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missing bolt on top the throttle body?

 
Old 03-09-2004, 04:56 PM
  #1  
AlphaOne
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Default missing bolt on top the throttle body?

Im currently in the middle of a major coolant leak crisis when I noticed a
burt out spot on my engine hood heat shield (bit silver thing on the
underside of the hood). it was right above the thottle body, where I
noticed a hole. With the engine running, i plugged the hole with my finger,
and the engine seemed to smooth out a bit. anyone know what goes here? a
screw i imagine, but why would it be missing?

thanks for any help?
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Old 03-09-2004, 04:59 PM
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BoostGuy951
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Thats the Idle adjustment screw. It allows you to adjust the idle speed. I don't know the size of it, sorry.
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Old 03-09-2004, 05:03 PM
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AlphaOne
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well, that would explain my abnormally high idle this winter. thx
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Old 03-09-2004, 05:44 PM
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turbite
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Yeah, they tend to back themselves out.

Someone just posted a few days back that you can stick gum or something of that sort on top to keep it from backing out. Do a search.
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Old 03-09-2004, 05:59 PM
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SamGrant951
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Also you can use a paint (fingernail polish crap), will hold it better and will also ballpark where it was set at.
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Old 03-09-2004, 07:07 PM
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Aleks951
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https://rennlist.com/forums/showthre...hreadid=118784

Here is the link from the thread I posted. I was informed that you should use the correct screw, o-ring (IIRC) and you may keep it from backing out by using some blue loctite. I still have that gummy tar-like junk on mine for now.
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Old 03-09-2004, 08:57 PM
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944Fest (aka Dan P)
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This may be a hard part to replace.. the dealer won't do it for reasonable $$.. BUT I remember reading a tech article about this and there is a VW part # that is the same. I'm at work now, but I'll search when I get home and post the part #. The same thing happened to me.
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Old 03-09-2004, 09:12 PM
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Danno
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That's the idle-adjustment screw:


Part# 930.110.919.00 and I bought one for about $4.82 from my local dealer.
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Old 03-10-2004, 12:35 AM
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Aleks951
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Danno is there an o-ring that goes in there with the screw? What is the best way to secure the screw so that it doesn't back out again? Is Loctite good or is there something even more reliable or better for the application?

thanks!
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Old 03-10-2004, 01:11 AM
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Danno
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It actually comes with an O-ring. Problem is the O-ring gets compressed over time and doesn't seal anymore. Then the bolt vibrates free! I'd use very measure possible to secure that thing! Loctite, tape, glue, drill a hole in the side and safety wire in place! I've seen a couple of cars with the hole siliconed over as well.
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Old 03-10-2004, 01:26 AM
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Aleks951
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OK - I just tack welded it into place!





.....just kidding!
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Old 03-11-2004, 07:11 PM
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Dave E
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I had to buy a normal bolt and grind the head to be a little thinner, and I ground a cone shape on the other end, like the stock one. To lock it, I used a nut, which had to be ground too, to be a jam nut.
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Old 03-11-2004, 09:06 PM
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Dave Sims
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Part number is VW # 035 133 432A (about $14)
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Old 03-11-2004, 11:02 PM
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If you have a one with a new O-ring it will stay in place for about another 18 years. I'm surprised your engine wasn't running really badly with it missing, mine sure was.
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Old 03-12-2004, 03:11 PM
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rhesus
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my mechanic got me one with an o-ring for $2-3
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