Need Help?

1995 Chevrolet C K 1500 Base Reg Cab 117.5 WB (CA)

1995 Chevrolet C K 1500
Do you own this car?
Estimated Mileage
Enter current mileage for most
accurate info about this vehicle

Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.

back to question list

Ask the Community

Ask Our Auto Mechanics

January 4, 2013, 10:35 am

Rob B

Question: air filling cooling system causing overheating

Hi, I'm stumped. Air is getting into my cooling system and it causes my car to overheat. I can't figure out the issue.
I've changed the thermostat, radiator cap, and pressure tested.pressure test seemed to come out good.I can hear bubbles swishing through the heater core when I accelerate. I don't smell coolant in the exhaust nor do I see signs of it in the oil. The truck runs fine after I purge it but after driving it and then letting it cool down it starts to overheat again so I have to purge it again. there is a slight, minute leak in the intake. I doubt it would be enough to suck this much air in but idk. All replies are appreciated. Thanks Rob.

Engine-95 chevy 5.7l TBI c1500

January 13, 2013, 3:41 pm

Elizabeth K

It sounds like a head gasket leak from the combustion chamber to the water jacket. Check for air bubbling up through the radiator overflow tank while running the engine up to 2500 rpm or so. Or you can do a compression leak-down test to see if there is air escaping to the radiator. If that ends up being the problem, you'll have to replace the cylinder head gasket.

0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to

My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…