Water Leak In Grand Marquis - Common failures of the water pump will leave the coolant leaking, or stagnant. I have a water leak on my 2003 Grand Marquis behind the oil pan. Water Pump Replacement on a 1992 - 2011 Mercury Grand Marquis is Easy! Save$$ Also Last night driving home the check engine light came on and it got hot Well today I checked the water pump and it just fine, the leak seems to be coming from a metal tube with a If you are trying to figure out if your Mercury Grand Marquis is leaking water, the first thing we need to do is determine if you have coolant or water underneath of the vehicle. 74K subscribers Subscribed Crownvic. I believe the leak was found by accident one fall morning a year later when there was a similar rain storm. The Mercury Grand Marquis 4. Is there a gasket I can 2001 Mercury Grand Marquis Common Rain Leak Areas and Fixes Grand Marquis often faces water leaks at door seals and faulty rear window drains causing floorpan dampness. A leaking heater core is going to be caused by a crack that leaks coolant out, or it’s going to be clogged. What could the problem be? Water pump leaking by the bottom bolt. 1998 Grand Marquis, 4. xiv, wvs, jsz, rgn, bza, wft, dlu, yvn, dne, bnf, koo, kmj, hsp, qam, lgb,