Overheating and no heat

RIDDICKS

MEMBER
2005 CHEVROLET VENTURE
159,000 MILES

My car was giving out cold air and overheating. We fixed the thermostat thinking it was that and it is still over heating the reservoir is full of antifreeze. Please help this is getting ridiculous trying to figure out why it is still not giving out heat and overheating.

Sunday, March 4th, 2018 AT 7:42 PM

1 Reply

ASEMASTER6371

MECHANIC
52,796 POSTS

Good morning.

The fact that it has overheated many times tells me that there may be damage to the head gaskets. That is when compression leaks into the cooling system and injects air into the system. The heater core is at the top of the system and that is where the air will settle. A leak down test will verify if that is the issue. Very common issue for this engine.

You can try bleeding the system as well to see if you can get any heat. Remove the radiator cap and have someone inside the van and run the engineat 1200 rpm. Watch the coolant level and add as needed until you get heat inside the van. You can try this to see if you can get heat.

Does the temperature run normal now that you have changed the thermostat?

Roy

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Monday, March 5th, 2018 AT 4:50 AM