overheating

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Nov 7, 2008 | 10:15 PM

vtats

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overheating

i got an 04 tt 1.8t its overheating and when i turn on the heater it blows cold. i replaced the thermostat (fun fun) still got the same problem. im thinkin waterpump. this is my first audi , im kinda lost.

Nov 8, 2008 | 09:21 AM

einsgruber

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Could be water pump impeller broke... read somewhere on this forum about a similar problem a while

ago, and the plastic impeller on the pump had broken in half.

Go to the "Resources" menu up top on this forum and have a look around. There are alot of good step-by-steps that can help you.

Nov 8, 2008 | 09:28 AM

einsgruber

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Here's a link to that broken impeller post I mentioned- for a B6

<ul><li><a href="https://www.audiworld.com/tech/eng99.shtml">https://www.audiworld.com/tech/eng99.shtml</a</li></ul>

Nov 8, 2008 | 11:05 AM

ScratchRob13

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Could be a waterpump for sure, but more likely there is air in the system. Need to bleed first.

Probably air right by the pump.

Nov 8, 2008 | 11:28 AM

vtats

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Re: Could be water pump impeller broke... read somewhere on this forum about a similar problem a whi

thanks for the advice, the more i think about it it should be the water pump , but i hate to dig into that procedure and have the same problem when im done. i cant see having air in the system cause it just started overheating on my way home on tuesday

Nov 8, 2008 | 01:34 PM

vtats

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Re: thanks for the link, looks like great times will be had!

Nov 9, 2008 | 10:25 AM

Aarononymous

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when you had the t-stat out the impeller was right there to check :-(

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Nov 11, 2008 | 07:59 AM

Melinko bq

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My bet on impeller. BUT....

Don't forget to bleed after. If you are overheating and no heat - likely air in the system if the two are related in any way. Usually air in the system doesn't cause overheating, as it has a tendency to purge the air out itself below the coolant reservoir (all of the motor purges itself)... Heater core requires bleeding though, and that may be the cause of your no-heat, though likely because no water circulating...

If you are full on coolant, then take the WP out and plan to replace anyway with METAL IMPELLER. And hey - while you're there - might as well do TBelt & pulleys again too... =)

Search on here to find DIY on all of the above if you're unsure...
Let us know the updates!