Blue Devil (00209-6PK) Pour-N-Go Head Gasket Sealer - 16 Ounce, (Pack of 6)

I have tried and reordered literally every similar product on the market and find pour and go to work the best, for the least amount of money and with by far the least hassle. Locke the bottle says ' pour n go' . It has worked on 90% of what I tried it in including a Cadillac north star engine. I order the 6 pack. I have noticed in tough applications that a 2'nd treatment may be needed.I urge you to remember that you must find the source of what caused your engines overheating issues and to fix that first if you expect tangible permanent results from any product. If you have a small leak, a bad radiator or your fans are not working for example, your problems with the head gasket were caused by these failures. Fix the source of the overheating then fis the head gasket. In GM 3.1 and 3.4L engines, you typically have leaky upper and or lower intake gaskets that you maya not readily identify, you must first tear down the intake and replace the damaged gaskets before the product will seal the HEAD gaskets. Failure to do so will not get your car fixed. The intake job is exponentially easier and cheaper than a full head tear down, and must be completed to get results.

My car had been losing coolant and overheating. I was going to purchase a much less expensive gasket sealer but an Auto Zone employee pointed out that although Blue Devil was much more expensive, it had a "Permanent Repair Guarantee". Blue Devil did stop the overheating and coolant leak for about 4 months before the symptoms started coming back. ( I only drive about 30 miles per week) A little while later I contacted Blue Devil and spoke with Zack Friedley who was very helpful and sent me a replacement bottle. He only required that I send a picture of the bottle I used in lieu of a receipt. This time it was harder to get the gasket to seal but eventually it did. This again lasted about 4 months before the symptoms started to came back. I sent Zack at Blue Devil an email informing him that the gasket did not hold again but this time he was not as helpful. Zack replied with a warranty form that required a receipt showing purchase within 60 days. So I guess the promise of "Permanent Repair Guaranteed" on the label is deceptive.I would recommend that someone purchase that less expensive product that you can buy several times before you reach break even with the cost of the Blue Devil. I don't know how long it would last if you drive more than 30 miles per week or any faster than 50 mph.

Resale

Even when used as per instruction this can cause clogging in your cooling system, particularly in the smaller aluminum block. My car started overheating after using this product and I had to replace the thermostat, water pump, radiator, and multiple hoses