Another 4.0 to 4.0 swap

[grh777]

I have a 92 ford ranger. I found an engine in a 94 ford explorer. It looks a little different than mine. One exhaust manifold has a pipe that mine doesn't. Will this engine fit my 92? What will I have to change to make it work? Both are vin "X". I'm sure this has been asked before but I can't find it. Thanks in advance.

 

[runtime]

I just swapped a 92 Explorer into a 94 Ranger. I think the pipe in the exhaust manifold is for an EGR on 94 CA emissions. Just use your 92 Manafold or plug it.. Not sure what else the EGR connects into since mine was non EGR. Another diffrence will be the injectors. 92 has black top and 94 uses a red top. Not sure the real diffences but just swap the ones from the 92 and use it's engine harness & computer for the Ranger.

From there on it is a direct swap.

 

[AllanD]

I agree just swap your injectors, (ON-ENGINE) wiring harness, upper intake, drivers side exhaust manifold and oil pump drive (removing and replacing the un-needed cam position sensor) from your engine onto the "new" one and you are good to go.

BTW, use the 1994 alternator bracket and tensioner setup, as it IS a superior setup.

And even though the tensioner mounted below the altternator looks harder to access it is actually much easier to release when it's time to install (or replace) the drive belt than the earlier "top mounted" tensioner is.



AD

 

[grh777]

Thanks. Both of you said to replace fuel injectors. Can I do this without removing the intake manifold? And, if I keep the explorer alternator bracket and tensioner, will I need to buy a new belt? And AD, do you mean my (ON-ENGINE) wiring harness?

 

[runtime]

To replace injectors you have to remove only the upper intake/plenum and fuel rail. Sounds like you are going to have to swap upper intake from the 92 anyhow since you don't need the EGR stuff from the 94. No need to remove lower intake.

I'm sure AllanD means just the wire harness that attaches to injectors & sensors from the 92 engine itself. (vs any upstream harnessing which you shouldn't use either).

ON EDIT: Be sure to get new gaskets for the upper intake & fuel rail. I got mine at O'Reillys and they had the two listed in a kit for the "Plenum". Also get a stud socket to remove the studs that hold the plenum and hold down the fuel rail. I believe it is a E6 torx socket. Also replace all the O-Rings on the Injectors. Couldn't tell you if belts are diffrent but, always good to replace the belt.

 

[AllanD]

Thanks. Both of you said to replace fuel injectors. Can I do this without removing the intake manifold? And, if I keep the explorer alternator bracket and tensioner, will I need to buy a new belt? And AD, do you mean my (ON-ENGINE) wiring harness?

use all your original wiring because the 1994 wiring is different and non-compatible with the rest of your trucks current wiring.

not sure on the belt but I believe it is the same.

The problem with the earlier tensioner is thaat you need a special wrench to get on it AND that the pulley is mounted with a left hand thread screw, the pulley eventually needs to be replaced and when you do the brittle aluminum body of the tensioner arm tends to shed the threads inside the hole....

Have you ever priced a 10mmX1.5 LEFT HAND THREAD heli-coil kit?

Trust me you don't want to...

The later style tensioner uses no oddball bolts and to release the tensioner all you need is a long handled 3/8" ratchet handle (there is a 3/8" square drive hole in the tensioner arm)

The belt is a bunch easier to service with the later tensioner and alternator bracket.

AD

 

[grh777]

Thank you both for the information. I think I can have it installed next week. I took one valve cover off the 94 and it was immaculate compared to mine. I've always been skeptical about buying a used engine but I think this one will get me going again. Thanks again.

 

[grh777]

Autozone shows the same part number, 800-1060N, for a 92 and 94 fuel injector. Does the red and black make a difference?

 

[runtime]

Motorcraft lists PN: 90TF-AA black top injector from a 92 & 92TF-AA red top injector for the 94.
And According to AllanD from one of my previous posts

While they are a different flow rate the later injectors are internally/electrically different.

The "late" injectors are not "spindle" injectors but "Disc Pintle" injectors so they can open and close faster

You'll notice on examination that they don't generate a "hollow cone" spray pattern
like the earlier injectors, the late injectors use a four cone spray pattern...

For the lurkers, bigger is not necessarily better.

There is only ONE correct amount of fuel.

AD

So using the later injectors with the 92r computer you would probably get over fueled or run Rich.

 

[grh777]

I've replaced the fuel rail and injectors and the exhaust manifold. Will the oil pump drive shaft fall out if I remove the cam position sensor? I'm getting close to putting the engine back in. I dread those upper transmission bolts.

 

[runtime]

Sorry don't have experience with CPS as mine didn't have one.

The top transmission were difficult and had to use end wrenches, was much easier with upper intake off. But for me, the bolts on the sides were the real PIA!!!. Assortment of long/short ratchet extensions lengths and wobbles. Then managed to break my 1/2" breaker bar (course 3' pipe cheater) removing exhaust bolts.

 

[sholzy]

Then managed to break my 1/2" breaker bar (course 3' pipe cheater) removing exhaust bolts.

A little OT... I managed to break my craftsman 1/2" breaker bar trying to break loose an axle nut on an old VW Bug. I had a 10' cheater on it and 2 guys bouncing up and down on the pipe. Took it back to Sears. After I told him how I broke it and added it must have been defective, he just laughed and handed me a new one.

 

[grh777]

Oh no !!!. After changing the fuel rail, injectors and exhaust manifold, I decided since the engine is on a stand I would go ahead and replace the oil pump to avoid taking the engine out again later. Well, when I bought the engine (used) the guy said it ran before he took it out to install a 302. The engine sat for a few weeks and I just now decided to drain the oil. Well, when I loosened the drain plug, about 3 tablespoon of water came out first. So my question is did I buy a pig in a poke (lemon) or is a little water normal after sitting a while?

 

[grh777]

NEVER MIND, I'm crazy. I pressure washed it several days ago and just remembered the valve cover was loose.