Mustang engine swap

GMC guy

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#1
Make
Ford
Model
Mustang
Year
2006
Miles
110k
Engine
4.0
Hey y’all. Got a 06 mustang with 4.0 standard tranny. Engine siezed. Putting another engine that had an automatic tranny on it. It had a smaller thinner flywheel and what looks like a spacer with the 7 flywheel holes.
I am putting original clutch flywheel which has the pilot bearing in it. I look into both crank holes and they look the same. Like they both have bushings in them. Do 4.0 mustang automatics have bushings? And can i just put clutch and standard tranny like it is?
 

nickb2

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#2
I see no reason why this wouldn't work. It would be crazy make two different engines for auto and standard. I would just be sure to have the right bolts for the crank/flywheel. That would be the only place I would be leery on.

Since you have the standard bolts already, just make sure they go back on that engine. I am not sure, but the flexplate bolts may be shorter than the flywheel on your standard. Apart from that, all bolt on the rest of the way.
 

nickb2

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#3
But I am highly suspecting that the spacer which is for auto trans only accounts for the length of the of the bolts needed for the flywheel. I check the torque, it is the same for auto and standard.

But the thing is, my alldata is giving me 8 bolt crank for both auto and manual for the 4.0l, see snapshots taken from my alldata.

Are you sure you counted right?

1st snap is for manual, second is for flex-plate auto. 3rd shows spacer which is for auto trans only, so I wouldn't worry about the bolt leangth, but just double check any way, If you have 7 bolt crank, either my alldata is wrong and my memory is wrong, cuz I do have memory of doing both auto and manual on these era cars, but never a interchange from auto to manual, but I always remember 8 bolt cranks. I think you counted wrong, or you got the wrong 4.0l for this mustang. Screenshot (207).png Screenshot (208).png


Screenshot (209).png
 

nickb2

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#5
I even checked for the different 4.0l of this era, ones in the ranger for example. One is a vin # n (stang) the other a vin# e (ranger) and still both have 8 bolt cranks. Just make sure your 4.0l came from a vin # n.
 

jd

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#6
Are these 4.0's the Ford of Germany "Cologne Engine" with overhead cams? With the chain pack on the REAR of one of the heads?

You don't say how the original 4.0 seized, but those engines are problematic in that the chain packs start failing over 100,000. And engine has to be pulled because you can't access that rear pack with engine in place. If you're satisfied this donor engine 1. will fit and 2. is otherwise good, could be a good investment to put a new timing set in. Before it gets really hard to access...
 

GMC guy

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#7
Sorry Nickb2 and JD. Yes, 8 bolts. Thank you for the info. Very helpful. My main concern is the bushing. I was looking at youtube videos and some were saying automatics dont have the bushings so the torque can fit in the crank. And it sure looks like the old and replacement engine both have the bushings
 

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billr

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#8
"I am putting original clutch flywheel which has the pilot bearing in it."

That has me confused. If the pilot bearing is in the flywheel, why are you expecting one in the crank? I don't see a pilot bearing in either of those crank pictures. Some manual clutch arrangements don't even use a pilot bearing.

A bit off-topic, but my understanding is that Chrysler did use two different cranks/engines the '60s. The cranks intended for auto trans didn't even get machined with a hole to add a pilot bearing
 

nickb2

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#9
Your pilot bushing should look this this. I am surprised didn't stay in the "seized" engine crankshaft. Normally, the pilot is driven into the crank, not the flywheel. I guess the old one came out with the flywheel. You could simply drive it out through the flywheel to see if it was not just stuck in there and check to see if it fits loosely in the crank shaft. I would be afraid of installing that flywheel and misaligning the pilot. Again, alldata confirms, see snap shots and mentions, "misalignment and looseness in the crankshaft" snap #1 and "position bearing to crankshaft" snap #2.

My guess is that the old bearing is done and needs replacing if it came out with the flywheel and did not stay IN THE crank.


From memory, the nub of the bearing juts out of the crank shaft enough to hold the flywheel center while you torque it down. I could be wrong, I am a diagnostic specialist, this stuff usually goes to the R and I ( remove and install) guys.
Screenshot (210).png

Screenshot (212).png
 
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nickb2

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#10
If the donor engine is the one with the leaking rear crank seal, get to that also. Consider yourself lucky, those pilot bearings are a hassle to remove if you don't have a special tool, all you will need is a socket the diameter of the new bearing to drive it in.

Rear chain for passenger side cam. Alldata confirms.
Screenshot (211).png
 

nickb2

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#11
But seeing this example of amazon picture, I am not so sure if the pilot does go into the flywheel. it looks nothing like the one in the alldata. I just know I did most in gt's with v8's, . So my memory is not serving me well, and I most certainly want to give you the best info I can.


Screenshot (213).png
 
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nickb2

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#13
But I swear, I can only remember driving out the pilots on stangs with a slide hammer from THE CRANK, never worried about having to install them in the flywheel.

I hope someone here can give better info than me. But again, I swear, I never saw one stuck in the flywheel. always in the crank. I can"t ever remember on any model car/truck I have done, have I ever seen a pilot in the flywheel. Even beemers or audi's, volks etc. And those are sure special sometimes.
 

jd

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#14
Had a Mitsubishi Mighty Max pickup with 2.0 engine. Pilot was a little ball bearing (smaller than a 6203 alternator front bearing) and it was pressed into the flywheel. There was a little shoulder in the flywheel bore to keep the pilot from being driven too deep. Input shaft pilot was badly worn and sloppy in the bearing when bearing was in the right place in the bore. Not knowing about Speedy Sleeves for Pilots, I filed the shoulder away and put two pilot bearings in the flywheel. Drove one too far and the second behind it so "bearing" stuck out of both sides of the Flywheel. It worked well since it rode on two undamaged parts of the pilot. "Necessity is Mother of... Some Very Homely Children."
 
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jd

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#15
Just saw from the Amazon link that this 4.0 IS the Cologne SOHC with that ugly chain pack. Please check it carefully. Even better, change the packs pre-emptively.
And it sure looks like the pilot bearing is only the classic "Bronze Bushing." Also, at least from the pic, it presses into the flywheel. Need a little puller ginny to pull it if the flywheel's still mounted. I liked the ones pressed into the crankshaft. Pack with grease, take a drift about the diameter of the pilot, smack with hammer. Hydraulics popped the bushing out.