Antifreeze leak on a 1997 Mustang GT Convertible - Ford Mustang Forums
 
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post #1 of 14 (permalink) Old 10-29-2007 Thread Starter
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Antifreeze leak on a 1997 Mustang GT Convertible

Hello,

Its my first post, and in a desperate need of assistance

Anyway, here is whats going on - Yestrday I was driving to work, and I did step on it a little... So when I got to work, I parked the car. 2hrs later when I went on lunch i noticed a puddle under my car.

It is leaking antifreeze, and its strange since its leaking between the engine ( back ) and the firewall...

I am not sure exactly what is going on. I checked the hoses up front and inspected the manifold which has water stains... I also noticed a stain on my Thermostat Cover... I am trying to find out what could be the issue here. I did my best to search the forums - however I did not find anything, or at least tried my best.

Any help would be greatly apriciated before I take the car to the shop.

Thanks,

Aleks
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post #2 of 14 (permalink) Old 10-29-2007
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Hiya, welcome to the site.
I'm sure some of the 4.6 members will be able to help you out. I do know the factory plastic intake is very common to have coolant leaks at both the front and back.

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post #3 of 14 (permalink) Old 10-29-2007
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if the leak is towards the rear, I'd suspect the rear plastic coolant nipple or a heater hose issue......if the leak were towards the front...cut n' dry, cracked coolant cross-over on the intake...now one thing you can-do is goto a parts store and get some coolant system dye, add it to the coolant system, run the engine and then hit the intake wth a "black light" this should pin-point the leak
post #4 of 14 (permalink) Old 10-29-2007 Thread Starter
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Thanks for the prompt response, yeah whats strange I had my car die because of bad cats ( was clogged ) and when BERGE FORD inspected they mentioned a cracked INTAKE MANIFOLD. Now I am hoping that is not the case... Either way any input will be apriciated.
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post #5 of 14 (permalink) Old 10-29-2007 Thread Starter
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Any black light should do the trick? In case it is a manifold, what would you guys recommend?

I know that there is a new 99-04 production intake and that will require new PI heads. Which atm is out of my reach financially.

I also found an original Manifold for the 96-98 models on 50resto.com

Any other suggestions?
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post #6 of 14 (permalink) Old 10-30-2007
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yes, any black light will work...now FoMoCo has an improved intakes for PI and Non-Pi but only improved as far as the coolant cross-over...both still use the same plastic nipple for the heater hose at the rear of the intake...you can-do the PI intake swap wthout doing the head swap, it does require @$80.00 worth of parts (lesss an intake) and a little RTV to seal-up the ports....
post #7 of 14 (permalink) Old 10-30-2007 Thread Starter
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Hmm sounds interesting... Well I got the car looked at by a local shop and it ends up being that my INTAKE MANIFOLD HAS CRACKED towards the back about 1" where the last bolt bolts on after the final injector on the Driver side.

I heard that ford did a recall on this issue, would I be able to qualify for this? If so how?

Now about the intake w/o the PI heads - it sounds interesting but kind of want to save the upgrade when I do go with PI heads later on.

So can I just get a original 96-98 manifold and should do the trick w/o any modifications?

Thanks again for all your help.
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post #8 of 14 (permalink) Old 10-30-2007
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Quote:
Originally Posted by GW-SMokeY View Post
Hmm sounds interesting... Well I got the car looked at by a local shop and it ends up being that my INTAKE MANIFOLD HAS CRACKED towards the back about 1" where the last bolt bolts on after the final injector on the Driver side.

I heard that ford did a recall on this issue, would I be able to qualify for this? If so how?

Now about the intake w/o the PI heads - it sounds interesting but kind of want to save the upgrade when I do go with PI heads later on.

So can I just get a original 96-98 manifold and should do the trick w/o any modifications?

Thanks again for all your help.

Hey GW,

I think the recall finally lapsed on the intakes. I had mine go bad back in 2000 and they still honored it. You might be able to confirm that with a dealer and maybe sweet talk them into a discount or something. Even if money is an issue I would try to upgrade from the stock part. You don't want this to happen again in the future. Do a search here on intakes and you'll get lots of great info.

Good luck!
post #9 of 14 (permalink) Old 11-01-2007
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I had to do the intake swap on a 96 GT that I used to have. It had the classic leak at the coolant intake crossover.

Ford will no longer honor that recall.

I bought the replacement kit off of ebay. If you go to Ford it was like $400 for the kit. I paid like $200 for the kit if I remember right. It was not a horrible job if your motor savay at all. I had it apart for about 4 days as I could only work on it at nights after work.

Seemed like ford service wanted like $800 or $900 to do the job. So I did it myself.

Let me know if you decide to do it yourself. Ill give you some help by email.
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I'm in the process of replacing the intake on mine. I had a quick question about the thermostat O-ring. Shame on me for not paying attention when I took it apart, but does the O-ring go down in the intake on top of the thermostat or around the lip on the hose connector?

Thanks in advance!

97 GT Convertible 4.6 Auto
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I dont think it matters. If I remember right the O-ring had no sides and is round on the edges.
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post #12 of 14 (permalink) Old 11-16-2007 Thread Starter
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Hey so I did the Swap my self. Bought the manifold from 5.0 resto. Its the direct replacment for the ford 96-98 w/ improved thermostat front.

Well, the car seems to function fine. I did not change the O ring's around the injectors. Followed the exact instrctions. 18ft/lb torque per bolt in the specific pattern.

So the car runs ok and all... Now for some odd reason when i really step on it it chugs, as if it skips or miss fires. Then sometimes it works fine... Could it be faulty Spark Plugs? Wiring? I checked all the smog connections,and all the sensors... Everything is where it should be.

Any suggestions? I do have clogged Cats that will be worked on next week..

Thanks guys!

P.S it did mention that if injectors not seated right could be possible vacum leak?

Should i just take it to ford for diagnostics?
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post #13 of 14 (permalink) Old 11-18-2007 Thread Starter
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Looks like my summit dorman intake manifold did not come with o rings, and I will have to get them shipped. Possible vacum leak.
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I responded to your PM so check that, but I just saw in your post where you mentioned some clogged catalytic converters. If youre having some pressure issues in your exhaust that could create some definate issues like your describing.

Was it doing that before you swapped the intakes or not?

Either way Id get that exhaust problem resolved before you start beating yourself up trying to diagnose any other issues.
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