thanks for the help on overheating 100q

[Brett Dikeman]

At 12:58 AM -0400 8/7/04, Stpndsmnn at aol.com wrote:

>The water pump was sounding buzzy like a failing shaft or something like
>that,  obviously still turning just making noise....

Was it changed with the last t-belt change?  Also, some coolants 
heavy in silicates will wear water pumps, which is why Japanese auto 
companies will not warranty an engine run on silicate coolant. 
Pentosin really is good stuff, and not -that- expensive for something 
you change every 1-2 years.

>      If I fill up the coolant
>bottle and then rev the engine a bit within a couple minutes the bottle starts
>to overflow and bubbles come out but not tons of bubbles just a few big
>ones...

A leaking headgasket will cause nearly immediate rise in the tank 
when revved, if I'm not mistaken.

What you described sounds exactly like a boilover.  The coolant 
system is designed to operate sealed and at pressure, not open- and 
if left open it will boil over.  Fill the system with the proper 
water-coolant mix, set the CC unit on ECON w/HI temp.  Let it warm up 
until the thermostat opens and you've got obvious coolant flow, then 
cap the system.  Drive.  You may need to top it off as any remaining 
air is purged.

If it still overflows, yeah, you've got a problem.  Even though you 
said the fan was coming on and the temp gauge did not show high 
temps- if you have an '89, inspect the fuseable link just back from 
the expansion tank; they corrode, snap, etc.  Press on it with a 
screwdriver with the A/C on (which should run the fan on low speed 
all the time) and so on.

Brett
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