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How do I bleed the cooling system?
#1

Please tell me how you bleed the cooling system.
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Michael Sorbera

aka San Antonio Silver Bullet

2002 VW Beetle TDI

2004 Nissan Titan Crew Cab

2004 Cherokee 33ft Travel Trailer

1990 Mercury Grand Marquis

1993 Amazon Green 968 Coupe (sold)

2002 Speed-Yellow Boxster (sold)

1987 Slate Grey 944 Turbo (sold)

1987 Guards Red 944 (first Porsche - sold)
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#2

Mike,



On the top front of the engine there is a coolant line that has a bolt plug on top. Warm the car up to operating temperature and open the screw. When you have coolant flowing out the hole with very little air, close the bolt and have a beer.
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#3

I like the second part the best!
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Michael Sorbera

aka San Antonio Silver Bullet

2002 VW Beetle TDI

2004 Nissan Titan Crew Cab

2004 Cherokee 33ft Travel Trailer

1990 Mercury Grand Marquis

1993 Amazon Green 968 Coupe (sold)

2002 Speed-Yellow Boxster (sold)

1987 Slate Grey 944 Turbo (sold)

1987 Guards Red 944 (first Porsche - sold)
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#4

There is a write up at http://clarks-garage.com/shop-manual/cool-02.htm



If your coolant is more than a few years old I suggest changing before bleeding. It is only a little more work but quite a bit more mess to change the coolant.



I used a pressure tester to bleed the coolant, then started the engine and let it get to operatinging temperature at which time I turned on the heater so the all of the cooling system was active then opened the bleed valve again very carefully to allow the remaining bubbles to exit.



After researching coolant I decided to use Zerex G-05 because it was the right stuff and available locally. Next time I will use the premixed version to avoid all question of whether the right kind of water was used with it.



You can see the bleed valve in this picture where the top radiator hose connects to the engine directly above the blue clip.



[Image: dscn1663-640.jpg]



If you change the coolant, it is a good time to change the HCV, or at least a much better time than on the side of the road.
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#5

[quote name='sasilverbullet' date='Aug 3 2005, 08:55 AM']I like the second part the best!

[right][post="8328"]<{POST_SNAPBACK}>[/post][/right][/quote]



Yea, me toooooo, that's why I often put that as step 1 <img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" />
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#6

My problem is that I would never get past step 1 <img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" />

Unbeer now for almost 15 years..... <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" />

Silver BLT
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