1994 Chevy Silverado overheating in the cold weather

MIKEY9660

MEMBER
1994 CHEVROLET SILVERADO
V8
4WD
AUTOMATIC
157,000 MILES

Why is my engine over heating and not blowing heat I just got a new radiator and it has new coolent and all that what should I do?

Tuesday, December 8th, 2009 AT 1:03 AM

5 Replies

BUDDYCRAIGG

MECHANIC
2,262 POSTS

It's not blowing hot air because it's low on coolant or it's over heating.

It's over heating because there is still a problem with the coolant system or it's low on fluid.

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Tuesday, December 8th, 2009 AT 1:49 AM

MIKEY9660

MEMBER
2 POSTS

The coolant is full and could the thermostat be bad I was looking on some other sites and they said that your suspost to change it anytime you change your radiator

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Tuesday, December 8th, 2009 AT 1:55 AM

BUDDYCRAIGG

MECHANIC
2,262 POSTS

Yes the thermostat could be bad.

And there is no rule as to when you should change it.
They fail at random.

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Tuesday, December 8th, 2009 AT 2:02 AM

MIKEY9660

MEMBER
2 POSTS

Would that cause it to the engine to overheat and not blow heat?

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Tuesday, December 8th, 2009 AT 2:04 AM

BUDDYCRAIGG

MECHANIC
2,262 POSTS

Yes.

If the engine over heats and the coolant starts to boil.
The liquid coolant becomes steam.
Steam going into the heater core in the dash cannot transfer heat the way liquid can.

So you would not get any heat out of the vents.

BUT.

You would have the same problem with a coolant system that is low, or not filled correctly.