How do you get all the air bubbles out of the cooling system?

Asked by Jan 24, 2007 at 10:26 AM about the 1983 Volkswagen Vanagon

Question type: Maintenance & Repair

engine runs hot at idle and cool air from heater... fast idle and engine cools down and hot air from heater. trying to get the air out of the cooling system after flushing system.

1 Answer

20,820

As you have no doubt encountered, shadetree, specific information for your Vanagon isn't easy to come by. Here are some general tips for bleeding a cooling system from popular mechanics. This should get you pretty far down the road and give you some specific questions to ask if you need to call your local VW dealer. Good luck! : "Let it bleed Now comes the hard part–filling the system. If the system holds 12 quarts, you want to install 6 quarts of undiluted antifreeze, or exactly half of the cooling system's capacity. The cooling system has lots of nooks and crannies that trap air, making it difficult to fill the system with coolant. The fill cap and neck are supposed to be at the high point of the system to help air bleed out, but often they aren't. And even if they are, you need all the natural help you can get. So jack up the front of the car, which gets the coolant fill neck as high as possible. Check for air bleeds on the engine. Sometimes you'll see an obvious air bleed, such as a boltlike item threaded into a hose. If there's an air bleed, open it. If there are several, open them all. If you have access to a factory service manual or PM CD-ROM for your car, check it for a coolant fill procedure. Pour in the required amount of antifreeze slowly until you see coolant oozing out of the open air bleeds. Then close the bleeds and top off the system with the remaining antifreeze and then plain water. If the system has a heater coolant valve, close it by moving the temperature control lever or knob to cold. With the engine running at fast idle and warmed up, have a helper move the lever or knob to hot while you listen at the coolant valve. If after the first rush of coolant you hear a continuous gurgling noise, there's still air in the coolant, and you should be prepared to watch the coolant level in the reservoir over the next few weeks."

5 out of 5 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Air bubbles 1 answer

    I got a volkswagen microbus 2.6lt, 1996 model. How do i get rid of all the air bubbles in the cooling system. Some guys told me that the engine must be higher than the radiator, some told me the rad...

    Volkswagen Vanagon

    -

    Maintenance & Repair

  • I own a water-cool Volkswagen Vanagon GL 1990. Is it ok to mix different types of antifreeze? 2 answers

    Any honest response would greatly appreciated. Thanks.

    1990 Volkswagen Vanagon GL Passenger Van

    -

    Maintenance & Repair

  • batt and oxy light stay on. 1 answer

    1982 air cooled westy runs good new battery had oxygen sensor replaced 2 years ago. Motor has less than 1000 miles on it.I cannot figure out why the batt light and oxygen light on the dash will not ...

    1982 Volkswagen Vanagon

    -

    Maintenance & Repair

  • Why does my clutch push to the floor on my 85 vanagon westie after being in the garage for the winter?! Help? 2 answers

    I parked my van in the Garage for the winter, she ran fine going in, and now the clutch pushes to the floor in the spring! Plenty of fluid ( min line) under the instrument cluster and no visible le...

    1985 Volkswagen Vanagon

    -

    Maintenance & Repair

  • Coolant 1 answer

    I have heard that you need to use a very specific coolant in the 1991 VW Vanagon otherwise you will have serious engine issues. Is this true? I am about to buy one (v.excited) and a am a bit short o...

    1991 Volkswagen Vanagon

    -

    Shopping & Pricing

Search Volkswagen Vanagon Questions

Volkswagen Vanagon Experts

#1 Scott Sr.
Scott Sr.
Reputation 830
#2 Ryan Redenbaugh
Ryan Redenbaugh
Reputation 250
#3 chassy
chassy
Reputation 200
View All

Related Models For Sale

Used Toyota 4Runner
406 Great Deals out of 20,535 listings starting at $2,499