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From: daw1@mhuxl.UUCP (WILLIAMS)
Newsgroups: net.auto.tech
Subject: Re: Valve Adjustment on 1975 Opel Manta (1900)
Message-ID: <421@mhuxl.UUCP>
Date: Fri, 3-Jan-86 08:17:41 EST
Article-I.D.: mhuxl.421
Posted: Fri Jan  3 08:17:41 1986
Date-Received: Sat, 4-Jan-86 03:22:02 EST
References: <715@abic.UUCP>
Distribution: na
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 27

> 
> 	How do you adjust valves on this beast?  The GM repair
> manual says to adjust them until there is no play between the
> rocker arm and the valve stem and the lifter.  Then tighten down
> one full turn.
> 	Me and a friend did this, and on some of the cylinders we
> were afraid we would break the bolt.  When we were finished we
> couldn't start the car.  We backed off on all the cylinders
> and finally it was it's old noisy self.


	I believe the engine should be running to do this! By tightening
down until there is no play(i.e., no valve chatter) and then an additional
turn you place the lifter's inner part about 1/2 way down its bore for
optimal operation. (What you did was tighten down so far that the valves
were probably never closing.)
	Of course the lifters could actually be shot(siezed or excessive
leakdown) and adjustment won't solve the problem. Also, the stuff sold
in cans claiming to quiet noisy lifters probably won't help either.

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