12.7 s60 engine head gasket in Larado?

I skimmed over this. Take the CAC out and wash the rad, wash the CAC. They are known to collect junk in between them. Had 10 new in a fleet.

 

Go to your local home improvement store and Buy Coil cleaner. Used to clean the condenser coils on your home A/C spray it on after you get CAC off And A/c condenser. It will foam up and help emulsifying the crap out of the fins. I do it 2 times a year. really helps with the pressures in A/c system.

But sure you don’t have a bad sending unit? Or connection to sensor. What does a FLIR temp gun say?. If can get one compare the temps to what sensor shows. just maybe some ideas to ponder

 

OK is it oil or fuel in the surge tank? Looks like fuel to me. Oil usually turns the whole tank black. Fuel darkens the coolant appearance.

 

Did I miss something, he said coolant was clean on a white paper towel?

 

So what else make you think you have a head gasket problem? Just the temp fluctuations?

 

NO I missed that post. I'm out.