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Coolent system upgrade questions
Perhaps it is as simple as a ground on your gauge or the gauge itself,
instrument cluster water temp gauges on cabrio's for example are notorious
for indicating a water temperature than actual, I may suggest you install a
vdo gauge that indicates actual temp range (much like your oil temp gauge)
to see if indeed you actually have a temperature issue, at the very least
you will have aq much more accurate reading on where the actual temperature
stands at.
BTW another solution you could consider is an actual oil cooler (external)
if you don't have one, I know that it lowered my 120'c oil tempo to
105-109'c year round (up to 115'c at 90 for 20 minutes) and my water
temperature dropped 10'c with it (I think the OEM oil cooler transfers too
much oil heat to the coolant system)
Cheers and keep us posted will you?
--------------------------------------
ATS - Patrick Bureau - Canuck in Texas
ATS A1 Parts on ebay - http://tinyurl.com/22e5b
-----Original Message-----
From: scirocco-l-bounces@scirocco.org
[mailto:scirocco-l-bounces@scirocco.org] On Behalf Of calimus
Sent: Sunday, June 20, 2004 11:37 AM
To: Scirocco-l; ats@longcoeur.com
Subject: Re: Coolent system upgrade questions
Ok, I wasn't able to get back to my pc last night so now that I've caught up
on everything here we go.
Patrick, what you've said is very accurate. The T-stat that "was" in the
car was about 2 maybe 3 years old, I can't remember exactly when I replaced
it last. The one in it now is a 160f t-stat. The water pump was replace
last July 4th. And the radiator was replaced about 6 weeks ago. As of
yesterday, Here is what I did.
Drained the system and shoved a water hose in the expansion tanke and let it
run water through the system with the radiator hoses discconected and the
heater valve open. After about 15min of that, I started the car and let it
run for about 3min just to help pull some water through a bit and make sure
the pump was well washed out. I then proceeded to hose out the radiator.
After all that, I put in about 3/4 of a container of the "pink" stuff.
Thought it was orange, turned out it's pink. After that, I used water to
top off the rest of the system. I ran the car for a quick spurt and let it
cool off. Got a nice burp and then refilled with a mix of 90% water 10%
pink stuff. Took the car for another run and while temps were down, they
were still a bit higher then usual. I'm guessing I still have more air in
the system. The trick is, the water temp guage is reading up to the 3/4
line while my oil temp only gets as high as 110c. This all started a year
ago and I've been chasing the problem every since. Before then, the water
temp would only reach about a hair passed half way when I was doing triple
digits for more then a mile in the middle of summer. Heat currently from
the vents stays constant.
I'm starting to suspect something in the wiring now as I've also replace the
water temp sender. I don't have any oil in the water, or water in the oil.
I don't loose any water after weeks of driving. I haven't ruled out a
blockage in the head somewhere though, but it will have to wait a while
before I pull that and replace the head. I'm going to make a few more short
drives with it today and see if maybe I can burp it some more, but I think
the rocco is about to get downgraded from DD to tinker toy.
Thanks to all that have replied, sorry so long.
William
----- Original Message -----
From: "ATS - Patrick Bureau" <ats@longcoeur.com>
To: "'calimus'" <calimus@techography.net>; "'Scirocco-l'"
<scirocco-l@scirocco.org>
Sent: Sunday, June 20, 2004 9:04 AM
Subject: RE: Coolent system upgrade questions
> Well you can flush the system with water then run the "orange" stuff, but
I
> don't see why you will get better temperature from a system designed for
the
> green stuff, that worked for years, and now overheats.
>
> Your question is, "Why is my system overheating".
> The type of "coolant" you are using is irrelevant to the issue at hand.
>
> I have read all the replies to the original message, and I think Allyn has
> good points, check the Thermostat (you know, boil some water in a dish on
> the stove and dip on a string the thermostat to see if it opens/closes),
> Flush radiator (though I recall you mentioning it is new), Flush the
engine
> is another good one.
>
> I would do a trial run after replacing your thermostat, by simply using
> straight water with water wetter or 20% mix and see if the car overheats
> again:
>
> If it does not, you now know you solved your problem (water is cheap, that
> orange stuff is not especially for a test!)
>
> If it does, then you know it is something else than your thermostat;
>
> 1. Could be corroded passages that are partially blocked in the
engine/head
> preventing proper flow, (I have experienced this on the metallic return
> tube, corrosion settles nicely in it because of the low speed flow and
> diameter of the tube (it's the one running from the water bottle to the
> water pump!)
>
> 2. Could also be a tired water pump that is just not out-putting the
proper
> amount of pressure and the system is flowing too slowly
>
> 3. Also test this with the interior Heat on (additional circulation) if
the
> temperature drops once you open the heat to on, then you have a
circulation
> issue.(head by-passes through the interior heater to the return line),
which
> could point to a clogged flange or oil-cooler exchanger issue.
>
> Cheers, and keeping an open mind in troubleshooting is as much important
as
> understanding how the "circuit" of the system you are troubleshooting .
>
> --------------------------------------
> ATS - Patrick Bureau - Canuck in Texas
> ATS A1 Parts on ebay - http://tinyurl.com/22e5b
>
>
> -----Original Message-----
> From: scirocco-l-bounces@scirocco.org
> [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of calimus
> Sent: Saturday, June 19, 2004 1:47 PM
> To: Scirocco-l
> Subject: Coolent system upgrade questions
>
> Ok, so temps in the rocco still arn't what they used to be so it's time ot
> take things a step further.
>
> What I picked up
> 160F t-stat
> 2gal of VW "Orange" coolent (dats some exspensive shit)
> 16v passat dual radiator fan + new belt
>
> SO I'm sure you see where this is going. Things I'm unsure of: How the
hell
> to mount the dual fan system to a scirocco 16v w/AC radiator. It
certainly
> doesn't line up with anything and I knew it wouldn't. But al also know
that
> some of you folks run this system and have solutions. Now I'd like to
have
> a good solution, I already tossed out the zip tie idea as I'm shooting for
a
> much cleaner look. So anything not involving zip ties is more then
welcome.
>
> Now, I'd also like some validation for why I bought the orange coolent.
> I've had a few different folks tell me it's what I should use, though non
> were technical enough to give me good reasons other then "it's whats in my
> jetta/passat/golf". So is there anything different between the orange
stuff
> and your average everyday prestone coolent?
>
> Ok, while I await all the answers, I'm gonna go drain my damn coolent
system
> for the 3rd time this year in hopes of cooling this thing off since I'm
> pretty sure it's the t-stat now. But I'm always looking for ways to make
> her run cooler.
>
> William Snyder
>
> 88' Scirocco 16v
> 89' Cabriolet 8v
> 71' Karmann Ghia
>
>
>
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> Scirocco-l@scirocco.org
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>
>
>
>
>
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