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Old 09-26-2011, 03:02 PM
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Default vw valve clearance

I set the clearance on my 1600 type 1 at .006 now its noisy as *$%?. The book told me that was correct. The local vw dub shop says .003 whats correct.

It ran quiet until I changed it. I had to removed a head. I would like it quiet but I don't want to snap a valve.
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Old 09-26-2011, 04:02 PM
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.003 was factory spec; anymore all valves are .006 just for safety sake. It shouldn't be noisy - just a gentle 'click click' if anything. Are you sure you did them in the correct order, i.e. they were both at the closed position at TDC?
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Old 09-26-2011, 11:01 PM
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went to TDC #1 both intake and exhaust closed then adjusted them rolled to #2 both closed set 3 then 4 same way I made sure there was no pressure from cam on valves then adjusted them.
it clattered but not that loud i can't stand hearing valve clatter.
It was loud to me.
It had no valve clatter before.
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Old 09-27-2011, 08:27 AM
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Hmm.. there will always be a little noise from the valves. Drive it for a while and see if it doesn't diminish after it warms up. The factory spec has pretty much been panned with the advent of newer metals being used in the engines. .003 was deemed as too tight when the motor reached temperatures and there were stories of the valves hanging or being bent from the clearances. If it still rattles after reaching temp, set them down to .005. I wouldn't go much lower than that. It's also possible your cam or pushrods are wearing beyond spec.
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Old 09-27-2011, 02:31 PM
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the motor has only 18531 miles on it. The former owner put a mild cam in it and 90 mm jugs on it as well

Last edited by delbertinie; 09-27-2011 at 04:29 PM.
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Old 09-27-2011, 03:46 PM
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180K miles??? And it's never been torn down?? Well... let's just say that you're 130K past a rebuild. In most cases, VW aircooled engines need to be torn down to the block and gone through at 50,000 miles. That's pretty much the tipping point where stuff starts to wear and cause clearance issues, especially if it's been modified. If it were a bone stock engine I'd tell you to leave it alone... I'm still gonna say leave it be, but check the compression and oil pressures through a reliable (read: mechanical) gauge. If everything there checks out, deal with the valve noise. Tuning them tighter might cause issues later on.
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Old 09-27-2011, 04:28 PM
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sorry about the goof 18531 not 180531. stupid mistakelol
its just getting broke in. The 74 bug was rolled over at 18000 miles. The pan went to the frame shop and vw villiage tore the motor down put a mild cam in it and 90mm pistons and jugs new bearings and reassembled it. He put 531 miles on the vdo speed/odometer 1975. And it had not ran until I got it. 2011
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Old 09-27-2011, 05:15 PM
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No problem! I'd still leave the clearances at .006 and drive it a while to see if it don't 'set' a little quieter. If it's been sitting for that long I'm sure that some things need to loosen back up and re-seat.
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Old 09-28-2011, 08:59 AM
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If I bought an engine that sat for 36 years without being ran I would have pulled the heads and check for moisture damage.(valves staying open for that long is not good) If everything looked good I would have then pressurized the oil system before cranking it over. There maybe other issuses with the motor and those are the sounds your hearing.

Brett
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Old 09-28-2011, 09:27 PM
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Already pulled the heads looks great, relapped the valves. Put new valve springs in. The cylinders have no groves and really clean no carbon to speak of. It has great compression. Even pressure between cylinders. 135lbs the highest 133lbs the lowest and 60 lbs of oil pressure. No slop in the bearings when i move the crank back and forth. Runs fine other than after I readjusted lash to to .006 its a littlle noisy. It had no lifter noise before I readjusted the valves. Just rebuilt the carbs twin 44 mm solexs. very clean oil ( golden color) looksand feels like straight 30 weight not shure.
by the way what is an aircooled supposed to run as far oil weight.

Last edited by delbertinie; 09-28-2011 at 09:32 PM.
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