Best Preventative maintenance for 4.0? - JeepForum.com

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post #1 of 16 Old 11-02-2009, 10:27 AM Thread Starter
JustEatEvryPart
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Best Preventative maintenance for 4.0?

What does everyone think the best preventative maintenance for 4.0 cherokees is? Not just the engine, but the suspension, unibody, etc.

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post #2 of 16 Old 11-02-2009, 10:47 AM
cornbrizzle
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change fluids regularly, keep all joints greased,and check all joints for play and tightness, and check bushings for wear.

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post #3 of 16 Old 11-02-2009, 10:49 AM
CJ7-Tim
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Follow the routine preventative maintenance and service intervals in your owners manual. If you don't have one, stop by the junkyard or look on eBay.

Wash your Cherokee often, paying extra attention to the wheel wells and underbody. Just look at any old rusty Cherokee. Self service car washes are better than the drive through ones. Wax the paint every fall and spring.

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post #4 of 16 Old 11-02-2009, 10:53 AM
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Quote:
Originally Posted by CJ7-Tim View Post
Follow the routine preventative maintenance and service intervals in your owners manual. If you don't have one, stop by the junkyard or look on eBay.

Wash your Cherokee often, paying extra attention to the wheel wells and underbody. Just look at any old rusty Cherokee. Self service car washes are better than the drive through ones. Wax the paint every fall and spring.
Good advice...

The owner's recommendation of maintenance is there for a reason.

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post #5 of 16 Old 11-02-2009, 05:26 PM Thread Starter
JustEatEvryPart
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Great stuff guys. Any advice on preventative maintenance in the trails? As far as breaking parts goes? Any parts that break more often than others?
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post #6 of 16 Old 11-02-2009, 05:40 PM
corndogduff
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Here's my advice... Don't jump it. I had a fairly smooth riding setup till I caught some air, now I have a bent control arm and occasional DW that would make Chuck Norris crap himself.

Luckily though, almost everything important is replacable and interchangable from 1987-2001

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post #7 of 16 Old 11-02-2009, 06:32 PM
Dogberri
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i have heard people say that the starters in the 4.0's go out often but i dont know how accurate that is
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post #8 of 16 Old 11-02-2009, 06:39 PM
xjfever
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I have had to replace my starter once in 125000 miles, I wouldn't call that often. Had a YJ with 165,000 and the origional starter.

  1. '95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
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  3. Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
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post #9 of 16 Old 11-02-2009, 06:58 PM
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Quote:
Originally Posted by Dogberri View Post
i have heard people say that the starters in the 4.0's go out often but i dont know how accurate that is
NOT TRUE......unless you let your battery cables and/or battery deteriorate to the point that the battery draws excessive CURRENT trying to make up for lost VOLTAGE. THAT kills a starter QUICKLY, no matter WHAT brand of vehicle you drive.

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I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
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post #10 of 16 Old 11-02-2009, 07:03 PM
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Coolant system is always great to keep tabs on. You have a 99 though, so you don't have to worry about crackin a head like a 00 or 01 Xj if you overheat. But the thermostat, hoses, cap, etc. Just check on em

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post #11 of 16 Old 11-02-2009, 07:06 PM
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Quote:
Originally Posted by xjfever View Post
I have had to replace my starter once in 125000 miles, I wouldn't call that often. Had a YJ with 165,000 and the origional starter.
Agreed. My XJ has 150k miles worth of New England weather. Original starter has been holding up extraordinarily well. Even on cold freezing mornings it shows no sign of hesitation or drag. Starts up my Jeep with less than 3/4 a second of cranking every time! It literally sounds brand new.

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post #12 of 16 Old 11-02-2009, 07:07 PM
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always check your engine mounts with the 4.0! The bolts shear off in the block and are a pain to get out. Also keep your grounds clean for less draw and battery strain.

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post #13 of 16 Old 11-02-2009, 07:40 PM
tjwalker
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Garage
Regular fluid changes. Fluids are the "lifeblood" of your vehicle.

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Without "data", all you have is an opinion!
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post #14 of 16 Old 11-02-2009, 08:38 PM
Beefcake7777
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make sure you dont have a dirty air filter. just buy a haynes manual for cherokee or something, they have maintenance schedules listed, also make sure to keep everything lubricated
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post #15 of 16 Old 11-03-2009, 02:08 AM
corndogduff
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Dont let your woman drive it.

Duff.
(broken)98 ZJ 5.9
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