Question about 2003 Chevrolet Suburban 1500

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My 99 suburban with 178,000 mile ran hot. I poured water in the radiator before it cooled and when I cranked it steam blew out of the tailpipe. It ran long enough to pull it into a parking space. The next morning I was able to crank it and drive it onto the rollback. No smoke from the tailpipe and the oil did not look milky. The mechanic told me that the head gasket and head were cracked. He said he replaced the intake gasket and did a pressure test on the #3 & #6 spark plugs caused air bubbles in the radiator. Said we could rebuild and maybe be ok or replace the motor which he recommends. The car has run fine up until this incident. What would you recommend? What is your opinion on the gasket sealers they are advertising.

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You are in a tough situation for sure. For a rebuild of the top end to be successful the engine should be "decked" or measured to be sure that the top is perfectly flat for the new heads to go on. The engine has to come out to do this properly. Used heads that have been rebuilt would be safe to put on if you choose to rebuild.
If you rebuild you know what you have engine wise. A used motor from a scrapyard is an unknown but a reputable yard should be willing to give you a warranty, usually 30 days and only replacement, no labor. In all seriousness 30 days would be enough for any glaring problems to show up,especially if your mechanic checked it over good.
As far as sealers go, you are asking a chemical compound to seal an expanding and contracting hole while enduring compression and decompression several times a second. I don't think they would hold up any great length of time under those conditions.
Hope this helps.

Posted on Sep 06, 2009

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I have repaired head gaskets with this product. It is the only one I would use.You must follow the instructions to the letter.It is only available on line.I do not trust the stuff off the store shelves.Here 's the link watch the video.If your head gasket is fixable this is the stuff.When you get it to run I also recomend the new super cool additives they ( strauss,autobarn) sell they can reduce engine temperature by 10 degrees. Good Luck.
http://steelseal.com/

Posted on Sep 06, 2009

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No matter what, you need to find the source of the leak. A flashlight will be useful.

When the engine is cool, pour water in the radiator. You shouldn't need to run the engine.

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