Antifreeze gelled up

JENNYJOLY

MEMBER
1999 PONTIAC GRAND PRIX
165,000 MILES

Old antifreeze was with the dexcool. Car started running sluggish, stalling, no power. Then the low coolant light came on, and I thought that was odd. I opened up the radiator, there wasn't any antifreeze to be seen, but a brown, red gel like substance was there. I am assuming the two mixed created this. I plan to flush it with a kit and garden hose.

can anyone give me advice?

3 Replies

HMAC300

MECHANIC
48,601 POSTS

If the dexcool has gelled in the engine it is very hard to remove. It gets like hard and almost swelsds to the cylinderwalls and will plug all the coolant passages up. If you get anything to try to clean it out get the prestone super rad flush/cleaner. Not the ordinary flushes. And if it works pull the lower rad hose off to get all theat crap out of there. You'll find out assoon as it starts whether it will work ornot. Remember get teh better cleaner not teh flush as it won't help at all.

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Thursday, December 15th, 2011 AT 8:13 PM

JENNYJOLY

MEMBER
4 POSTS

Thank you for responding. Can I flush the engine from the radiator, or do I need to attach kit to rad hose? Do you recommend a reverse flush?

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Thursday, December 15th, 2011 AT 8:26 PM

HMAC300

MECHANIC
48,601 POSTS

Actually the stuff that I reccomended is to empty the sytem as much as you can and then ad water an ddrive ofr about 100 miles or os then drain an drinse once more with water. The instructions areon the bottle. It is radiator cleaner not flush. And yse do this from the rad.

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Thursday, December 15th, 2011 AT 9:29 PM