Question about 2000 Chevrolet Astro

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Radiator Sealant will it cause problems down the road

I just bought a 2000 Chevy Astro Van. I noticed as I looked into the radiator . The fluid was black and gunked up pretty badly. I took it and got a professional radiator flush and fill at a local repair shop. I pulled off the cap again and noticed that the fluid was still black . The shop and I have come to believe that the previous owner must have added a radiator sealant to the coolant. Will this cause damage to my water pump and other parts ?It isn't leaking right now and the temperature is where it needs to be.

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  • Chevrolet Master
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It probably won't get any worse than it is now. Sealer is supposed to plug leaks when it comes in contact with air. Otherwise it stays suspended in the coolant.
You may want to do another flush in 6 months and then just keep an eye on it. Make sure the radiator and overflow tank are both full of liquid coolant.

Posted on Apr 23, 2013

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Posted on Jan 02, 2017

  • 625 Answers

SOURCE: 98 chevy astro van

mmmmmmmm they are really hard to replace but most likelly is goin to be a intake gasket, i do recomend you to call arrown the auto repairs and ask for a pressure test to the cooling system
this test is not that expensive and will tell you exactly where is the leak coming from, but on this type of vehicles i badly see a freeze plug leaking.

Posted on Aug 21, 2008

  • 6982 Answers

SOURCE: 1991 camaro overheating

There are two freeze out plugs at the rear of the block (V8) and many v6 engines. If coolant is coming from where you say, likely they have failed. Unfortunately, the only way to reach them is to remove engine or transmission, It's rare that they fail because they are "protected " by the bellhousing, but can still rot from the inside out. There is no sealer known to man that will fix this. It's a shame that you need to do all that work for a pair of $2.00 plugs, but that's what needs to happen.

Posted on May 23, 2009

  • 1 Answer

SOURCE: 1994 Chevy Silverado temperature guage shows hot

Flushing the radiator, replacing the radiator cap, adding new coolant, replacing the sensors and a new thermostat solved the problem. Probably didn't need to do all of these things - but since we just purchased the truck, and given the fact that is probably hadn't been done in a while, we chose to do all of these things (which really didn't cost a whole lot), it's running like a charm now.

Posted on Jun 03, 2009

seanpwright
  • 2030 Answers

SOURCE: 2000 Chevy Malibu- check engine light

Have the DIS module checked and the coil pack for cyl 3. If either/both of those need replaced, have it done and have the codes cleared. Then see if it clears the others.

You may need a TPS (throttle position sensor) as well.

Posted on Sep 11, 2009

agent91
  • 2100 Answers

SOURCE: leaks coolant were could it come from

If you don't know where it is coming from, you have to find that out. Check the location of the spot on the floor, if you don't have a floor, put down a piece of cardboard, locate the drip, then look under the hood for what it is that is leaking. It could be the overflow on the expansion tank, could be your AC condensate line dripping, could be one of those tiny coolant lines that return to the back of the engine, could be the water pump, could be a hole in a hose. I don't know why the pressure check didn't show anything, might be something else. Check it out.

Posted on Mar 05, 2010

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