Short back story, I the phh on a road trip a few weeks back, caught it early and managed to limp it home. A week ago climbing the pass I noticed the reservoir was filling, followed by air bubbles, dumped it back into the radiator and didn't have any more problems the rest of the trip. This week it started to do the same thing so I decided to try out the auto zone block test.
One thing I noticed is everyone seems to do it right off the radiator, but the people demonstrating the tool on YouTube seem to always use the overflow tank. Is there a difference?
I tried both ways, off the overflow (connected a small tube that fits in the vent and the tester) and off the radiator. I sucked down the coolant to just above the fins, but if I pump too hard it shows color change, but I also noticed coolant pooling in the radiator cap spot which makes me think false positive.
If I pull directly off the overflow bottle, I get zero color change. Even while the dip tube is bubbling.
As far as headgasket symptoms, it shows no others out side of the bubbling, and maybe a little coolant loss.
Any one have an idea how to interpret the different outcomes?
One thing I noticed is everyone seems to do it right off the radiator, but the people demonstrating the tool on YouTube seem to always use the overflow tank. Is there a difference?
I tried both ways, off the overflow (connected a small tube that fits in the vent and the tester) and off the radiator. I sucked down the coolant to just above the fins, but if I pump too hard it shows color change, but I also noticed coolant pooling in the radiator cap spot which makes me think false positive.
If I pull directly off the overflow bottle, I get zero color change. Even while the dip tube is bubbling.
As far as headgasket symptoms, it shows no others out side of the bubbling, and maybe a little coolant loss.
Any one have an idea how to interpret the different outcomes?