preventative Maintenance

EZLiberty · **Joined:** Sat Aug 08, 2009 9:46 pm **Posts:** 84

I have 105k miles on My liberty, I recently replaced all O2 sensors and vacuum hoses (after much search the leaky one) to get rid of the engine light and everything else seems to be working well. Do this engines use a timing belt? how hard is it to replace one for a DIY, tips? Also I noticed a little stumble some times at a red light and I thought it must need new spark plugs, am I correct?

Thank You.

sota · **Joined:** Fri Aug 07, 2009 7:44 pm **Posts:** 379

when was the last time you changed the plugs? with that many miles i'd investigate if the coils are all working properly. the 3.7L v6 uses chains so no replacement needed. the 2.4L I4 uses a belt though, and you didn't specify what engine you have.

EZLiberty · **Joined:** Sat Aug 08, 2009 9:46 pm **Posts:** 84

sota wrote:

when was the last time you changed the plugs? with that many miles i'd investigate if the coils are all working properly. the 3.7L v6 uses chains so no replacement needed. the 2.4L I4 uses a belt though, and you didn't specify what engine you have.

Great, so no need to replace that one then, right? Sorry, yes it is a 3.7l. Anything else I should do besides the obvious maintenance items.

Thank You.

mikey1273 · **Posted:** Thu Mar 24, 2011 3:18 pm

From my past experience with gas engines I would change the oil, all the filters, spark plugs, plug wire set, then use SeaFoam. if that don't help then move on from there.

Pote · **Posted:** Thu Mar 24, 2011 3:43 pm

At around 90K or 100K I swapped all my oils out for synthetic. Front and rear diffs, new seals, the transmission, t-case, the oil, you name it. Also did a plug changover/tuneup.

EZLiberty · **Joined:** Sat Aug 08, 2009 9:46 pm **Posts:** 84

Great, I already changed all the oils and fluids, I'll do the spark plugs and test the coils.
I was going to buy a CRD and still wish I could but decided to keep this one since it really is a great vehicle.

Thank You all.

tommudd · **Posted:** Fri Mar 25, 2011 8:44 am

mikey1273 wrote:

From my past experience with gas engines I would change the oil, all the filters, spark plugs, plug wire set, then use SeaFoam. if that don't help then move on from there.

May have a hard time finding the plug wires :ROTFL:

Plus if using Seafoam or anything like that do it before you change out the spark plugs

mikey1273 · **Posted:** Sun Mar 27, 2011 12:50 am

tommudd wrote:

mikey1273 wrote:

From my past experience with gas engines I would change the oil, all the filters, spark plugs, plug wire set, then use SeaFoam. if that don't help then move on from there.

May have a hard time finding the plug wires :ROTFL:

Plus if using Seafoam or anything like that do it before you change out the spark plugs

Oh yeah I keep forgeting some gas engines don't have spark plug wires that you can replace these days. goes to show you I have never been under the hood of a gas liberty for long. My last gas car a 2003 subaru still used them but no traditional distubritor. I'd have an even harder time finding a spark plug in my Jeep.

And I did post that in the worng order sea foam before plugs so that the new ones don't get fouled up by any junk you might burn out with the seafoam would be better.

Maybe I should not try to help with gas engines any more. Seems like the longer I have a diesel and the more I learn about them the more I forget about gas.

preventative Maintenance

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