92 YJ Motor in 06 TJ/LJ
Posted: December 12th, 2012, 8:03 am
So, as my luck would have it, the 4.0 in my 06 LJ is getting horrendously noisy at only 86k. I always take great care of my vehicles, change the oil often, but I’ve never had a vehicle that didn’t end up having engine problems. Even my old truck with a 5.3L Chevy in it needed new lifters before 75k. I think I just have terrible luck buying vehicles that people don’t change the oil on enough, I dunno….
Based on research I’ve done I think it may be a broken piston skirt. The tick takes about 15-20 seconds to start on a cold start, and then goes away at idle once it warms up. I haven't spent the time to pull the pan or further diagnose it due to just thinking about and looking into engine swaps.
Anyways, my friend has a freshly built 4.3L stroker for a price too good to pass up. The stroker would cost me significantly less than a used 03-06 4.0L from various sources. Yes, I understand 4.3 is an uncommon stroker size, and I'm not sure why he chose 4.3 instead of 4.6 but for $750 I am seriously considering it.
He had it in his 92 YJ and it was the original motor. After pulling it out for a rebuild he decided to mildly stroke it. The work was done by a friend of his with a speed shop. He then ran the motor for about half of a wheeling season until he started having problems with it again. Come to find out the Ford injectors he was using were leaking after he shut the motor off which caused bearing failure from filling the oil up with fuel. It then went back again for a rebuild, new pistons, bearings, etc and before he could get the motor back in he scrapped his project due to frame rot. It also has new rocker arms and lifters with probably less than a thousand miles on them. I watched him replace them myself trying to chase down the bearing noise from the fuel contamination.
So, like I said, with the price he wants for it I’d have just about as much money in the machine work and parts to drop a new set of pistons in my current motor. The owner is a good friend of mine and I trust him and the builder of the engine.
My question, is does anyone know what kind of trouble or differences I’ll run into trying to drop a 92 block into my 06? I'm figuring if I swap everything from my block over to his the computer shouldn't even known anything has changed.
I know the main differences I'll need to tackle are:
1. Coil on plug ignition, I doubt his head has the provisions for mounting the rail.
2. Exhaust Manifold, he says I can use the manifold he's going to give me with the engine and change the head pipe for cheap. I'm not sure if his manifold is 6 into 1, but mine is 6 into 2 for the mini cats.
3. OPDA/Camshaft Synchronizer, I have the infamous 05-06 style with the known issues. Can I slap mine on his and run it?
4. Intake Manifold, will mine bolt up?
If anyone can shed any light I would appreciate it, I'd like to know just what I've getting into if I decide to do this...thanks guys.
Based on research I’ve done I think it may be a broken piston skirt. The tick takes about 15-20 seconds to start on a cold start, and then goes away at idle once it warms up. I haven't spent the time to pull the pan or further diagnose it due to just thinking about and looking into engine swaps.
Anyways, my friend has a freshly built 4.3L stroker for a price too good to pass up. The stroker would cost me significantly less than a used 03-06 4.0L from various sources. Yes, I understand 4.3 is an uncommon stroker size, and I'm not sure why he chose 4.3 instead of 4.6 but for $750 I am seriously considering it.
He had it in his 92 YJ and it was the original motor. After pulling it out for a rebuild he decided to mildly stroke it. The work was done by a friend of his with a speed shop. He then ran the motor for about half of a wheeling season until he started having problems with it again. Come to find out the Ford injectors he was using were leaking after he shut the motor off which caused bearing failure from filling the oil up with fuel. It then went back again for a rebuild, new pistons, bearings, etc and before he could get the motor back in he scrapped his project due to frame rot. It also has new rocker arms and lifters with probably less than a thousand miles on them. I watched him replace them myself trying to chase down the bearing noise from the fuel contamination.
So, like I said, with the price he wants for it I’d have just about as much money in the machine work and parts to drop a new set of pistons in my current motor. The owner is a good friend of mine and I trust him and the builder of the engine.
My question, is does anyone know what kind of trouble or differences I’ll run into trying to drop a 92 block into my 06? I'm figuring if I swap everything from my block over to his the computer shouldn't even known anything has changed.
I know the main differences I'll need to tackle are:
1. Coil on plug ignition, I doubt his head has the provisions for mounting the rail.
2. Exhaust Manifold, he says I can use the manifold he's going to give me with the engine and change the head pipe for cheap. I'm not sure if his manifold is 6 into 1, but mine is 6 into 2 for the mini cats.
3. OPDA/Camshaft Synchronizer, I have the infamous 05-06 style with the known issues. Can I slap mine on his and run it?
4. Intake Manifold, will mine bolt up?
If anyone can shed any light I would appreciate it, I'd like to know just what I've getting into if I decide to do this...thanks guys.
