1998 Ford Mustang Coolant overflow!

DANA1

MEMBER
1998 FORD MUSTANG
6 CYL
FWD
AUTOMATIC
17,000 MILES

My mustang recently overheated and was diagnosed to be the intake that was leaking. After the intake was taken apart there was a freeze plug that seemed to be leaking. They were both repaired and now when I try to start it the coolant pours out of the radiator and the resevoir as the engine cranks! Any idea of what the problem can be?

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

Water pumping out the filler is a sign of a fairly bad head gasket, this is compression pressure entering the cooling system.

Mark (mhpautos)

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Tuesday, June 15th, 2010 AT 12:57 AM

DANA1

MEMBER
2 POSTS

But there is no milky stuff on the oil cap or on the dipstick! Is it possible that it may be something else?

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Tuesday, June 15th, 2010 AT 1:39 AM

MHPAUTOS

MECHANIC
31,937 POSTS

It may be a very blocked radiator, but the way the water reacts is some what different, if you have a pumping effect this is usually compression leaking into the coolant, often this is a head gasket blown between 2 cylinders, there is no oil gallery involved and in the early stages water pressure will not add to much coolant into the combustion chamber, but compression will pump into the coolant, a head check will prove this one way or the other, this is a simple chemical test to check for Co in the cooling system.

Mark (mhpautos)

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Tuesday, June 15th, 2010 AT 4:09 AM