1994 Grand Marquis is over heating it has a pin hole at the back of the engine small hose that clamps to the engine there is a pin hole right under the hose that hose connects to the Temperature-sensing electric heater control valve and the engine i put JB weld on the hole it runs for 30 minutes then steam come out were the hole is and the engine gets hot.
engine get hot on 1994 Mercury Grand Marquis
by buckiejr in Plymouth, OH on January 23, 2011
ANSWER by DaveJHM on January 24, 2011
First, it seems like you may want to repair this leak once and for all. Replace whatever is leaking with new parts. JB Weld is not going to help... Once you have repaired the integrity of the cooling system, recheck for further overheating or other issues.
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