Jeep 3.7 & 3.8 motors
01-29-2010, 10:52 AM
#1
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Year: 1996 XJ Sport 2007 KJ Rubicon
Engine: 242 4.0 Ho, 226 3.7 V6
Jeep 3.7 & 3.8 motors
What's the difference between the 3.7 v6 in the jeep liberty and grand cherokee and the 3.8 v6 in the wrangler.
01-29-2010, 11:29 AM
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 w/ K&N and bored TB
The 3.7 is SOHC while the 3.8 is a pushrod, they are just totally different engine designs as well. The 3.7 isnt known for being a great engine, the valvetrain sucks, my friends liberty needed the whole top end rebuilt at 100kmi and that wasn't even uncommon. From what i've heard about the 3.8, its ok, no major issues and it puts out a tiny bit more torque than the 3.7, but its not a replacement for the good old 4.0.
Last edited by Iant333; 01-29-2010 at 11:33 AM.
01-30-2010, 12:23 AM
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Year: 1996 XJ Sport 2007 KJ Rubicon
Engine: 242 4.0 Ho, 226 3.7 V6
Dang, I figured it was a few tweaks not a different motor. Glad I didn't order the supercharger kit for the 3.8 and try to adapt it like I planned. Thanks.
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