The overflow saga continues...

J

JJM_Stanger

New Member

Jun 24, 2003

74

0

0

York, Pa

Jun 16, 2005

#1

• Jun 16, 2005

• #1

I recently had a post about a problem I’m having with my Stang. To make a long story short I had it out Sunday for about a 2 hour drive and when I got back I saw it was dripping antifreeze. I popped the hood and it was overflowing from the overflow. After the first post I did a compression test to see if it blew a head gasket, here are the results:

# 1: 150 psi
# 2: 149 psi
# 3: 150 psi
# 4: 148 psi
# 5: 147 psi
# 6: 150 psi
# 7: 149 psi
# 8: 150 psi

So everything looks good there, right? Can someone tell me what the compression is stock? 1990 GT..? So the compression test did not show a blown head gasket what else could it be? I don't see any obviouse leaks?

Any ideas?

 

J

JJM_Stanger

New Member

Jun 24, 2003

74

0

0

York, Pa

Jun 16, 2005

#2

• Jun 16, 2005

• #2

Can someone at least tell me what the stock compression should be?

 

T

tjm73

Founding Member

Aug 3, 2000

2,418

2

48

Rush, NY

Jun 16, 2005

#3

• Jun 16, 2005

• #3

I think it's 8.8:1 if I remember correctly.

If you're puking coolant check your radiator cap. I had the same problem and I put a new radiator cap on and changed the thermostat and it hasn't done it since.

 

J

jerryD

Founding Member

Mar 16, 2000

1,061

0

37

Gladstone, MO

Jun 16, 2005

#4

• Jun 16, 2005

• #4

check your rad cap. it may not be releasing the pressure built up, and the pressure has to go somewhere. as long as you aren't over heating the thermostat should be fine.

 

ALMOSTFINISHED

Member

Jan 8, 2004

315

0

17

Westchester County NY

Jun 16, 2005

#5

• Jun 16, 2005

• #5

I have almost the exact same problem. If I drive nicely the temp stays around 185, (autometer guage and 180 t-stat). Once I start to drive a bit "spirited" the temp will go upwards towards 200. Not that I beat on the car or anything, just a full 3/4 throttle passings or other cars. I have a newer be cool aluminum rad, and a new cap. My car does the same as yours tho, overflows outa the tank. Almost like the car boils over but never gets to that temp. Maybe we have the same problem. ?

Nick

 

Curse

Member

Apr 8, 2004

791

2

16

El Paso, TX

Jun 16, 2005

#6

• Jun 16, 2005

• #6

You guys sure the T-stat is working? My car did something similar, changed my cheap 180* T-stat to a Mr. Gasket 180* never had another problem with it.

 

ALMOSTFINISHED

Member

Jan 8, 2004

315

0

17

Westchester County NY

Jun 16, 2005

#7

• Jun 16, 2005

• #7

I've thought about changing the t-stat out to a mr gasket one. I should tackle that this weekend and see where it gets me. Thanks for the suggestion.

Nick

 

Curse

Member

Apr 8, 2004

791

2

16

El Paso, TX

Jun 16, 2005

#8

• Jun 16, 2005

• #8

No problem, good luck!

 

I

iapexl8r

Member

Apr 1, 2005

254

0

17

Jun 16, 2005

#9

• Jun 16, 2005

• #9

try drilling a 1/8 th hole at the top (12:00) pos on the thermostat its called a burp hole. chris

 

ALMOSTFINISHED

Member

Jan 8, 2004

315

0

17

Westchester County NY

Jun 16, 2005

#10

• Jun 16, 2005

• #10

I'll give ya a bump.

Nick

 

J

JJM_Stanger

New Member

Jun 24, 2003

74

0

0

York, Pa

Jun 17, 2005

#11

• Jun 17, 2005

• #11

I replaced my t-stat and water pump last year, so I wouldn't think it would be those. I'll try the radiator cap and maybe another t-stat.

ALMOSTFINISHED - If you find the problem let me know, I'll do the same.

 

1

1989MustangLX

New Member

Apr 7, 2005

118

0

0

Canada

Jun 17, 2005

#12

• Jun 17, 2005

• #12

iapexl8r said:

try drilling a 1/8 th hole at the top (12:00) pos on the thermostat its called a burp hole. chris

Click to expand...

Does anyone else recommend doing this? I've heard of it before, and it sounds like a good idea.