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Re: '86 4000quattro overheats on the highway
> Steven Selick writes:
> > ... but at highway speeds > 70mph, the car completely overheats ie
> > goes almost to the top line, and the red tep light on the dash comes on.
> Is the car really running hot, or perhaps your gauges and lights are
> fooling you? Maybe the temperature sender is bad...
Or there could be a head gasket leak, does it loose any coolant?
Or there could be a restriction (scale) in the engine block.
Or the ignition is too(too too) far advanced, engine knocking.
Or thermostat does not open, very unlikely on a new one though.
On my Audi the temp drops at highway speeds.