BlueDevil Products00209 Pour-N-Go Head Gasket Sealer - 16 Ounce

Okay, I want to be clear that I did not use the Pour-N-Go product, even though that is what I ordered on Amazon. After reviewing the instructions, I realized this was not the right thing for my car. I spent the last 4 years of my life restoring a 1965 Ford Galaxie XL convertible with 390 engine. This was a frame-off restoration that I did entirely myself, only farming out a few essentials like plating and machine work. I assembled the engine myself and triple checked my work. I wrongly assumed that the block and heads were decked sufficiently to use any head gaskets I wanted. I was wrong. After having the engine fully detailed and back in the car, my first test run was a bit of a disaster. Steam was coming out of the crankcase and I quickly realized I was getting coolant in my oil and vice-versa. No bueno. I pulled the engine and removed the heads. I swapped the thin steel-shim gaskets for thicker Fel-Pro versions that actually advertise their ability to seal imperfect surfaces. All seemed well after cleaning the water and oil passages and re-assembling. I finished the car and have put a few hundred test miles on it over the past few months. It runs great now and pulls well. Now that summer is fully on, I have been chasing some unexplained overheating issues that made me really study the cooling system and try to track down my issue. I've had a couple boil overs in this car that just didn't seem right, and strange bubbles in my coolant made me think to check with a combustion leak test kit. I saw the results I feared that I was getting compression/exhaust gases in my coolant and my cooling system was being over-pressurized and overheated by this issue. My heart sank at the thought of fully disassembling this engine....again. It would be a very involved process getting it back from the machine shop and compensating for the changed geometry that decking the block would create. I went to an online forum for the Ford FE engine series for advice and someone suggested trying Bars leak before resigning to a tear down. I figured I had nothing to lose, and I already had pretty big respect for Blue Devil products after using their Transmission Seal products with amazing results in the past. Reading reviews on Amazon further encouraged me, but I had little expectation of success. Firstly, I am rarely lucky, and secondly, It seems like products like this are meant more for keeping coolant out rather than compression. The pressures of a cooling system are nothing like what's inside the cylinder's combustion chambers.So, with this on order, I realized that what I actually needed for my engine was the larger quart bottle of head gasket sealer. I actually picked some up from a local Auto Zone even though it was more expensive. I wanted to get it sooner to take advantage of a day off work. I had already flushed my cooling system and used some Thermocure to descale and remove rust trying to remedy the overheating. This was before I discovered the real issue, but it made for a shortcut for being ready for the Blue Devil product. I used the radiator flush as described as well just to be by-the-book. I removed the thermostat and placed a new gasket on the water neck. I used the whole quart bottle on a cool, not cold, engine. I let it run for 50 min. as directed. I let it cool enough to handle things, replaced the thermostat and gasket then topped off the radiator with anti-freeze (the instructions pointed out that you don't need to do a flush after using the product, implying that the remainder being in there may continue to work to help seal things). After getting things back together, I used the block tester kit again and NO color change. I went and drove the car fairly hard to create some compression pressure, I came back and repeated the test--still passed. Really seems crazy and a little too good to be true, but definitely an impressive outcome. I really hope this is a permanent fix, but I will certainly be suspicious of a future failure. I'll plan to do some retesting periodically to make sure this isn't recurring.Anyway, definitely give these products a try. Completely worth a shot!

02 volvo 238k inline 6 cylinder non turbo. Owned vehicle for 10 plus years. Heater core started leaking, 500 bucks plus for new one so I continued to drive adding water when necessary. Gave up putting anti freeze in it as to expensive and only leaks out. It Got so bad interior was starting to flood, like a lot! It was actually sloshing around. Finally, I bypassed heater core and continued to drive. Then the head gasket blew! Hot Water/coolant was pushing backing up through clear plastic reservoir. Like real bad. It was steaming and boiling over like a volcano. Yep, I continued to drive adding water and using it for very short 3 block trips before it overheated. Went to get head gasket repaired. Got quotes 2500 to 3000! I thought the car was trashed. Wife said take to junk yard. Cut our losses. I saw an ad on amazon and laughingly bought 1 bottle of blur devil pour and go. I followed the directions. Remember I already bypassed the heater core so it wasn;t hooked up. I just ran the 2 hoses together to bypass it. I added it to the top radiator hose and put the hose back on. I ran the car as directed. White smoke pouring out of the tail pipe, puffing, chugging, running on only a few cylinders. I was Completely embarrassed as the neighbors looked on from down the street. It said to run 55 minutes at idle but after about 40 minutes I felt sorry and said this is enough I have to put the car out of its misery and shut it off. I slammed the hood and went inside. Next day about 20 hours later I start the car to move it in the drive. I watched the temp gauge, then I hear a thunk. I watch and it isn't over heating. So I take it for a spin around the block. Its Running good. WTH? Omg did that blue devil stuff work. Cmon no way. DId it really work? What the heck is going on-wht isn't the car overheating? Is the gauge stuck as I hit the dash to check. I am in complete shock! My Jaw is dropping I run into the house. I am speach-less! Honey, Honey, the volvo is back!! Yea right she says No I'm serious! Go for a ride with me-If we break down ill never speak to you again, she says. We went out cruising all over. Car ran perfect. No overheating. No smoke from tail pipe. No chugging, no fumes, etc. I am in STILL IN AWE OF THIS PRODUCT. My issue was very serious and 1 bottle and it worked. I am not getting paid for this and I do not lie. I have no reason to. And I do not wish to deceive my fellow man. All I know is THIS STUFF WORKED IN MY VOLVO, and trust me it was in sad shape. THANK YOU BLUE DEVIL AND TO THE GUY WHO INVENTED IT AND ALL YOUR EMPLOYEES AND AMAZON.