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

[Bing]

I did in fact open the bleeders at the firewall  and purge air out of
system, the t-stat is installed with spring facing inward towards engine(as
per bentley) and did hold revs at 2k rpm while bleeding  and having heater
on....seams to be running fine now but  still think there is some air in
there still ...thanks to all responses ..


On 4/12/07, David Kase <davekase at pdqlocks.com> wrote:
>
>  Plus new ones can fail...
>
> DK
>
> Ryan Hoitink wrote:
>
> 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> <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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-- 
Bing
'01 A4 2.8QM 30v
'98 A8 4.2Q
'93 ur//S4
82 valves :-)