Hello ladies and gents, a sad occasion has fallen.

My old 90 motor has lost another cylinders compression, and has developed an oil leak because of crank case pressure. The good news? I got a jy motor out of a 98, pulled the vc, top end looks brand spankin new. Also got a 99+ intake, exhaust off the 98, Tb, and sensors for said Tb.

Now, the question. The dizzy for the renix motor has a different harness then the late model, so...do I keep the 98 distributor in the motor, but swap the ckp? Or put in the renix dizzy whole? O don't know if the cam driver is the same, or if both ckps read the same...so long story short, which distributor with which parts remain?

 

I'm pretty sure you treat the HO like a long-block, swap all except the head of course. (that's what makes it a "long block"). Keep the Renix torque plate/flywheel, extend the temp. gauge/light sender wire so it reaches it in the (HO?) thermostat housing. The hole in the HO block where your knock sensor goes should be threaded. There is a plug in the block where the coolant temp sensor sensor goes.

Cruisers info it in his sig, linked on-top in mine.

Here it is>>

Cruiser’s HO into Renix Swap
This swap is easier than some will lead you to believe, generally those who have never done it. Those of us who have done it, like myself, will share with you the things that need to be done for a successful swap. Just think of it as swapping in a long block.
The HO and Renix have some differences but none that can’t be overcome very easily.
Any HO engine from an XJ or ZJ through 1998 can be used. One running change was that the rear of the head was no longer drilled and tapped for the temperature gauge sender beginning in the 96 model year. The sender can be relocated to the threaded hole in the thermostat housing taken from the HO engine. You’ll have to extend the wire to that location. Some brave souls even drill and tap the HO head for the sender.
You will be using the intake and exhaust manifolds from your Renix, along with all your sensors and wiring. Since the intake ports of the HO are slightly different, you use the Renix gasket. Exhaust ports are identical.
You will need to use your Renix distributor as it is different than the HO because they use different fuel management systems. The flywheel or flexplate from the Renix must be used so your CPS gets the correct signals. The valve cover from the Renix allows you to keep your CCV system intact and requires no modifications.
The HO block will have a plug in the coolant galley on the driver’s side of the block, closest to the front, which needs to be removed so your Coolant Temp Sensor can be installed in it’s place just as it is on the Renix. It requires a 5/16" square drive or a modified 3/8" drive that has been ground down to fit. Do this before installing the engine.
As for the knock sensor, which is located just above the oil pan on the driver’s side of the engine about mid way, all the blocks I’ve seen are threaded for it. If not, I’ve heard they may be drilled but not tapped. Tap the hole if that’s the case.
　
Revised 07/24/2012

 

Ok cool. The only difference I see is that I'm using the head off the 98 as well, just for the intake really

 

Idk, Here I'm just a "puter jocky" forwarding what I've heard. Pretty sure there might be issues with the 98 intake manifold. Different TB and the MAP there, throttle and kick-down cable on the other side...issues I think! (Idk)

 

Well, map and tps have the same number of wires, so I reckon I can do something there....idk about the intake though

 

Well, Cruiser or someone else who has been there will help. I'd think both the throttle and kick-down cable would need to be changed, as well as the other stuff. (to install a 98 intake). Also there is a change in the power steering pump bracket. Not sure if that involves the intake, it might.

 

It's a 5 speed, so no kickdown, but the ps pump may be different...I can't recall offhand

 

The Renix adjusts with the power steering. I gather the later uses the idler pulley. Do some looken! It's there. Btw there is some bearing or bracket on the AC Compressor side on the later that's a nightmare. Details forgotten. I'm sure Djb remembers!

 

Well, good thing I got all the brackets then! But yea, the bolt your thinking of goes through the timing cover and into the ac bracket. But I'm also installing the ac bypass I found at said jy while I'm at it

 

Alrighty, motor is in and accepting the renix parts...does anyone have a wiring diagram for the map and tps so I can wire them up properly?

 

I think if you look at a TPS check/adjust deal it will tell you what goes where. I'm a little rusty..one is the 5V feed, one grounds (through the TCU), and the third is the one that changes with...change.

The Map has a 5v feed, a ground, and a return that varies with vacuum.

This has some of the best diagrams I've found. http://jeep.zerok.ru/index.php?page=XJ1984-1991 (you gotta click on wiring diagrams, way down on the left)

There are allot here as well> http://oljeep.com/gw/elec/cherokee/edge_cherokee.html

 

Excellent dflint!