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Old 25-03-2011, 11:47 AM   #1
ripper29
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Default 3.9 to 4lt

hi to all me and mate are looking to go from 3.9 to 4lt car1 is a 5speed ea, the other is a 4speed na. The question i have is what sort of problems would we run it to. Any info would be helpful and apreciated

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Old 25-03-2011, 12:17 PM   #2
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Default Re: 3.9 to 4lt

Can anyone decypher this?
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Old 25-03-2011, 12:23 PM   #3
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by sleek7
Can anyone decypher this?



H1 2 4LL M3 ND M8 R LO0K1N 2 G0 FRM 3.9 2 4L7 C4R 1 IZA 5SPD EA DA OTHA IZ A 4SPD NA DA QUEZTON I HAZ IS WOT S0R7 OV PROBZ WUD W3 RUN INTA LOL NE INFOZ WUD B HELPFAL ND 4Pr3(1473d
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Old 25-03-2011, 12:30 PM   #4
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Default Re: 3.9 to 4lt

They wanna replace the 3.9 with a 4.0 out of a car with a 4sp auto.

Youll need a 6 bolt flywheel and clutch kit to suit as the EA only has a 3 bolt flywheel.
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Old 25-03-2011, 12:53 PM   #5
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by TEaaron
H1 2 4LL M3 ND M8 R LO0K1N 2 G0 FRM 3.9 2 4L7 C4R 1 IZA 5SPD EA DA OTHA IZ A 4SPD NA DA QUEZTON I HAZ IS WOT S0R7 OV PROBZ WUD W3 RUN INTA LOL NE INFOZ WUD B HELPFAL ND 4Pr3(1473d
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Old 26-03-2011, 08:24 AM   #6
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by TEaaron
H1 2 4LL M3 ND M8 R LO0K1N 2 G0 FRM 3.9 2 4L7 C4R 1 IZA 5SPD EA DA OTHA IZ A 4SPD NA DA QUEZTON I HAZ IS WOT S0R7 OV PROBZ WUD W3 RUN INTA LOL NE INFOZ WUD B HELPFAL ND 4Pr3(1473d
After trying to read that, is it possible to have my 5 mins back?
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Old 26-03-2011, 08:52 AM   #7
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Default Re: 3.9 to 4lt

I think its two cars currently running 3.9 one being a manual and one being an auto. The two mates are considering changing the 3.9's to 4.0's and this fellow is asking if there are any known problems.
I think we need to be careful about behaviours that make new members feel unwelcome or alienate them from this site, now can someone with experience of this conversion advise this fellow?

I have not done the conversion, but with EA's approaching 23 years of age you wouldnt do it on the basis of economics? But if you can do the work yourself and the parts are cheap the MPFI 4.0 is superior to the CFI 3.9
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Old 26-03-2011, 10:05 AM   #8
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Default Re: 3.9 to 4lt

Didn't the EB II 4.0 have a different bell housing bolt pattern?

IIRC, the ECU had the auto trans module included where as the
trans module was separate on EA and EB I
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Old 26-03-2011, 10:46 AM   #9
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Default Re: 3.9 to 4lt

Why would he need an auto trans module when its going into a 5 speed?

The motor will swap straight over. The bellhousings and flywheels will all fit fine.

Quote:
Originally Posted by Linkachu
Youll need a 6 bolt flywheel and clutch kit to suit as the EA only has a 3 bolt flywheel.
This is wrong. The 3 bolt flywheel will fit the later model, just use the original clutch.

The 3 and 6 bolt thing relates to how many bolts the clutch uses to bolt to the flywheel, not how many bolts the flywheel uses to bolt to the engine.
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Old 26-03-2011, 10:52 AM   #10
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Default Re: 3.9 to 4lt

I've still got a 3 bolt flywheel / clutch in my EA. And you say the 4 litre is coming out of an NA? Considering an NA is the Fairlane equivalent to the EA, it should have a 3.9 litre anyway! Any EBII-EL 4 litre will bolt straight in. AU will bolt in if you grind fins off the front of the sump.
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Old 26-03-2011, 01:10 PM   #11
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by dansedgli
Why would he need an auto trans module when its going into a 5 speed?
You didn't read the opening post, car 1 was a 5-speed manual and the other is a 4-speed auto.
Quote:
The motor will swap straight over. The bellhousings and flywheels will all fit fine.
EB-AU has a different bell housing bolt pattern to EA..
Back in 1998, we ran into this problem trying to put a 4.0 into my brother in law's EA.
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Old 26-03-2011, 01:24 PM   #12
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by jpd80
You didn't read the opening post, car 1 was a 5-speed manual and the other is a 4-speed auto.
He is only swapping the 4 litre motor over from what I can comprehend. If you only swap the motors over nothing has to be changed for the transmission.

Quote:
Originally Posted by jpd80
EB-AU has a different bell housing bolt pattern to EA..
Back in 1998, we ran into this problem trying to put a 4.0 into my brother in law's EA.
EA-EL is the same. AU onwards is different. The only difference is the lower 2 bolt holes. Many just do without those 2 bolts. They are only small.

1998 was a long time ago, maybe you are thinking of something else.
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Old 26-03-2011, 02:17 PM   #13
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by dansedgli
He is only swapping the 4 litre motor over from what I can comprehend. If you only swap the motors over nothing has to be changed for the transmission.



EA-EL is the same. AU onwards is different. The only difference is the lower 2 bolt holes. Many just do without those 2 bolts. They are only small.

1998 was a long time ago, maybe you are thinking of something else.
We got the engine out of a wreck, I'm wondering if it was one of those EL-AU hybrid
things when the Factory was changing over stuff. Anyway, we swapped it for another
OHC and the second one went in fine...

Sorry about the mix up I thought it was two mates wanting to swap 4.0s into both their cars...
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Old 27-03-2011, 07:58 PM   #14
ripper29
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Default Re: 3.9 to 4lt

im sorry if my question dint make sense. i have a 3.9 ea with a 5 speed gearbox my motor is beyond repair and looking to put a 4lt in the ea.
My mate has a na fairlane he cooked the motor in that one and wants to put a 4lt in his na and his is an auto. And would like to know if there is any problems i would run in to.
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Old 27-06-2011, 09:30 PM   #15
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Default Re: 3.9 to 4lt

I'm going to bump this cause I want to know how they went

but appreciated was epic
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Old 28-06-2011, 09:11 AM   #16
xisled
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by TEaaron
H1 2 4LL M3 ND M8 R LO0K1N 2 G0 FRM 3.9 2 4L7 C4R 1 IZA 5SPD EA DA OTHA IZ A 4SPD NA DA QUEZTON I HAZ IS WOT S0R7 OV PROBZ WUD W3 RUN INTA LOL NE INFOZ WUD B HELPFAL ND 4Pr3(1473d

Can I have my 1 minute of life back trying to read that? LOL.
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Old 28-06-2011, 01:55 PM   #17
The G6ET Spot
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Default Re: 3.9 to 4lt

Quote:
Originally Posted by TEaaron
H1 2 4LL M3 ND M8 R LO0K1N 2 G0 FRM 3.9 2 4L7 C4R 1 IZA 5SPD EA DA OTHA IZ A 4SPD NA DA QUEZTON I HAZ IS WOT S0R7 OV PROBZ WUD W3 RUN INTA LOL NE INFOZ WUD B HELPFAL ND 4Pr3(1473d
There must be something wrong with me. I made more sense out of that than the original post.
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