Will an AU head gasket fit on a EA 3.9L motor? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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post #1 of 11 (permalink) Old 11-16-03, 11:03 AM Thread Starter
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Will an AU head gasket fit on a EA 3.9L motor?

Heard that those steel gasket in AU is far superior to those used on EA, will they fit on a EA 3.9L? how do they compared to ACL monotorque gaskets?

I'm trying to ask the dealer to replace my head gasket before it goes wrong...............



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post #2 of 11 (permalink) Old 11-16-03, 02:12 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

dunno, but i am running a au head with a ea gasket with a ef block here, so i i'd say yes.

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post #3 of 11 (permalink) Old 11-16-03, 08:43 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

I dont no for sure, but i would lean towards yes. I do know that an AU head will bolt on to a EF engine and i know a EF head will bolt on to a EA. So if the heads are bolt on, thenn the gasket should also have no problems.

Please correct me if im wrong.

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post #4 of 11 (permalink) Old 11-16-03, 09:00 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

Don't worry about replacing it until it actually goes. I mean, it's not imperative to take precautionary measures with a headgasket. Unless they blow really bad, and water is pouring out the side, you can usually drive with them fubar for a while..
 
post #5 of 11 (permalink) Old 11-16-03, 09:07 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

yeah the head gasket will fit cause all the heads gaskets from ea-au are almost the same
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post #6 of 11 (permalink) Old 11-16-03, 11:27 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

The AU head gaskets are thinner, and as a result will increase your compression slightly. But yes they'll fit.

Alex
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post #7 of 11 (permalink) Old 11-18-03, 05:20 PM Thread Starter
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Re: Will an AU head gasket fit on a EA 3.9L motor?

Nah, I've just got the car and wanna make sure the gasket isn't blown or going to blow, coz I can ask the dealer to fix that if necessary.

BTW, just some observation, I found out that coolant will burst out of the overflow bottle if the cap is opened and I rev up the engine. Is it normal or I should get a pro to have a look?


Agile Falcon
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post #8 of 11 (permalink) Old 11-18-03, 05:40 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

Sounds like exhaust gasses leaking into the cooling system? Only if its doing it a lot - its normal to see a small of a rise as the water pump spins faster.

A mechanic can put in some sort of additive to see if theres exhaust gasses getting into the cooling system - worth checking out.

Jase
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post #9 of 11 (permalink) Old 11-18-03, 05:50 PM Thread Starter
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Re: Will an AU head gasket fit on a EA 3.9L motor?

Just an extra question, how much water rise should be see as normal?


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1988 NA Fairlane Series I

- 3.9L MPI Engine with 4.0L Equivalent Head
- Old Trusty 3 Speed BW M51 Auto
- Rear Sonar Sensor
- Cheapo CD Player
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post #10 of 11 (permalink) Old 11-18-03, 07:23 PM
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Re: Will an AU head gasket fit on a EA 3.9L motor?

If it shoots straight up, you have a problem :)
If it just overflows gently, this would be about right.

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