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Old 03-21-2007   #1 (permalink)
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Default 1999 Mustang 3.8l swap to 2003 Mustang 3.8l HELP

The enging is just about dead on my 99 convertible. I fould a great deal on a 2003 3.8l engine. is it a big pain swapping these engine
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Old 03-21-2007   #2 (permalink)
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Originally Posted by vmax350 View Post
The enging is just about dead on my 99 convertible. I fould a great deal on a 2003 3.8l engine. is it a big pain swapping these engine
It will be a pain in that it will take time to unbolt the tranny, remove all the accesories, lift the motor, then do that in reverse; but the new motor will fit the same as the one thats in there.
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Old 03-21-2007   #3 (permalink)
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what tex said, same engine I believe, if you have a crane and the necessary tools this is resonably an easy job, don't really have to be mechanically inclined, just unbolt and rebolt, just look at some to-do's to make sure you don't want to unbolt something that may resilt in a negative affect.
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Old 03-21-2007   #4 (permalink)
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what tex said, same engine I believe, if you have a crane and the necessary tools this is resonably an easy job, don't really have to be mechanically inclined, just unbolt and rebolt, just look at some to-do's to make sure you don't want to unbolt something that may resilt in a negative affect.
right, to-do books are great. find a haynes manual for your year model and should tell you about everything you need to know.
You can pick one up at most auto parts stores.
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Old 03-21-2007   #5 (permalink)
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Default 1999 3.8l swap to 2003 3.8l HELP

Thanks I wasn't sure about emissions and cpu
the enigine didn't come up on an interchange list
for the 1999
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Old 03-21-2007   #6 (permalink)
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It will be a pain in that it will take time to unbolt the tranny, remove all the accesories, lift the motor, then do that in reverse; but the new motor will fit the same as the one thats in there.
I don't think you'd have to remove the accessories -there's a lot of space in front.

But make sure you keep the lower intake manifold off of your 1999. The IMRC on the 03 will drive you and your computer crazy.
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Old 03-21-2007   #7 (permalink)
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Thanks I wasn't sure about emissions and cpu
the enigine didn't come up on an interchange list
for the 1999
The only change you need to be aware of is the IMRC issue re: CPU. Just use the one from your 1999.
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Old 03-21-2007   #8 (permalink)
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why not get a port and polish while your at it?
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Old 03-21-2007   #9 (permalink)
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Good call KS.... Forgot about the IMRC. Changing motors can be fun with the right tools/facilities.
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Old 03-21-2007   #10 (permalink)
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Quote:
Originally Posted by kscoyote View Post
I don't think you'd have to remove the accessories -there's a lot of space in front.

But make sure you keep the lower intake manifold off of your 1999. The IMRC on the 03 will drive you and your computer crazy.
yeah there is quite a bit of room in there being it was built for the v8...grrr.

why did ford put in the IMRC in the newer v6's if the motor was practically identical?
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Old 03-21-2007   #11 (permalink)
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good question why did ford do that?
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Old 03-22-2007   #12 (permalink)
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Increased low end torque by 20 ft. lbs.

The 2001 + cars are not as susceptible to losing a bunch of torque at 2.5" on exhaust for that reason . ..

1999-2001 cars had 225 ft/lbs, the 2002-2004 cars had 245 ft/lbs.
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Old 03-22-2007   #13 (permalink)
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This might just be me, but if you've never done it before, label everything and take digital pictures. This will help in the reinstalltion procedures. Oh and get a bunch of zip-lok bags for nut/bolt labelling. There is nothing worse than spending hours trying to figure out which nuts/bolts go where.
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Old 03-22-2007   #14 (permalink)
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Quote:
Originally Posted by kscoyote View Post
Increased low end torque by 20 ft. lbs.

The 2001 + cars are not as susceptible to losing a bunch of torque at 2.5" on exhaust for that reason . ..

1999-2001 cars had 225 ft/lbs, the 2002-2004 cars had 245 ft/lbs.
well thats a better reason then what I was expecting, I figured it might have had to do with emissions or some other pointless crap. Gets on my nerves when they screw with something just for better emissions.
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Old 03-22-2007   #15 (permalink)
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Taking pictures is a great idea... I wish i would have done it a few times...
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