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Common parts to go bad

11K views 14 replies 11 participants last post by  C.L. 
#1 ·
So i have recently replaced a few parts on my first wrangler (TJ wrangler X 2002, 4.0l 5 speed nv3550) my TPS (throttle position sensor), O2 sensor, and now need to replace the CPS (crank shaft position sensor) i was wondering what most people need to replace around 150k miles. i have access to alot of parts at a pretty cheap rate. so i was hoping to get a jump on parts that commonly go bad.
 
#2 ·
I have 350,000 and have replaced:
O-2 sensor twice,
Water temp sensor once,
Thermostat twice
Belt tensioner and idler pulley twice each,
AC compressor twice,
Power steering pump once,
Water pump twice
Engine once @ 320,000

The secret to long reliable service is to buy the best parts, not the best deal. IE my first O-2 sensor.
 
#5 ·
Do you mean tye rod ends, just grease them should last a long time, ball joints are a different story, only 2 of the 4 have grease fittings, mine are still original, but have some play in them.
Rear u joints if not replaced already are probably due, buy Spicer with grease fittings, front axle u joints and front wheel bearings on mine went to 275,000, I am not sure you can wear out the front drive shaft U joints.

I am going to jinx myself, but I am still running my original alternator
 
#6 ·
Honestly, I would wait until parts start to show symptoms of wear or failure before you replace them. No need to fix what ain't broken. The only thing I would replace at 150k is the clutch if you have a manual.
 
#10 ·
You should just do a thorough inspection of all the steering, suspension and drivetrain components before dumping a bunch of money into something that may not need fixing.

Like it's been said above don't get the cheap parts buy OEM. Cheap parts are only cheap until they have to be replaced more than once.

Buying from the dealership isn't your best bet either, plenty advice on what brand parts to use for everything on your Jeep in this forum, just gotta search for it.
 
#11 ·
Basically anything that spins, is subject to high heat or has a load on it will wear out. U-joints, wheel bearings, alternators, thermostat, water pump, shocks, clutch, etc will all wear out in time. From my experience, I have replaced water pumps, cylinder heads, radiators, thermostats, alternators, and shocks.
 
#12 ·
Thanks for all the great advice guys. I know that i should only replace a part if its going bad, but i like to have parts on hand if i know they are likely to kick the bucket soon. i also like to know if ill have to possibly change a part in the near future so i can hit the local scrap yard and do a "test run". (i do the work as if i was going to replace the part to make sure i know how to do it right. don't worry the yards cool with it as long as i don't make a mess)
 
#15 ·
I know that i should only replace a part if its going bad, but i like to have parts on hand if i know they are likely to kick the bucket soon.
U-Joints and unit bearings are worth stocking. They are not a matter of "if" but "when". Electronics/Sensors might last 10k miles or forever, so I usually wait for failure on them. If you've got 150k on the original front driveshaft, grab it just infront of the double cardan joint and try to push it up/down. There should be zero play across the joint housing. The centering ball/socket between the two joints likes to dry out and start wearing. First sign is play in the joint, second sign is an annoying chirping coming out of the joint at 10-30mph.
 
#13 ·
i would not buy (wear parts ) and put them in your personal stockpile,thats what autoparts stores are for.I had a 69 chevelle for many years and did the same thing you are thinking of doing I collected about 1500 dollars in parts and never used them wound up giving them to the new owner when I sold the car in my opinion it was a waste of money, buy what you need when needed
 
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