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Discussion Starter #1
I have an '03 DTS. Just today, my engine started to run hot (needle in the red), I'm smelling the coolant smell, but there are no leaks. Could it be that I just need coolant very badly, or is this an indication of either the water pump or the thermostat needs to be replaced?
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Open the hood and do some troubleshooting. Coolant leaks ? Low coolant level ? Water pump drive system intact and belt tight ? Thermostats in these cars are very reliable - for a long time.
 

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1991 Cadillac Sedan deVille
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Don't rule out a blown head gasket on that engine. I think those were still prone for that. Also as mentioned check coolant level, etc. Rule out simple things first.

Good luck!
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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If he's smelling coolant and the engine has no starting or rough idle problems it isn't the head gasket(s). Let's get the obvious stuff first.
 

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White Diamond '03 DHS (with DTS floor shift)
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86,794 Posts
Yeah, if you smell coolant, it's leaking externally. If it's not coming out of the overflow because of overheating, you have a leak somewhere.

If the WP ia spinning, it's good.
Thermostats rarely cause problems.
Sureg tanks and radiator side tanks are known to crack and seep coolant. Look for the chalky white telltale residue of dried Dex-Cool.
 
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