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I've read all the posts here about cooling systems.

I re-drained my system, and did the coolant as posted, in an effort to get the air out. After 3 mins of 2000rpm, then idle until the fans turn on, the fans never turned on!

I have also read all the fan testing posts. Yes both fans work, and the red to red/white or red/yellow works. I replaced the fan sensor in the radiator. And also the temp sensor. Still nothing.

We rebuilt the motor, and it runs perfect other than shutting down after about 20 min. Fans never come on, and heat never gets hot!

Has a new water pump, and almost everying is new.

Love to hear some advice. About to punt!

Also, my VW is a 1998. It has two hoses coming out of the air control valve. I see the diagram under the hood. I conected the lower hose to the small hose dashpot behind the throttle. Any idea where teh other one goes??(teh upper one)
 

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99 Restoration Dad
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I just flushed my daughters 99NB today! Drained the system filed and flushed and had great for the first time since we bought it. But then I drained and refilled with coolant/water and no heat. Front end its elevated making the expansion tank highest point. Hoping that the air will work itself out.
 

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Small hose to the side of the expansion tank needs to have coolant flow/be able to blow air through it. The passage at the engine plugs up with gunk often.

Not sure if you could easily run a piece of weed whacker/string trimmer line through the hose and open the restriction in the head?? It may get hung on the nipple from the engine?

http://newbeetle.org/forums/2-0-liter-gas/72593-coolant-boiling-overflow.html

http://newbeetle.org/forums/2-0-liter-gas/60018-can-someone-please-solve-my-overheating-engine-problem.html
 
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