pushrods what should I use? Also I have access to small flexible scopes to explore the inside without a teardown. Has anyone ever done this? Curious if I can get to the cam with a small scope. I would like to rule out any damage to the cam as well.

There shouldn't be an metal shaving unless there is a problem where either the cam, lifters, and/or pushrods have a problem. I mentioned it because you have a valve train problem of some sort so you need to make sure there isn't any trash floating around in there that will eat the bearings. On a flat tappet cam it's easy to pull the lifters out using a heavy duty magnetic pick up tool then you can inspect the lifter and cam lobe. The problem is you have roller lifters that are tied together with a bar which will most likely make that impossible. Talk to your engine builder as to what pushrods to use. He knows what the rest of the setup is so he should be able to recommend what's best. He should also know what length pushrods he used which is something you'll need to know when you order them. You can try inspecting with the flexible scope. Don't know how much luck you'll have but it can't hurt. BTW: if you have an extra one of them feel free to float it my way. LOL

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70dart340 said
With the increased pushrod angle caused by taller roller lifters, check to make sure the pushrods aren't rubbing the heads in the pushrod holes. I had to open up my holes in the heads to prevent this.

I've heard of a few other guys having to do this when using roller cams. If one of the pushrods did contact the head it's possible one is bent.