So I adjusted the valves 1.5 turns past zero lash and they clacked like a SOB. So the. I looked up cranes recommendations as I have roller lifters. They say 1.75 turns past zero lash. I went back and did that and it is much better but I still have some clackers. I use to adjust 350s with some little covers placed over the lifters to keep oil from splashing. I know this would be a pain since you have to take the intake off twice to take the valve covers off and then put them back, but adjusting while running is the most accurate. My question is has anybody done it on a 2.8/3.4 and if so was there any hurdles/mess? Thoughts?

Paul

quote Originally posted by PAUL66: I know this would be a pain since you have to take the intake off twice to take the valve covers off and then put them back, but adjusting while running is the most accurate.

You might wish to look at this thread... It's true, 2.8 valve covers CAN be removed without removing the middle intake plenum! ...and in This post I give my advice on adjusting 2.8 valve lash.

Easiest and most foolproof way to adjust hydraulic lifters with the engine not running.. Loosen up all of the rocker bolts on all cylinders.. Now take out all the slack of every pushrod by rotating up and down until there is no movement. Turn engine 1/4 turn do this on all the pushrods again. Go another 1/4 turn do it again, and keep going on each 1/4 rotation until you have gone two full rotations. Now turn each rocker down 1 turn and you have achieved the perfect preload.

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[This message has been edited by Dennis LaGrua (edited 01-23-2020).]

If you are using roller lifters, did you also get the 5.85" length pushrods?
Also - what rockers are you using? If you are using full roller rockers then you may need the valve cover spacers I have because the clacking you hear may be from the valve covers.
If you are using GEN2 1.6 rockers then you should be good as far as clearance.

quote Originally posted by lou_dias: If you are using roller lifters, did you also get the 5.85" length pushrods? Also - what rockers are you using? If you are using full roller rockers then you may need the valve cover spacers I have because the clacking you hear may be from the valve covers. If you are using GEN2 1.6 rockers then you should be good as far as clearance.

Sorry I miss typed roller lifters, I meant roller rockers and they are stock ratio so stock pushrods as well

quote Originally posted by Dennis LaGrua: Easiest and most foolproof way to adjust hydraulic lifters with the engine not running.. Loosen up all of the rocker bolts on all cylinders.. Now take out all the slack of every pushrod by rotating up and down until there is no movement. Turn engine 1/4 turn do this on all the pushrods again. Go another 1/4 turn do it again, and keep going on each 1/4 rotation until you have gone two full rotations. Now turn each rocker down 1 turn and you have achieved the perfect preload.

That’s awesome, never thought of doing it that way but it makes perfect since. Thanks for the reply.