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My 97 Astro van is overheating after flushing radiator and changing thermostat. What can it Be?

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Did you burp all the air out of the system.

With the engine cold remove the radiator cap. Top off with coolant. Start the engine and let idle topping off coolant as necessary. When the engine is fully warmed up and you feel heat coming from the radiator fan replace the radiator cap.

Posted on Feb 14, 2012


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Posted on Jan 02, 2017

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SOURCE: Need to change thermostat in 01' Chevy Astro Van

It is located where the big hose comming out of your radiator connects to top of engine. Remove hose from engine your thermostat is undernieth

Posted on Nov 17, 2008

  • 34 Answers

SOURCE: overheating and no heat inside vehicle

Is there fluid still in it? if so i would say there must be a plug in the system. or the radiator may be going

Posted on Mar 14, 2009

  • 298 Answers

SOURCE: Overheating fiat seicento

I hope you have managed to solve the radiator problem by now. Seicento seem to suffer from water flow blockage in the heater blower area. I recommend you check the piper behind the carburator and make sure water is flowing. Normally when these pipes are blocked, water will flow back to the expansion tank and start leaking through its cap. You can also open the small screw on the small pipe coming out from the back panel behind the carburator and see whetehr water flows. Also, if the water is heard grumbling when engine is switched off, it is highly likely that the water is not flowing through the heater unit. Hope this helps.


Posted on Mar 29, 2009

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SOURCE: 1993 chevy camero- thick, rusty colored residue in radiator

The rust is probably in the engine. There are many little pockets, water ways, water jackets (around the cylinders), etc, so getting all the rust out without dunking the block and heads in a cleaning tank is about imposible. I would recommend giving it really good flush every 4 to 6 months. I would try flushing the radiator before replacing it because it is probably not rusted, even though it is full of gunk.

Posted on May 18, 2009

  • 11 Answers

SOURCE: overheating change thermostat water pump

If the head and gasket are good, and hoses not blocked, and the coolant pump is good and the rad is not blocked, all sensors and thermostats good, then it could be the heater core.

If you can bypass this during summer, it may help. The heater core is like a very small radiator, and often they get blocked up. This can restrict the collant getting around the engine properly, and cause overheating. If you leave this bypassed, you won't get hot air blowing into your cab during winter with the heater on --------- hey, who cares right now when it's summer!

Posted on May 31, 2009

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How to flush the cooling system on a 2002 Chevrolet astro van

  • Open pet cock drain valve at bottom of radiator

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