BlueDevil Products 00209 Pour-N-Go Head Gasket Sealer - 16 Ounce

Blue devil gets it right. For the price and leak protection that comes with it you almost can't beat it. The engineered properly without particulates the clog systems especially sensitive ones like land rover. The speed in which it works is phenomenal! It has good durability and fashion that it lasts quite a while. Warning! add into your system slowly. Personally recommend a quarter bottle run it add another quarter run it to fully dissolved add another quarter and so forth. Warning! Add directly to the radiator. Add directly to the radiator again add directly to the radiator. Don't want to lose your product to the ground. It is truly value for the money for what this product does. Put it in the vehicle got it straight vehicle passed emissions and is now in use.

Works on some but be careful using this in newer vehicles.

The media could not be loaded. 2005 Honda Element LX AutomaticUPDATE: Prestone flush chemical did NOT react to Blue Devil crystals. It must've been bubbling from the heat gasket leak. I had to remove the radiator and flush it thoroughly to remove even more large crystal chunks. I hate that I used this product and hope that it doesn't end up clogging up my system in the future. In total, I did 1 garden hose flush of the entire system, 3 prestone flushes, a radiator garden hose flush (radiator out), and 4 distilled water flushes. AVOID THIS PRODUCT!Deceptively labeled as a "pour and go" product. If your cooling system has gotten any combustion gases in it or is "dirty" you will need to flush it, otherwise you'll just get a clogged system. I contacted Blue Devil support, where they were less than helpful. They merely put the blame on me, saying they had no idea why it would crystallize like that, or it might've already been like that. Yeah... I don't think so. I followed the instructions very carefully and poured even slower than instructed.I drained some of the existing coolant, enough to make room for the Blue Devil contents, then started the cold engine and poured a very small stream until the bottle was empty. I then let it idle for 50 minutes. 40 minutes into the idling, the air coming out of the heater vents began to get colder and the coolant gauge showed the engine temperature climbing. It appears this is when the clogging began to occur.I had to take all the hoses off and flush very well with a garden hose through everything I could. Still plenty in the system, so I did 2 Prestone chemical flushes of the system. At least the Prestone chemical flush seems to react with those Blue Devil crystal chunks and break them down. I left the flush (with distilled water) in the system for several days, driving it daily (just make sure temps aren't going to go below freezing). I'll flush 3 more times with distilled water to get all the Blue Devil glass powder out of the system, then fill with antifreeze and try K-Seal next, since it doesn't use liquid glass to seal.

2005 toyota 4runner. First it was the water pump leaking so much . I had to put water in it everytime I used it. Changed that. But still losing water just not as bad. Steam coming out of exhaust. Not water in the oil. Bought blue devil. Followed instructions.Haven't put water in it and that's been over a month. So I'm a believer and keeping my fingers crossed 🤞.

2008 Toyota Tundra SR5 Double Cab 4.0l with 1GR-FE V6These engines (Tacoma 4Runner tundra) Commonly develop a slight leak from coolant to cylinder 6 (sometimes 4) that is smaller than a leak down test can detect, official diagnosis involves seeing the coolant pooled in cylinder after it’s sat over night or holding napkin over hole while jumping engine to see stain of coolant fouling the plug.My Symptoms were an almost unnoticed coolant leak over time (never overheated) and then the first rough start, 30s of rough idle and code for misfire on cyl 6 along with flashing vsc, traction and CEL light. It would clear up quickly and clearing code and have normal operation. 2nd time was months later, then once a week, then daily, then anytime the engine was off more than 10 minutes, but it would still run great after the cylinder unfouled. Replaced the plugs and coils as a first step no improvement, but didn’t expect it to be fixed since it had classic symptoms of head gasket.I went with the BD because this was a minor leak, it wasn’t blowing white smoke yet, and it only involved coolant/cyl/exhaust and not oil and was told it wouldn’t hurt anything else. Followed directions to a T, but I quickly noticed the drivers side of the dual climate quit blowing hot (passenger unaffected) while sitting inside. Apparently It plugged the head gasket leak though so I call it a win, you don’t understand how much a pain it is to sit there for 5 minutes idling rough and clearing codes when you got somewhere to go. maybe ill replace the heater core one day when it gets cold so minus 1 star. Not sure if there was anything else to be done to fix an old truck with a $4k estimate to fix and a $5k value.

Purchased on 3-4-25, today 4-30-25 & still working!Worked as advertise!I let it set overnight to harden.