What could cause my 88 Mustang GT to mysteriously lose antifreeze? - Ford Mustang Forum
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post #1 of 16 (permalink) Old 03-30-2003 Thread Starter
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Anti-Freeze Dissapearing Act!!!???

My 88 Mustang GT is mysterisly losing antifreeze? I'll wake up in the morning fill it up drive around then have to fill it the next morning. I realized the problem, had it pressure tested and they said it was blowing out of the neck or the radiator and that the cap was bad. The guy being a friend of mine replaced it with a heavy duty radiotor, not name brand, and the same thing is still happening. I replaced the thermostat with a 180d then he replaced it with a 190d. I brought it back to get another pressure test, he ran it for 2hr!! and NOTHING SHOWED UP!? But there has to be something wrong with it!! One thing that might be helpfull is that i was driving on the highway for a while after just filling it. Came home then let it cool, checked it and it was dangerously low. So heat i'm guessing is a factor. My mechanic friend said that since i have E303 cams that maybe that is the reason. IDK, please help!


In case it helps, MOD's
1988 Mustang GT Hatch
-E303
-Headers
-H-Pipe w/ Cats
-2 Chamber Flowmaster
-B&M Short Throw Shifter
-4:10
-I think i have bigger injectors not sure of size
-new pushrods
-new rollerrockers
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post #2 of 16 (permalink) Old 03-30-2003
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Re: Anti-Freeze Dissapearing Act!!!???

Quote:
Originally posted by HandyCappedkid
My mechanic friend said that since i have E303 cams that maybe that is the reason. IDK, please help!
You only have 1 cam You are leakin the antifreeze some where . What does your oil look like ? May be a head gasket .

Never argue with an idiot. They will bring you down to their level and beat you with experience...
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post #3 of 16 (permalink) Old 03-30-2003
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check in the oil, under the car, everywhere! one place it could disappear and is hard to find is in the EGR plate.....some might be goint through the engine and out the pipes
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post #4 of 16 (permalink) Old 03-30-2003
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If it is an auto it could get to the tranny through the rdiator also . Not likely but check it anyways to be safe

Never argue with an idiot. They will bring you down to their level and beat you with experience...
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post #5 of 16 (permalink) Old 03-30-2003
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I second the motion on possible head gasket. Same thing happen with my g/f's car ('99 Olds Cutlass, 3.1L-prone to headgasket problems). She would drive a little and low coolant came on...so we filled it up. Day and a half later light came on again, told her to have it looked at since the car was still under the initial 90 day warranty. Ended up being busted intake gasket. it was leaking slowly as she drove and burned up once it hit the block. Could notice the smell, but it wasn't too strong.

'98 Camaro Z28 M6
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post #6 of 16 (permalink) Old 03-30-2003
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I have a 94 and the same thing was happing to me.Could not find a leak
under or around but at times could smell anti freeze.Turns out I found the leak behind the timing cover, it would hit the block and dry. Hopes this helps.

94 GT - 65 tb, kn filter, Edelbrock upper lower, flowmasters, saleen springs,dual piston calipers,AODE trans with reworked
valve body.Heads to come.
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post #7 of 16 (permalink) Old 03-30-2003 Thread Starter
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Thanx, there are no leaks around the car at all, I checked that. But i'll have the head gasket checked out. My oil is fine, so it's not leakin into there. And I dont smell anti-freeze. Thanx for the help, I hope it's not to expensive to fix

88 Mustang GT 5-spd Hatch
-K&N Intake
-E303 Cam
-Shorty Headers
-Mass Air Conversion
-H-Pipe w/cats
-Flowmasters
-B&M Short Throw
-4:10
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post #8 of 16 (permalink) Old 03-30-2003
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check the EGR plate first, these are known to leak into the intake
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post #9 of 16 (permalink) Old 03-31-2003 Thread Starter
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Is the EGR plate what the TB is connected to?? And how exactly would i go about checking the EGR plate? Do i disconnect the TB and look for antifreeze??????

88 Mustang GT 5-spd Hatch
-K&N Intake
-E303 Cam
-Shorty Headers
-Mass Air Conversion
-H-Pipe w/cats
-Flowmasters
-B&M Short Throw
-4:10
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bypass the water hoses that are going into the intake, if this stops the leaking then you know that it is your problem.
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Im assuming there are no puddles of antifreeze inside the car?

04 Torch Red Cobra 'vert. 497 hp / 480 ft/lbs
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Quote:
Originally posted by DavidH
bypass the water hoses that are going into the intake, if this stops the leaking then you know that it is your problem.
Dont drive it like that . The coolant lines are there for a reason . Your egr will get too hot and your car may run like crap .

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i think i may have the same problem, i guess i will have to look into it when i swap my intake.the motor is new though,and so is the heater core.

89' LX new motor, from pan to intake,e-303 cam,gt-40p heads,1.6 roller rockers,2 chamber flowmasters, MAC catalytic h-pipe,24lb inj.C&L mass air,stock intake , 65mm t.body,FLUIDAMPR,new egr,tps and iabp,190lph BBK pump, Adj. Regulator,160 amp alternator
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Uuuuuh, your heater core might also be leaking. They are prone to leaking and I think the anti-freeze leaks out the A/C drain hole near the passenger side front wheel.

Turn on your heater and see if it stinks like anti-freeze.

91 GT convertible AOD B&M shiftkit 3.27
89 LX 5.0 hatchback T5 2.73
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usually with a heater core , the defrost actually fogs the hell out of the windows . And it stinks like crap.

Never argue with an idiot. They will bring you down to their level and beat you with experience...
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