LM4 5.3L and 4L60E swap into 2004 LJ
- Thread starter LBarr2002
- Start date
The s10 ls conversion headers came in today. The collector touches the starter but it looks like I can make this work 
I'll just need to flatten one side of the collector. Hope to make some progress this weekend.
View attachment 18886
I'll just need to flatten one side of the collector. Hope to make some progress this weekend.View attachment 18886
I got a few good hours in today. Started with exhaust. The collector on the passenger side hit the boss for the starter bolt. I wonder if this boss is bigger on the aluminum blocks than the iron? Anyway, I was able to round off that boss and have sufficient clearance.
Then I made it look like a Jeep again.
And put plug wires all on.
Then I messed with the transmission shifter. I was able to get full range with the jeep shifter, just need to get a metal bushing for the jeep cable end to be able to tighten the linkage and not bind the cable. Down the road I'll have to make a new comb plate if I want to keep the function of the shifter button, lock in park, etc.
And I replaced the jeep regulator with the novak bypass.
I also got the gm harness routed and everything plugged back in. So next on the list is fuel lines and radiator hoses.
Then I made it look like a Jeep again.
And put plug wires all on.
Then I messed with the transmission shifter. I was able to get full range with the jeep shifter, just need to get a metal bushing for the jeep cable end to be able to tighten the linkage and not bind the cable. Down the road I'll have to make a new comb plate if I want to keep the function of the shifter button, lock in park, etc.
And I replaced the jeep regulator with the novak bypass.
I also got the gm harness routed and everything plugged back in. So next on the list is fuel lines and radiator hoses.
I had hoped to keep the transmission cooler hard lines up to the front of the motor then a short piece of rubber hose, but the cooler ports are on the wrong side of this radiator. After looking at is last weekend, we decided it would be better to run flexible lines and cross over the trans tunnel to the drivers side and come up that way. This will avoid any interference with exhaust routing also.
I ordered the Russell 640520 adapters that are 1/4" NPSM to -6AN. I'll order 1/4" NPT to -6 fittings for the radiator once I see if I need straight or 90°.
Power steering hose... I have to have the tj pressure line end to tuck tight on the box and under the grill, but it's way too long and the bends are wrong on the pump end (threads are correct). Anybody know where to get a custom hose with a factory jeep box end?
I ordered the Russell 640520 adapters that are 1/4" NPSM to -6AN. I'll order 1/4" NPT to -6 fittings for the radiator once I see if I need straight or 90°.
Power steering hose... I have to have the tj pressure line end to tuck tight on the box and under the grill, but it's way too long and the bends are wrong on the pump end (threads are correct). Anybody know where to get a custom hose with a factory jeep box end?
Yesterday we had to go to Clemson for my niece's first birthday, but before we went I checked everywhere in town about doing custom power steering hoses, and struck out. I started looking at fittings to make hoses myself, knowing that if I had a hose made and something went wrong in Harlan or Moab I'd be done.
This morning @Twilliamson stopped by to deliver a sweet bushing he made on the lathe, and agreed on making a hose. Then I started fiddling with the factory line again and figured out how to route it. It ain't pretty, but it'll work and it's on the shelf at parts stores.
Tripp made a brass bushing for my transmission linkage, so I finished that up and adjusted it. The shifter works well and the comb plate wont even need to be modified.
I also pulled the throttle pedal out and got my plan together for that, but didnt have time to break out the welder. Jeep pedal on right, yukon xl on left. With a little modification, the gm pedal bolts to the firewall with one of the factory studs, but it's too high and too close to the tunnel.
This morning @Twilliamson stopped by to deliver a sweet bushing he made on the lathe, and agreed on making a hose. Then I started fiddling with the factory line again and figured out how to route it. It ain't pretty, but it'll work and it's on the shelf at parts stores.
Tripp made a brass bushing for my transmission linkage, so I finished that up and adjusted it. The shifter works well and the comb plate wont even need to be modified.
I also pulled the throttle pedal out and got my plan together for that, but didnt have time to break out the welder. Jeep pedal on right, yukon xl on left. With a little modification, the gm pedal bolts to the firewall with one of the factory studs, but it's too high and too close to the tunnel.
Yesterday I coordinated with Tom to pick up the driveshaft from him in Chapin today. Since we were heading over that way anyway, we went to the plex and met up with Brooks and family, ate lunch then got the driveshaft.
Since our local Napa is only open 7:30-5:30 during the week, and 7:30-noon on Saturday, and I only had Napa part numbers for the hoses that "should" work, and autozone couldn't cross reference those numbers, I was at Napa at 7:30 before heading to Chapin. They didn't have the hose I was looking for in stock, but I went in the back with my wire templates and browsed. I found two that looked like they would work.
Lower hose is Napa 708.
Upper is Napa 9049.
With surgery, they fit pretty well.
The lower hose I took it slow, cutting a little at a time, and it came out as well as I could expect. The upper, I chopped the end off and got lucky because I almost cut it top short.
Question... the upper water neck is 1 5/16 or 1 3/8. The radiator fitting is 1 1/4. The hose fits the water neck, but its loose on the radiator. Is there a reducer or something to tighten it up? I saw some hoses that changed sizes over their length, or had a bell end, but finding something like that that fits right is unlikely.
Since our local Napa is only open 7:30-5:30 during the week, and 7:30-noon on Saturday, and I only had Napa part numbers for the hoses that "should" work, and autozone couldn't cross reference those numbers, I was at Napa at 7:30 before heading to Chapin. They didn't have the hose I was looking for in stock, but I went in the back with my wire templates and browsed. I found two that looked like they would work.
Lower hose is Napa 708.
Upper is Napa 9049.
With surgery, they fit pretty well.
The lower hose I took it slow, cutting a little at a time, and it came out as well as I could expect. The upper, I chopped the end off and got lucky because I almost cut it top short.
Question... the upper water neck is 1 5/16 or 1 3/8. The radiator fitting is 1 1/4. The hose fits the water neck, but its loose on the radiator. Is there a reducer or something to tighten it up? I saw some hoses that changed sizes over their length, or had a bell end, but finding something like that that fits right is unlikely.
This morning started with yard work. What was supposed to be ~1 hour turned into cutting trees and working until lunch time. Went to my parents for lunch, hung out, kids played, so didnt get but a couple hours of jeep work in. But, still made progress.
I mounted the throttle pedal. It doesn't look like it in the picture, but it's where I want it left to right. It could be lower and farther back, but if I cut more out of it it will get too close to the brake pedal. I'm going to leave it like this for now and see how it works, but may move it down the road.
The two round stud heads are where the jeep pedal mounted. I'm using the lower one and the bolt up by where the throttle cable came through is the top mount.
The Buick had aluminum heater hoses with quick connect hoses to the heater core. The 3/4 one points straight at the jeep heater core, so I pulled the plastic quick connect piece off and slid the hose over like a hose barb. The 5/8 one turned 90 degrees, so I couldn't use it, so replaced it from the water pump.
I mounted the throttle pedal. It doesn't look like it in the picture, but it's where I want it left to right. It could be lower and farther back, but if I cut more out of it it will get too close to the brake pedal. I'm going to leave it like this for now and see how it works, but may move it down the road.
The two round stud heads are where the jeep pedal mounted. I'm using the lower one and the bolt up by where the throttle cable came through is the top mount.
The Buick had aluminum heater hoses with quick connect hoses to the heater core. The 3/4 one points straight at the jeep heater core, so I pulled the plastic quick connect piece off and slid the hose over like a hose barb. The 5/8 one turned 90 degrees, so I couldn't use it, so replaced it from the water pump.
I invited Tripp over this morning for breakfast, then we got a couple hours of work in. Started by mounting the fender so we could figure out where the ecu will fit, and made and ran the transmission cooler lines. I have to make up some kind of bracket to mount the ps reservoir, but I know where it needs to go.
