I used the bluedevil permanent stuff a couple months ago so far it's worked hasn't lost a drop of coolant, engine tick went away from the coolant getting in the motor, runs and sounds perfect again.
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Same here on my 4.8 in my work van. Hasn't lost a drop of coolant since.I used the bluedevil permanent stuff a couple months ago so far it's worked hasn't lost a drop of coolant, engine tick went away from the coolant getting in the motor, runs and sounds perfect again.
Which heads do you have?I am fixing to give Bars Stop Leak a try on a 4.8 liter 2001 tahoe with castech heads. We are having a leak of coolant but cant find where its at.. nothing on the ground.
will let you know.
I think the 862 heads are right up there with castech heads. 2 different vehicles with the 862's--exact same problem.I also have a 04 Tahoe. It has 862 heads but I started having loss of coolant. Couldn't find a leak. But I used the ac delco tablets the guy above me posted an havent had to add a drop since. I was adding coolant everyday