Blue Devil, the verdict is in
Pro Wrench
Joined: Oct 2011
Posts: 1,709
Likes: 137
From: NE PA
Glad I'd rather do things the right way. I've seen you many clogged radiators, heater cores and worn out water pumps to even try something as obviously stupid as this.
The head gasket breaks at the rear of the head due to the placement of the head bolts.
Anyone still using dexcool is asking for trouble.
The head gasket breaks at the rear of the head due to the placement of the head bolts.
Anyone still using dexcool is asking for trouble.
TReK
Joined: May 2011
Posts: 2,768
Likes: 396
From: kitchener, canada
I use green coolant and 180 Tstat
what I find amazing is Atlantic British and dealers all recommend dexcool and never replace the oem Tstat to a 180 my 03 was dealer serviced up until last year and still all oem parts
when I got it it was running 215-225
what I find amazing is Atlantic British and dealers all recommend dexcool and never replace the oem Tstat to a 180 my 03 was dealer serviced up until last year and still all oem parts
when I got it it was running 215-225
Pro Wrench
Joined: Oct 2011
Posts: 1,709
Likes: 137
From: NE PA
My saab runs to 240 up hills. Been that way as long as I can remember.
Three Wheeling
Joined: May 2017
Posts: 65
Likes: 2
Dear sir,Sounds like it went down
Now that I'm holding the Blue Devil Head Gasket Sealer (with yellow label), it clearly says to flush all coolant and to use with pure water. Maybe the can didn't always say this, but it does now.
But it also says the engine must be cold. That made me wonder...
If I pour it into the overflow tank, by the time it mixes with the engine coolant it will be piping hot. So I looked on the Blue Devil website and found this :BlueDevil Pro says:
May 12, 2014 at 3:51 pmIf your vehicle has a reservoir/overflow rather than a radiator cap, instead of pouring it through the reservoir/overflow, with the car off and engine cold, you may add the product through the top radiator hose. Once it has been added reconnect the hose and start the idle from that point.
So that is my plan. I'll post back.
But it also says the engine must be cold. That made me wonder...
If I pour it into the overflow tank, by the time it mixes with the engine coolant it will be piping hot. So I looked on the Blue Devil website and found this :BlueDevil Pro says:
May 12, 2014 at 3:51 pmIf your vehicle has a reservoir/overflow rather than a radiator cap, instead of pouring it through the reservoir/overflow, with the car off and engine cold, you may add the product through the top radiator hose. Once it has been added reconnect the hose and start the idle from that point.
So that is my plan. I'll post back.
2nd Gear
Joined: Jan 2024
Posts: 2
Likes: 0
Blue Devil is the go!
By way of background, I bought a 2000 Discovery a couple of weeks ago. The PO told me that he had it diagnosed with a bad head gasket and likely in need of a new engine. He had parked it last year and it had been sitting his garage since. I bought it sight unseen and had it towed to San Diego from LA. I was ready to put in a new motor. I charged the battery and it started right up. It seemed to run great, other than a squeeky belt pulley.
I did notice at least three distinct head gasket leaks, one from each side at the back of the engine and one on the front corner of the driver's side. The leaks were such that a drip would develop every 3 or 4 seconds and run down the block and drip onto the ground while idling. There did not appear to be any combustions gases leaking into the cooling system, it looked like it was all external. I also check all of the spark plugs and they all looked good.
I have used White Shepherd by Universal Products on the transfer cases on a couple of my Discoverys with good results (I have no affiliation with Universal Products). Universal Products also makes a head gasket fix called BLUE DEVIL. They have two formulas, one Mechanic Style and one Pour-N-Go. The Mechanic formula requires a free-flowing system, ie removal of the thermostat. I couldn't figure out how to disembowel the thermostat so I decided to use the Pour-N-Go formula. Both formulas require an engine that will idle for 50 minutes without overheating. (I did a test idle on my engine and the temp held steady without significant coolant loss for more than an hour).
I ordered the BLUE DEVIL Pour-N-Go from Advance Auto, they sell a 32 oz. bottle for about $60 (the website shows the Mechanic Formula but they actually sell the Pour-N-Go). I could only find the Mechanic formula locally.
I put it in last night and after the required 50 minute idle, let it sit until this morning (with no radiator cap on the DII, I removed the top hose drained enough coolant and poured the BLUE DEVIL into the radiator through the top hose). I have driven it around all day, up to an hour at a time and so far, knock on wood, there isn't a drip present anywhere! Dry as a bone. The temperature gauge reads just below mid-line and the truck runs great. It is still early and I will give it more of a test this weekend, but for now it looks like it took care of the head gasket leak and may have saved me $$$. This will likely not work for all head gasket leaks, but for smaller, external leaks, it might be the answer.
Phil
1999 DI
2000 DII BLUE DEVIL Guinea Pig
2001 DII
I did notice at least three distinct head gasket leaks, one from each side at the back of the engine and one on the front corner of the driver's side. The leaks were such that a drip would develop every 3 or 4 seconds and run down the block and drip onto the ground while idling. There did not appear to be any combustions gases leaking into the cooling system, it looked like it was all external. I also check all of the spark plugs and they all looked good.
I have used White Shepherd by Universal Products on the transfer cases on a couple of my Discoverys with good results (I have no affiliation with Universal Products). Universal Products also makes a head gasket fix called BLUE DEVIL. They have two formulas, one Mechanic Style and one Pour-N-Go. The Mechanic formula requires a free-flowing system, ie removal of the thermostat. I couldn't figure out how to disembowel the thermostat so I decided to use the Pour-N-Go formula. Both formulas require an engine that will idle for 50 minutes without overheating. (I did a test idle on my engine and the temp held steady without significant coolant loss for more than an hour).
I ordered the BLUE DEVIL Pour-N-Go from Advance Auto, they sell a 32 oz. bottle for about $60 (the website shows the Mechanic Formula but they actually sell the Pour-N-Go). I could only find the Mechanic formula locally.
I put it in last night and after the required 50 minute idle, let it sit until this morning (with no radiator cap on the DII, I removed the top hose drained enough coolant and poured the BLUE DEVIL into the radiator through the top hose). I have driven it around all day, up to an hour at a time and so far, knock on wood, there isn't a drip present anywhere! Dry as a bone. The temperature gauge reads just below mid-line and the truck runs great. It is still early and I will give it more of a test this weekend, but for now it looks like it took care of the head gasket leak and may have saved me $$$. This will likely not work for all head gasket leaks, but for smaller, external leaks, it might be the answer.
Phil
1999 DI
2000 DII BLUE DEVIL Guinea Pig
2001 DII
2nd Gear
Joined: Jan 2024
Posts: 2
Likes: 0
Renault and Hyandai are next!
I am about to put Rear Main Sealer into the Renault and Hyandai. Bad leaks coming from both. Blue Devil is guaranteed to be a permanent fix. Pretty amazing stuff, in my experience using it.
Winching
Joined: Feb 2014
Posts: 679
Likes: 21
From: South Florida
Please keep us posted, thinking about pouring a bottle to try and fix a rear main seal on my 2002 Discovery S2 SE.
2nd Gear
Joined: Jan 2024
Posts: 2
Likes: 0
BlueDevil
I just had this done on my 2012 HSE. It was either this or another motor.
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