View Poll Results: What's your odometer reading? Problems??
Voters: 1042. You may not vote on this poll
This is a poll for the JK 3.8L V6 and it's engine longevity. Engine problems so far?
12-27-2016, 05:10 PM
#511
JK Enthusiast
08 JKU X S package. Purchased in Oct 07. Lifetime warranty.
Water pump went out about 30k.
88k on the odo but I never recalibrated it for the tires so it is probably 5% higher.
Drive 40 miles round trip 5 days a week. Runs fine. No oil consumption. 6spd with 4.21 gears so it can move a little better now than with the 3.21s. MPG went down a little with the change but the re-gear woke it up a lot.
The engine seems fine for dependability etc... but for the low mpg and low HP it is disappointing.
I like the Pentastar engine. My wife has a 2011 GC V6 and it is a nice engine.
Water pump went out about 30k.
88k on the odo but I never recalibrated it for the tires so it is probably 5% higher.
Drive 40 miles round trip 5 days a week. Runs fine. No oil consumption. 6spd with 4.21 gears so it can move a little better now than with the 3.21s. MPG went down a little with the change but the re-gear woke it up a lot.
The engine seems fine for dependability etc... but for the low mpg and low HP it is disappointing.
I like the Pentastar engine. My wife has a 2011 GC V6 and it is a nice engine.
01-02-2017, 12:10 AM
#513
JK Enthusiast
Join Date: Aug 2008
Location: Niantic CT
Posts: 167
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Checking back in with 187400 now. Burns a bit of oil between changes but nothing terrible. Original clutch, just put a new set of Nitto's on it and had a 4 wheel alignment that was needed big time. Rides awesome now, better than I remember. Get the feeling that I'm going to need to replace the battery again before the winter is over. Had cold spell few weeks ago and she was dead. My fog lights stopped working at the multifunction switch a while back. Intermittent issue with the starter. Sounds like the engine is full of gravel when cranking it. I'll probably need to replace the starter eventually. Engine is still going strong, runs smooth, still on the original set of plugs. The 3.8 is solid. Should be ready to hit 200k by late summer or the fall.
01-02-2017, 08:46 AM
#514
JK Super Freak
Join Date: Apr 2008
Location: Thunder Bay, Ontario
Posts: 1,267
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Turning 260,000klm this week. 5w30 Amsoil with the larger filter. Burns 1/2 Qrt oil in 10,000klm (6,000mi). Switching to Amsoil European 5w40 next oil change this week. Motor itself has had no work other the sparkplugs, wires, and PCV changed. In process of doing O2 sensors.
Transmission has had no work just regular flush and filter change.
Transmission has had no work just regular flush and filter change.
01-02-2017, 11:18 AM
#515
JK Super Freak
Turning 260,000klm this week. 5w30 Amsoil with the larger filter. Burns 1/2 Qrt oil in 10,000klm (6,000mi). Switching to Amsoil European 5w40 next oil change this week. Motor itself has had no work other the sparkplugs, wires, and PCV changed. In process of doing O2 sensors. Transmission has had no work just regular flush and filter change.
01-06-2017, 11:59 AM
#518
JK Newbie
Join Date: Jan 2017
Location: Houston
Posts: 11
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Spun bearings
08 Rubicon bought in March 2015. Drove it until October of that same year and jeep spun bearings. Took it to a local rebuild shop and had them install a long block. Drove that for about 1000 miles and on a trip during the holidays. This darn thing decides to spin another bearing. Towed it back took it to the shop and they said timing cover was not letting the oil pump seat properly and that i needed a new cover. Paid an additional $1500. For cover and fluids. Drover this thing about a year and on the same trip but this time on the way back it decudes to spin another bearing. Had to rent uhaul with transporter and currently at the shop. Waiting to see what they come up with. Love the jeep but very disapointed in the product. Jeep had 72,000 miles when i bought it and currently has about 83,000 don't really drive it much this is my weekend toy.
01-06-2017, 07:55 PM
#519
JK Junkie
08 Rubicon bought in March 2015. Drove it until October of that same year and jeep spun bearings. Took it to a local rebuild shop and had them install a long block. Drove that for about 1000 miles and on a trip during the holidays. This darn thing decides to spin another bearing. Towed it back took it to the shop and they said timing cover was not letting the oil pump seat properly and that i needed a new cover. Paid an additional $1500. For cover and fluids. Drover this thing about a year and on the same trip but this time on the way back it decudes to spin another bearing. Had to rent uhaul with transporter and currently at the shop. Waiting to see what they come up with. Love the jeep but very disapointed in the product. Jeep had 72,000 miles when i bought it and currently has about 83,000 don't really drive it much this is my weekend toy.
01-07-2017, 07:07 AM
#520
JK Newbie
Join Date: Jan 2017
Location: Houston
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That's a good suggestion I will be doing that on the next go around. I'm just not understanding why this would happen on three different blocks and cranks.