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Testing liquid for head gasket warping

(1990 Mercedes-Benz 300E)
in Palmdale, CA on September 29, 2010
is there a tubed blue chemical that can be placed in the coolant and then connected to a engine that will turn green or yellow if head gasket is warp/blown?
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on September 29, 2010
Napa has a kit http://partimages.genpt.com/largeimages/223665.jpg about $50 at your local Napa Auto Parts
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on September 29, 2010
Yep, it will change the color from blue to green if CO2 present in the coolant, however YOU DONT PUT NOTHING INTO THE COOLANT!!! You put a small amount of test fluid into the probe, crank the car, rev it up few times, remove the radiator cap and place the probe to the radiator neck or to the reservoir - MAKE SURE IT WON'T SUCK ANY COOLANT INTO THE PROBE- only air. Coolant will damage the test fluid and maybe the probe also. Read the user manual!
Don't remove the rad. cap when it's hot!

Zee
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