Overheating

40

Asked by Apr 01, 2017 at 08:38 PM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

I have replaced all hoses, the radiator, the
water pump, thermostat, and reservoir tank
and it is still loosing coolant. I can't see any
visible leaks anywhere, what could be the
problem

11 Answers

75,525

2 things...did you purge the cooling system after refilling it? and do you notice a lot of white, sweet smelling exhaust out the tail pipe?

1 of 1 people found this helpful.
40

I did purge it and there's not a lot of sweet smelling exhaust but I did see some white smoke and water come out of the exhaust mid day

1 of 1 people found this helpful.
75,525

But you smell a sweet smell? That would be coolant burning off in the cylinders. Water dripping out the tail pipe is just condensation.

1 of 1 people found this helpful.
40

Yes it's kind of a sweet smell

1 of 1 people found this helpful.
75,525

Sounds like a head gasket then.

1 of 1 people found this helpful.
40

Ok what's the best way to confirm that so I can solve the situation

1 of 1 people found this helpful.
75,525

Doing a compression test on the engine will show some low cylinders, or have the cooling system pressure tested. Taking it to a shop to have it verified would be the best thing to do.

1 of 1 people found this helpful.
40

Ok I appreciate the advice a lot thank you

1 of 1 people found this helpful.
75,525

Your welcome.

1 of 1 people found this helpful.

How to drain radiator

75,525

Open the pet-cock on the bottom of the radiator.

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