Quote:
Originally Posted by Tom Mazz/CT
Has anyone used a NAPA combustion gas detector to check for leaking head gasket? Do I plug the overflow tube??
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I've used the Napa Block Test Kit. Easy to use, Just follow the supplied instructions. Fill the syringe with the supplied liquid to a fill line on the syringe. Place the syringe over the radiator fill opening , and use the supplied rubber bulb on top of the syringe to draw air (not coolant) from the radiator through the syringe liquid. If it turns color it has detected exhaust gasses in the radiator.. Casts about $50 for the kit, and there is enough test liquid to do a lot of tests/radiators.
No you do not plug the overflow hose.