Question about 1997 Chevrolet Blazer

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I have antifreeze running down the drivers side of my transmission but cant find where its coming from

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Unfortunately, if you can't trace the flow of the fluid back to its source, you will need a specialty tool to do this yourself. I can tell you what a mechanic will do as part of an evaluation.

A mechanic will first use a kit similar to this Craftsman set:
http://www.sears.com/craftsman-cooling-system-pressure-tester/p-00946342000P

Essentially this works by attaching an air pump (like a bicycle tire inflator) to where the radiator cap fastens. By forcing pressure into the system, it will cause (hopefully) fluid to spurt out of small pinholes or around seals where it is leaking. After pressurizing, the mechanic will look with a flashlight.

The second part of the test is to dump a ultraviolet dye into the system and run the car to circulate it. After waiting for a bit of the dye-antifreeze to flow out wherever it is, the mechanic would then use a black light to trace the leak.

If you have access to a pressure testing kit or dye, you might be able to do this yourself, otherwise a leak test runs around $30 to $40 at a standard mechanic.

Posted on Oct 25, 2012

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