Audi A8 This full sized Audi A8 sedan offers interior luxury and spaciousness comparable to any car in the full sized luxury sedan class

Coolant depletion

  #1  
Old 06-10-2006, 12:27 PM
Thread Starter
Join Date: May 2006
Posts: 1
Default Coolant depletion

All,

Looking for help. Have a 1997 Audi A8, and my coolant reservior will lose about 1" of water in 2-3 hours or so of running. I cannot find any leaks under the car anywhere, believe I have looked. The oil is not milky so it is not going there. The exhaust seems normal and is not white. Anybody have a similiar experience? My fear is somehow I am burning it through a bad head gasket.

Thanks,

RJ
 
  #2  
Old 06-10-2006, 04:04 PM
2nd Gear
Join Date: Apr 2005
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Posts: 505
Default RE: Coolant depletion

That is a pretty old car, does your coolant reservoir hold pressure (pressure test it)? The coolant reservoir gets brittle and cracks and then if it is not holding pressure it will steam off your coolant. Try the res. cap too (pressure test). If you can't find/ don't have a pressure tester (it is like a bike pump with a radiator cap) drive around and get it warmed up then open the hood and check for steam coming off. If it is a cap though you probably won't notice it.

No oil in the coolant or coolant in the oil I would say you are leaking or steaming off.
 
  #3  
Old 06-11-2006, 01:31 PM
3rd Gear
Join Date: Oct 2005
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Posts: 2,646
Default RE: Coolant depletion

Dont forget about the heater core. That will produce a leak under the dash.
 
  #4  
Old 06-11-2006, 02:06 PM
Join Date: Nov 2005
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Posts: 12,826
Default RE: Coolant depletion

most common coolant leak on the V6 is below the plenum so out of sight and very hard to see, best to remove the plenum to investigate
 
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