S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

which radiator hose is the INLET into the radiator? the drivers side (top) or the pass side (bottom)

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Old 06-16-2007, 08:19 AM
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Default which radiator hose is the INLET into the radiator? the drivers side (top) or the pass side (bottom)

thanks!
Old 06-16-2007, 08:21 AM
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Pretty sure it's the passEnger (that's for you box-of-parts :-p) side bottom
Old 06-16-2007, 08:27 AM
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Default doesnt look like it to me...but im not positive.

im looking for the inlet to the radiator. it appears here that the pass side goes into the block (wouldnt that be the radiator outlet?).

(Thanks Mark P for the pic)
<img src="http://ctny.audiworld.com/mark/s4/maintenance/timingbelt/images/DSC02108.jpg">
Old 06-16-2007, 08:31 AM
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just found a diagram for the 2.7T. for the archives, RADIATOR INLET is driver's side upper.
Old 06-16-2007, 08:33 AM
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Default I thought the very top hose goes into expansion tank.

If you shine a light into your expansion tank you can see the fluid in that very small top hose going into the expansion tank. *shrug* maybe it was going out.
Old 06-16-2007, 08:36 AM
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Default yep, only makes sense..it would be awfully hard for the fluid to flow UP from the bottom hose.

pump + gravity at its advantage
Old 06-16-2007, 08:41 AM
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Default haha, yea I was thinking that. But I coulda sworn I saw fluid going into the overflow tank from that

top hose.
Old 06-16-2007, 01:21 PM
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Top is inlet....All radiators I've seen are this way.
Old 06-16-2007, 08:58 PM
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Default That doesn't go into the block, it's attached to the thermostat housing outlet.

Coolant flows out from the thermostat to the radiator, not the other way.

Except in the case of our cars and say, old MGFs..


<a href="http://www.mgfmavhh.ukf.net/">Page with a description of the problem of backwards systems like ours.</a>
Old 06-16-2007, 09:34 PM
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if it wasn't clear already Josh, the top drivers side is the inlet
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Quick Reply: which radiator hose is the INLET into the radiator? the drivers side (top) or the pass side (bottom)



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