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RE: 90q heater core --- symptoms and BTDT?
This is a bit of an easy way out, but what the heck it worked for me. I
had a similar problem with my '91 90Q 20V. Humidity in the defrost air
and the smell of antifreeze. Before I went through the time and expense
of digging into the heater core, I invested in a $3 can of Barr's Leak
(the stuff you dump in your radiator when you spring a leak). It
worked! Worked so well I never had the problem again for the next two
winters that I owned the car. I never did actually inspect the core for
the leak, so it possibly could have been leaking elsewhere. But the
quick-fix worked that time. I figured I had nothing to lose other than
$3 -- which ended up saving me a lot. Good luck.
> -----Original Message-----
> From: Andrei Kogan [SMTP:firstname.lastname@example.org]
> Sent: Friday, November 06, 1998 2:28 PM
> To: email@example.com
> Subject: 90q heater core --- symptoms and BTDT?
> I think we got a leaky heater core, or something in there. I would
> like to
> order it and do the work next weekend, and have a couple of questions.
> 1. Is my diagnosis right? When I turn on the heat, I can smell
> and the windshield fogs up. The problem is, I don't see any physical
> and the level doesn't drop noticeably. Maybe, it's a very small leak.
> 2. I would kinda like to get the core before I start, so I don't have
> wait for it with the car disassembled. However, I wonder if there are
> parts in there that are likely to leak coolant. Connecting hoses, for
> example. Can I be pretty sure that the core itself is the problem or
> I take the dash apart first and see what is wrong?
> 3. What else should I replace along the way ? Foam, gaskets, o-rings,
> some such items? I have no idea what it looks like inside, any
> I heard many people experienced problems with rotten foam which either
> allowed heat to escape from the vents before delivering it to the
> compartment, or allowed the hot and cold air to mix.
> 4. How do I wash off the nasty stuff that ended up on the inside of
> windshield while we ran the heater for a little while? I am presuming
> the antifreeze vapor deposits, nasty, nasty greasy stuff which make
> the car
> inoperable at night because of glare. I tried windex with no luck.
> 5. It seems that the 80/90 heater is a weak point, compared to the 4k.
> haven't seen any posts regarding the 4k core leaks, yet for 80/90
> there are
> plenty, and those are newer cars.
> 6. Anyone who worked on the heater core in the 80/90 (ours has A/C)
> let me know if there are any special things to watch out for. If
> anyone has
> a step-by-step procedure, that would be great!
> Many,many thanks.