Today I ran the chemical test again. This time I did it right after a long drive, while the engine was still hot. I drained a good amount of coolant, probably 3/4 gallon. With the engine hot, the solution rapidly turned a yellow like urine and I didn't even have to rev it. I'm sure now, that this is either a blown gasket, or a crack in the block. What I can't understand is how it happened. The truck wasn't losing coolant at first and then it just started losing it, with no overheating from me. Maybe a crack opened somehow? Still, crystal clear coolant and oil, with no smoke or steam from tailpipe.

 

I hate any fixit in a can for any kind of a leak they usually have drawbacks and cause other problems.


But I say try it out may as well see if it can make your leak go away and go from their if it fails then its r/r the heads time.


I made the mistake of using a leak fix in my power steering system a year after the fix in a can it was leaking again so I had a shop fix it. Two years later I pulled the fluid tank and found the leak fix had coated the inside of the tank with a kind of rubber film so my guess the steering system has that crap coated with this stuff..... not good and a potential problem waiting to happen.


So I don't trust any leak fix in a can it took me many tries to flush that crap out of my steering tank and replaced both fluid lines. I lost the pump a few years later cant say what caused it to go bad but it could have been the leak fix.

 

Trust me, it pains me to have to use it. I have never ever used this type of stuff and really don't want to, but it's worth a try given the alternative. It might not even be just a head gasket, it could be a cracked block and I'd only know after pulling it all down.

I plan on disconnecting the heater core till I flush it all out. Wish I still had my old radiator, cause I'd swap it out temporarily too.

 

More pics of the oil and coolant. I also tried a sizzle test. I dripped the oil onto a hot skillet and there was zero sizzle, so there is no water in the oil. Coolant, you can see for yourself.





So the question is guys, how can there be combustion gases in the coolant, without any exchange of fluids, or overheating or any other symptoms except coolant loss?

 

if there are no visible leaks, the coolant is probably being burned in the combustion chamber. if you pulled the spark plug and video scope the combustion chamber, the leaking cylinder maybe be vey clean compared to the other non leaking cylinders.


other test options are to check to see if the cooling system is being pressurized by the pressure of combustion or do a compression check.

 

I am having the same problem with my 02 Dakota 4.7 4x4.
Did all the same test.

 

Your test results? Keep tabs on this thread. I'll update with results when I use the block sealer. Won't be soon though.

 

Going to try iron tight block seal. I found the
head gsk leaked on cylinder 4 then got it
to leak on 3,5,7. So I am going to give it a shot
with the sealer for now but I will rebuild it.

 

I'll be using this....

http://shop.advanceautoparts.com/p/c...232&showTitle=

 

I think will try that stuff too. ��