Date: Tue, 9 Jul 1996 23:00:16 -0600
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>From: tmarcini@execpc.com (Tim Marciniak)
>To: Multiple recipients of list <vanagon@lenti.med.umn.edu>
>Subject: Re: Overheating, '87 Vanagon
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>>
>>To:tzallen@uniserve.com
>>From:tmarcini@execpc.com (Tim Marciniak)
>>Subject:Re: Overheating, '87 Vanagon
>>
>>>I request some help with what has turned out to be a chronic problem of
>>>overheating on my '87 vanagon. When driving at sustained speeds on the
>>>highway, everything is fine for a while. Then the red warning light on the
>>>temp guage starts to flash and the temperature starts to rise. I pull over
>>>and check the engine. the coolant seems to be boiling and overflowing into
>>>the "overflow" tank. It fills well over the cap and starts to come out. I
>>>release some of the pressure and the engine cools down if I drive at lower
>>>rpm, say 3000. The temp rises again when going up hills or if I let the
>>>rpms creep up.
>>>
>>>In town, the red warning light often flashes, but there plenty of coolant
>>>and the engine temp doesn't seem to rise above half way on the guage.
>>>
>>>I have been to the mechanic several times. There are no apparent leaks, no
>>>apparent combustion of coolant (actually it doesn't seem to lose coolant).
>>>He has changed the thermostat, the thermostat housing and says everything is
>>>ok, but it isn't. It works for a few days than it acts up again.
>>>
>>>Any ideas? I have had problems with heads and head gaskets, could this be
>>>related? Is exhaust gas getting into the coolant? What tests are
>>>available? Help.
>>>
>>>Tom Z.
>>
>>Tom,
>>
>>Has the cooling system been bled of air? Is your coolant fresh or is it a
>>couple of years old? When was the last time the cooling system was
>>flushed? BTW if I'm not mistaken the red warning light signals a low
>>level of coolant in the expansion tank and not an overheating situation.
>>In your case the cooling systen is overheating because your temp gauge is
>>going up and you have boil over so it sounds like you need to rule out if
>>you have enough coolant in system, properly bled of air, and coolant is
>>fresh.
>>
>>Good Luck
>
>Tim Marciniak tmarcini@execpc.com
>90 Westy Multivan
>
>
>.
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