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Old 06-06-2010, 08:36 PM   #1
coulrophobian
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Default Valve adjustment 89 2.9

Does anyone know the specifics for valve lash adjustment on an 89 2.9L? I've just finished the break-in period after a top-end rebuild and seem to remember that it was 1 full turn after zero lash, but my Haynes says 4.5 after zero... THERE'S NO WAY THIS IS CORRECT!!! Please help.
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Old 06-06-2010, 09:38 PM   #2
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i think its half to three quarters of a turn after zero. there is an article in the tech section under head jobs that details it.
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Old 06-06-2010, 10:10 PM   #3
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Ah ok. I thought I had read it there but couldn't find it earlier. Thanks.
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Old 06-06-2010, 10:11 PM   #4
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One turn seems a lot. I always adjust 1/2 to 3/4 turn. It has worked out well for me.
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Old 06-06-2010, 10:17 PM   #5
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Just read it and it says 1 1/2 to 1 3/4 turns after zero. Not only have I finished the break-in period after rebuilding the top end, I hear a "knock" (not a "ping") at higher RPM and suspect that I might have one that is a bit loose. It's quite sporadic, so we'll see if this does the trick. Also, what do I re-torque the head bolts to after the break-in period??
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Old 06-06-2010, 10:48 PM   #6
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In my chiltons cold adjust it turn the screw out till you feel lash the back to touching then in 1-1/2 turns
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Old 06-07-2010, 12:19 AM   #7
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How about re-torquing the head bolts while I have the valve covers off? Hayne's says 22 ft. lbs., 55 ft. lbs. then an additional 90 degrees for rebuild, but just to re-torque after break-in. RE-TORQUE TO WHAT, HAYNE'S!!???
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Old 06-07-2010, 02:23 AM   #8
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I believe you just need to retorque the intake manifold after the warmup the teck library under 2.9 V-6 dont specify a retorque on the heads just the manifold.
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Old 06-07-2010, 10:18 AM   #9
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1-1.5 turns after 0-lash is what I remember...

I did the same procedure as what's in the tech library for head bolts on mine and never had any problems, just be sure you are using new head bolts:



Sounds like that manual would be useful to start a bon-fire with...
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Old 06-07-2010, 12:56 PM   #10
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Thanks Pete, I'll take your advice... especially the bonfire part!
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