head gasket issues and using sealers

[Skyedriver]

PositronicRay said:

I used K Seal. Oldish car ran it for another 3-4 yrs everything ok, heater fine then sold it. A year later I had an email from the purchaser, he'd just had a fresh MOT and wanted to let me know how pleased he'd been with it.

Got another 50k miles out of a Volvo 940 with serious H/G failure after treating it K Seal
Only problem I had related to the stuff was it gummed up the thermostar.

[EzyQ]

I have an update with this problem

Took it to a garage and got a sniff test done on the cooling system and no CO2 detected.

Mechanic has seen these motors develop water pump issues with the impeller not working correctly causing the water to boil in the block causing the back pressure

So now going to change the water pump this week.