RE: Overheating in Traffic was: I hate N.J. (or at least their highways!)

[David Liu <dyliu@pacbell.net>]

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yeah, lots have been said already -
1. check for leaks! (an air-cooled engine that's supposed to be 
water-cooled is disastrous! - i just saw an old buick that burned to the 
ground yesterday on 101S) - tberk said it well...
2. just like gary said, clogged radiator...
3. thermo switch - is/was it necessary to replace so many switches? can't 
you test is with an ommeter before trashing it, just to make sure your 
getting the right reads..?
dave

At 11:07 AM 11/30/99 -0500, Gary Huff wrote:
>Forgot clogged radiator, my 8v had that problem :)
>
>-----Original Message-----
>From: T Berk [mailto:tberk@mindspring.com]
>Sent: Monday, November 29, 1999 10:29 PM
>To: JLuk77@aol.com
>Cc: scirocco-l@scirocco.org
>Subject: Overheating in Traffic was: I hate N.J. (or at least their
>highways!)
>
>
>JLuk77@aol.com wrote:
> >
> > Sorry i just have to rant, i spent about an hour last night in traffic...
> > and i almost always start overheating.  ...i have put 3 or 4 radiator fan
> > swictches in it so far at least one of them low temp, and they have all
>died
> > within 3-4 months, i think i might need a new fan motor, does this seem to
> > make any sense to those of you who are better with electical theory than
>I?
> > TIA
> > Josh Lukasik
> > 88 16v 2.0
>
>Our cars should not overheat at all. They often do though and this is
>the hard bite.
>
>Things to check;
>Air bubble stuck in block due to not backfilling coolant mix during
>refill. use the upper radiator hose to fill the block.
>Small leak in system, prob only when up to full temp, that won't allow a
>full 15psi coolant pressure. This will allow the boiling point of the
>mix to lower closer to 100c. Not good. Higher pressure = higher boiling
>point.
>Water pump worn and coolant not flowing well, under speed there is
>additional cooling going on.
>Fan windings/Ext wires _could_ be raising the resistance high enough to
>burn out the weak link; the thermo switch. (You can rewire it directly
>to the battery neg - switch - fan - battery pos if you like) But, if the
>fan is running most all the time to keep the motor cool then the switch
>may just being wearing out due to a too high duty cycle, ya think?
>
>Questions for ya, esp as we go into the Winter in the N Hemisphere
>Coolant flush & renewal?
>Thermostat was replaced then too, right? With a good OEM brand?
>Coolant is rather fresh & is 70/30 to 50/50 mix w/ distilled water,
>right? (Phosphate free if you redo it)
>Your car ever go into the shop? One with equipment to sniff the exhaust
>and properly set the fuel to air mix? What about your timing? Might be
>off.
>
>Thems my thinks, Fellas did I get it all?
>TBerk
>
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