A8 coolant circulation issues @#$%^&* !!

[Ryan Hoitink]

Is it possible that you've installed the thermostat backwards, and pressure
is keeping it from opening?  If the housing is hot, but the lower rad hose
is cold, the problem almost certainly has to do with the thermostat, or a
clogged radiator.  Nothing got into the rad hose when you had the engine
apart, right?

\Ryan

On 4/10/07, Bing <bing30v.audi at gmail.com> wrote:
>
> I recently replaced the the timing belt,t-stat,water pump,rollers and what
> not on my 98' A8 4.2Q  and now running hot at stop lights...I have cracked
> the bleed valves at the heater core to release trapped air, but not much
> air
> purged..My t-stat housing is super hot to the touch but my lower radiator
> hose is ice cold from rad bottom to t-stat housing while upper hoses are
> hot..T-stat is operational,it opened in pan of boiling water.....What
> Gives???
>
> --
> Bing
> '01 A4 2.8QM 30v
> '98 A8 4.2Q
> '93 ur//S4
> 82 valves :-)
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