Question about 1993 Mercury Grand Marquis
Mech. at garage cannot find the leak (headgaskets known as a problem?) or other hiden hoses to heater?
I would take the car to another mechanic. With a few tools (pressure tester, mirror or scope, and a good light) that mechanic should be able to narrow the search down to the source. If the heads, intake, and hoses to the heater core are dry. Then it could be coming from a freeze plug behind the trani or maybe from the drain-plug where the heater-core is.
Posted on May 13, 2010
First-get a new mechanic
Do a cylinder leakdown test
Put in dye designed for the coolant system
Do a pressure test on coolant system
There are other products and tests that can be done.
Posted on May 12, 2010
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Posted on Jan 02, 2017
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