4.0 Engine Options

[Number4]

I'm looking to buy a salvaged explorer to get it's engine. I have a 1994 4x4 manual. I have a basic question.

What 4.0 blocks from what years will work?

I understand, that In 99 the OHC engine came into play. So ideally I'll want to stay in the 91-98 year range.

I plan to swap all of my sensors and attachments over as needed. Just want to make sure they're wont be any block issues.

Read a few bits of this thread and it seems like I should be fine.

http://www.explorerforum.com/forums/showthread.php?t=195427

I've looked into some Rangers as well, but most I see don't have the 4.0 in them.

 

[vq5speed]

If you look here under all the years it shows the OHV engine was still available up to 2000.

http://www.explorerforum.com/ntrprize/

 

[natenkiki2004]

If you need an engine for a 1994, I'd stick with 1991-1994, MAYBE 1995. Reason being, OBD-II came into play in 1996 and you'd probably have to do a fair amount of swapping bolt-on parts. Ideally, you'd find a 1994 so it's definitely got the 93TM heads but not newer stuff that the 2nd gen's had.

 

[MrShorty]

What I remember from replacing my 4.0:

'91 to '94 are the exact same long block -- Explorer, Ranger, Aerostar -- all the same. To be absolutely sure there are no issues, stick with '91 to '94.

I think '95+ OHV's can be made to work, but they are not exactly the same. Internally, I believe they changed the piston/cylinder geometry a little bit and there may be some external differences as well.

 

[jd4242]

Any year ohv block will work as far as mounting and if your swapping ALL ELECTRONICS..the earlier 90-94 blocks are thicker but thats it..after 97 they have all the updates that were added over the years..personally id look for a 98+ block..thats IF your swapping ALL electronics

 

[Turdle]

I think there are some differences in the flywheel--no?

Lower intake is also shorter 95-up, and, motor mount plates changed in 95 I think

 

[jd4242]

I think there are some differences in the flywheel--no?

Lower intake is also shorter 95-up, and, motor mount plates changed in 95 I think

Yes clutch went to 1/8" bigger but either can be used on either flywheel..flywheel and crank went to 8 bolt and front crank key went to a larger size.timing set has to be for that year crank but crank pulley is same..as stated before the pistons and heads are different from 95 and up.

I didnt know about lim being shorter, know they went to a plastic one intake..

Mounts did change and block got I ""believe"" an extra bolt hole but think either will mount up.they both attach to frame in same manner tho..

 

[Number4]

I'd be keeping only the heads and block. Unless something else made sense.

Are you saying the motor mounts will or won't line up. I don't want to do any welding.

 

[vq5speed]

They added a mounting boss but the boss needed to mount in the 91-94 are still there. I put a 95 short block into my 91.

 

[FR-425]

5.0L !

Might as well go nuts!

If I live long enough to see my 4.0 fail, I'm gonna go 5.0 Liter.... . .

Just a thought.

 

[Number4]

5.0L !

Might as well go nuts!

If I live long enough to see my 4.0 fail, I'm gonna go 5.0 Liter.... . .

Just a thought.

There is one in town for $250 with 130k on it. But it's not just a drop in swap. Pretty sure new motor mount mounts have to be welded. Among other things.

 

[jd4242]

There is one in town for $250 with 130k on it. But it's not just a drop in swap. Pretty sure new motor mount mounts have to be welded. Among other things.

Its definitely not a drop in swap...