What's going on with my car?

[68stang351]

Yesterday, I noticed there is a puddle of antifreeze under my car. It's not under the radiator or any hoses, but under the block.
I thought it was a freeze plug, the last one in the side of the block that I can't see or reach. But the motor is only about 15 months old, and I've never run straight water, so I know it's not rusted.

Today I put about 3/4 of a gallon of water in it and let it set there until it got to 190 degrees, thinking that surely if there's a leak, it will leak with the car warmed up. I even held it a 2k rpm's to build up pressure.
Nothing. No leaks. Not a drop.

What's the deal?
Any ideas?

 

[FIRE14142002]

 

[FIRE14142002]

Could Be As Simple As The Intake Bolts Are A Little Loose And It Is Able To Seep Out When It Is Cold And The Is More Clearance Between The Gasket And The Head Or Intake. I A Similar Leak And It Was A Slightly Loose Intake Bolt.

 

[SuperDave]

If you can't duplicate the problem, why worry about it? Keep an eye on it and see if it happens again. Getting paranoid won't help unless it makes you feel better.

 

[12sec67]

it could be a the intake,thermostat,or heater hoses?

good luck!

 

[68GEETEE]

mine leaks out of the rubber overflow hose that goes out the filler neck and down the side of the radiator. ITs common on old Stangs. THey sell a thin coolant recovery bottle that can mount in the small space along side the radiator to help stop coolant loss. If its coming from the intake, then ignore this post.

 

[RGS0907]

Yesterday, I noticed there is a puddle of antifreeze under my car. It's not under the radiator or any hoses, but under the block.
I thought it was a freeze plug, the last one in the side of the block that I can't see or reach. But the motor is only about 15 months old, and I've never run straight water, so I know it's not rusted.

Today I put about 3/4 of a gallon of water in it and let it set there until it got to 190 degrees, thinking that surely if there's a leak, it will leak with the car warmed up. I even held it a 2k rpm's to build up pressure.
Nothing. No leaks. Not a drop.

What's the deal?
Any ideas?

It could be the sending unit for the engine temperature guage (or idiot light).. They tend to leak sometimes.