Date: Wed, 16 Oct 2002 19:27:54 -0700
Reply-To: "Phil S." <napszeerf@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "Phil S." <napszeerf@YAHOO.COM>
Subject: Re: Overheating; I4 Jetta conv; water pump ( a bit long)
In-Reply-To: <430B80EDAA292242B986CCCC2E2084F60282ED@COBVS1.city.burnaby.bc.ca.proxy>
Content-Type: text/plain; charset=us-ascii
I have a Tiico I4 and i had a similar problem. my
problem ended up being an air bubble in one of the
coolant lines. The overheating happened after i
changed water pump and thermostat(which created a
bubble) I jacked the front of the van up 20" and bled
the radiator 6 different times(different days too)
untill i got the bubble out(dont forget to turn heater
all the way on) PRMs must be above 2000 to get the
bubble to burp out the bleeder screw in
radiator......its a major PITA . Also you might want
to tighten up on all your hose clamps, they could be
leaking in air with no coolant drip to show for it.
hope dis helps
Phil Stanhope 84 westy tiico
--- "MacLachlan, Bill"
<Bill.MacLachlan@CITY.BURNABY.BC.CA> wrote:
> I'm in the throes of sorting out the cooling system,
> and some other
> opinions would be welcome....
>
> A friend ( who knows the vehicle) drove it across
> town for ten minutes
> or so Saturday, and it started to overheat. She
> turned on the heater to
> get some more cooling going, and pulled over at the
> earliest chance,
> parked. Well done I say!
> But odd. The system was working fine the day before.
> In downtown traffic
> too.
>
> I took the van back home next day, found a warm hose
> to the rad, cold
> one to the water pump. Replaced the thermostat with
> one I tested. No
> change. Hear hiss of air when warm engine is turned
> off. Noticed water
> coming from the water pump housing when engine
> running ( remember this
> is an I4 1800 jetta motor, with an I4 jetta one hose
> expansion tank).
> Pulled the pump and housing apart. Housing has
> corroded/worn/disintegrated from the inside and
> there is a pin hole in
> the housing allowing water out & air in.
>
> Replaced entire waterpump & housing with new one.
> Top up with water as
> test. Still hot engine/cold rad. Took out thermostat
> and ran engine with
> no thermostat. Hot engine cold rad and cold heater.
> Pulled rad hoses
> with engine running.
>
> Got very wet. Ick. Ick Ick Turned engine off.
>
> So there is water going to rad! Pulled radiator.
> Took to shop. Flow test
> shows water runs through, but because of the
> "baffled design" of the rad
> ( shop guys words) it is difficult to tell how good
> the rad is. But the
> suspicion is that radiator is working well enough.
> Conclusion: one huge
> vapour lock in the system somewhere........that is
> completely stopping
> water from circulating through radiator.
>
> Now, I've replaced the fluid/bled the system in
> this van before, (
> pulled the radiator; changed the expansion bottle;
> changed the heater
> core; dealt with leaky expansion tanks) and done it
> with the non
> standard expansion tank I'm using, but I have never
> had a problem like
> this one....
>
> Oh great and widely experienced list, any
> suggestions?
>
> Bill M.
> '82 Jetta powered GL ( in several pieces at the
moment)
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