Quick question about setting/adjusting hydraulic valves.

[timped2006]

Hey, fellas. Just want to make sure I'm setting my hydraulic valves correctly. 2.0L FI type IV. I read everywhere about turning the screw until it touches, then going 1.5 turns more. My question/assumption is...do I hold the rockers tight against the push rods to get the slack out while I turn the screw in?

Muir says to do that for solid lifters, but all I ever find about hydros is that "you never have to adjust them." So much for that.

Thanks.

[sonofamitch]

I backed the adjuster screws all the way out and then adjusted each valve by screwing in the adjuster until there is no lash (you can't move the rocker arm back and forth between the pushrod and valve). Then I'd tighten each screw an additional 1.5-2 turns. The Bentley says to get each piston on TDC before you adjust the valves for that cylinder. This is a pretty good read

http://www.type2.com/library/engineg/hydral.htm
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'77 Westy 2.0L FI

http://www.thesamba.com/vw/forum/viewtopic.php?t=568454&highlight=

[timped2006]

Thanks. That answers my question. I just wanted to make sure that by forcing all of the slack out before tightening the screws 1.5 turns, I wasn't going to hold a valve open when it wants to close.

[Wildthings]

Back the screw out and then turn it is gently just using your fingers, the point of contact can be very subtle and you may miss it using a screwdriver. No, you do not want to press in on the bottom of the rocker as that will compress the lifter if it has air in it thereby throwing the adjustment off.

[timped2006]

Just looking over this again and I had one more question.

Do these have to be done "cold" so the lifters won't be pumped up? Does it matter? Thanks for the help.

[Wildthings]