4.2 to 4.6 SWAP?????
- Thread starter dinobody
- Start date
Eaglefreek
Eagleless
What 4.6 are you talking about? A stroked 4.0L?
1stDeuce
Explorer
I think the OP meant 4.0L, not 4.6. The 4.0L will bolt in where a 4.2 was, using the 4.2 motor mounts so long as it's a '99 or older XJ/TJ/YJ motor. The '99-up WJ 4.0's and the '00-up XJ/TJ motors have a different bolt pattern on the motor mounts IIRC, and won't work out so well. They all bolt up to the trans just fine. Of course, you're going to have to get the fuel injection to work, as there were no carburated 4.0's, and the 4.2 intake will not bolt up.
We're running a '98 4.0L with TJ wiring and ecm and computer in my brother's '84 Scrambler and it is great!
Have fun!
We're running a '98 4.0L with TJ wiring and ecm and computer in my brother's '84 Scrambler and it is great!
Have fun!
Hesco has a 4.6L I-6 buildup they do starting with a 4.2L block. From there the similarity ends.
I built the poor man's stroker 4.4L engine. i've been running it since 1997 on my '82 CJ-8 rock crawler. It was built for torque and will pull like crazy at 500 rpm with peak torque at about 1400 rpm. Just had it smogged today and it passed California's strict emissions line with room to spare.
It was hot stuff in the last generation of I-6's, but.... what have you done for me lately?
4.4L I-6 using a 4.2L block and crank, with .060” overbore pistons and rings,
4.0L, High Output head with 1996 Mopar MPI fuel injection kit, Hesco adjustable fuel regulator
with fuel pressure gage. H-264-14 cam (.470” lift) and Cloyes double roller timing gears and chains
advanced 4 degrees, High Volume oil pump,
stock ‘95 XJ exhaust header, 2.5” aluminized tubing, cat and 12” glasspack.
hand throttle is for the Premier power welder. MORE engine mounts and PS box forward bracket.
2-5/8” AutoMeter gauges (0-4K tach, oil, temp, Volt, Vacuum)
regards, as always, jefe
I built the poor man's stroker 4.4L engine. i've been running it since 1997 on my '82 CJ-8 rock crawler. It was built for torque and will pull like crazy at 500 rpm with peak torque at about 1400 rpm. Just had it smogged today and it passed California's strict emissions line with room to spare.
It was hot stuff in the last generation of I-6's, but.... what have you done for me lately?
4.4L I-6 using a 4.2L block and crank, with .060” overbore pistons and rings,
4.0L, High Output head with 1996 Mopar MPI fuel injection kit, Hesco adjustable fuel regulator
with fuel pressure gage. H-264-14 cam (.470” lift) and Cloyes double roller timing gears and chains
advanced 4 degrees, High Volume oil pump,
stock ‘95 XJ exhaust header, 2.5” aluminized tubing, cat and 12” glasspack.
hand throttle is for the Premier power welder. MORE engine mounts and PS box forward bracket.
2-5/8” AutoMeter gauges (0-4K tach, oil, temp, Volt, Vacuum)
regards, as always, jefe
Eaglefreek
Eagleless
4.6L strokers are made using a 4.0L block and pistons with a 4.2L crank and rods. If you are using a 4.2l block and crank and just an overbore, it's not a stroker. I have a bone stock 31 year old 4.2L shortblock with a 4.0L head and a Comp cams camshaft and it was a great improvement over the stock combo.