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Vanagon overheats
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prhoades
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Joined: January 14, 2004
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PostPosted: Sat Oct 11, 2008 8:20 pm    Post subject: Vanagon overheats Reply with quote

I just bought an 89 Vanagon that overheats. It has bubbles in the resevour. If these thngs overheat, what does it do to the motor?
Thanks
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Wildthings
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PostPosted: Sun Oct 12, 2008 12:39 am    Post subject: Reply with quote

If the pressure tank is full and the system well bled and you still get a continuous stream of bubbles into the reservoir you may have a compression leak into your cooling system. Likely caused by a cracked head or blown interior head gasket.
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Terry Kay
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Joined: June 22, 2003
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PostPosted: Sun Oct 12, 2008 8:07 am    Post subject: Re: Vanagon overheats Reply with quote

<< If these thngs overheat, what does it do to the motor?>>

Fries them..
That aluminum squirrel cage does not enjoy being run hot---

Bubbles in the expansion tank = compression leak.

It could be coming from a cracked head---bad compression ring, etc.

Get a coolant pressure tester on the expansion tank--it'll tell you right away where the leak is.
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Vanagon Nut
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PostPosted: Sun Oct 12, 2008 9:27 am    Post subject: Reply with quote

A long shot but.....

Was the cooling system opened up (worked on) *just* before you bought it?

On my I4 conversion, there were little random bubbles coming into the expansion bottle. (the cooling system was new, and just filled up). Naturally I was worried it was air being drawn in at head etc. Turns out air introduced to the cooling system can take some time to work out.

No bubbles now.


Neil.
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50 ABA Swap in to '88 Westy: http://tinyurl.com/yap5hpwt

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https://tinyurl.com/2f24rmh

VE7TBN
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