Has anybody used this product (Block Chek)? I've got 100K on my 2003 6.0L and am working through any remaining latent issues so it will last me a long time. I am wondering about the health of my head gaskets. I have been running a tow tune from Innovative for about 70K miles now. The only possible symptom of a head gasket problem is a very slight amount of coolant residue around the cap when I run the truck on a 95 degree day. I don't lose coolant or blow white smoke, and my EGR cooler is new. The coolant cap is new as well, and I installed the Bulletproof oil cooler earlier this year.


So I ran the Block Chek today, which consists of idling the engine hot with a baster-like device breathing in fumes from the coolant reservoir. The baster device is filled with a blue fluid which reacts with exhaust gases and turns yellow if they are present. I do see a color change; the fluid turns from a sapphire blue to an emerald green.


I would be interested to hear your opinions on this color change...they say to expect a yellow-green if there are exhaust gases in the coolant. I don't see yellow-green, and I wonder if it is normal to see some color change for a diesel.


Thanks.


Doug

 

I have read a few articles that say that test is not 100% accurate. The articles said that you could get a false positive like a pregnancy test.

If you are worried about head gaskets, the right way to check would be to build or buy a cooling system pressure testing kit.

Here is a video on it...

 

Yep,


I have the parts and am planning to run this test as well. Thanks!