Audi Original "S" Cars Discussion forum for the Audi Audi Ur S4, Ur S6, S2 & RS2

does it need to air bleeding in coolant system on UrS-car?

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Old 08-20-2007, 04:57 AM
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Default does it need to air bleeding in coolant system on UrS-car?

Since I removed the cyl head to check up for any crack or bent on the cyl head .Seem that the head is fine.the radiator is not clogged up.the brand new thermostat.but the coolant is still boil over after long period of idle or rev the engine till the temp was raising upto 130C. So I remembered that I've never done the air bleeding in the system.So how to do the air bleeding in the system?
Seem that I need to back to check the basically thing again.
Old 08-20-2007, 05:08 AM
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Default You do need to bleed it, Pop.

I do remember it being discussed here recently...
Old 08-20-2007, 07:32 AM
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Default When I put mine back together the only bleeding I did was letting the car run with the cap off...

On the first re-start I filled the reservoir and let it drain into the radiator. I let the car run while I re-filled the cooling system until it reached the proper level and it's been perfect since then.

I would try running it with the cap off until warm and you can see if the level changes or if any bubbles come out.
Old 08-20-2007, 08:35 AM
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Default

Exactly. That and the odd squeeze on the coolant hose to surge out some air.
Old 08-20-2007, 07:23 PM
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Default Thanks to Turbojew and Dave.

I 'll do the air bleeding again.
I'll keep an updated.
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