Head gasket coolant leak Chevy Blazer 01

[fcobob78]

Hello all,

I think I found the source of a coolant leak by doing a coolant pressure test as suggested by ETCG suggestion. I have included a video of what I found, however, please excuse my video shooting skills. It is short and kind of hard to see, so hope it helps.

I can hear coolant “bubbling” in some spots where the head gasket is. So, I’m thinking this is a pretty good result of my diagnose that tells me the leak is from the head gasket. Is there any other way to triple check this? I know this could be a tedious job, so I want to make sure this is it. Also, how hard of a job is it involved? I know is tedious for sure, but would love to take up on the challenge of doing it myself.

The first video shows the area beneath the accelerator cables, it seems like coolant seeps more in this area. The second (shorter video) shows coolant coming through the head gasket just above where the water pump is located ( note is not the connection of the water pump, just above it).

A brief history of the leak: Started long time ago when I was living in Canada (maybe 2 years+/-), I could smell coolant, but I couldn’t tell where the leak was and didn’t notice any significant coolant loss, no overheat maybe after several months had to top it off. Drove this car last year to AZ and now the leak it has gotten bad. Coolant loss is very noticeable and level goes down fast. Also, I should note the leak happens only when the engine is running and after is warm. Once other thing that happened at the beginning of the problem, I could hear coolant noise when accelerating down by the heater core. I tried to solve this by purging the air but no results. So, my guess now is that air was always in the system because of the leak?

You guys are awesome thanks for the help and for reading. SD
Francisco

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[fcobob78]

Thanks for the reply. One other question is regarding a fitting connection that I will need to replace. It is where the PCV connects into the upper intake. Fitting was brittle and when I yanked the hose the fitting broke. See pic below. What’s the name of this re

placement part and its function?

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• photo.JPG

[fcobob78]

Figured out is just the elbow fitting that broke. So, I just bought the replacement. It looks like the other fitting is just like a connector fitting to the upper manifold

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