Engine Overhaul ? - JeepForum.com
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post #1 of 5 Old 08-28-2002, 08:14 AM Thread Starter
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Engine Overhaul ?

My Jeep just turned 109k - & since I have an oil change on the way I was wondering about maybe doing an engine overhaul. Someone mentioned to me that if I were to use some Oil additive, to basicaly clean out all the **** thats been built up I may breathe some life back into my jeep. The whole process would basicaly be An oil change every 1000 {or so} miles, w/ every change adding a new can of the Additive. & of course after a few thousand miles of this change out the sparks & air filter. Anyone ever here of such a thing ? Alternatives ? thanks

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post #2 of 5 Old 08-29-2002, 10:57 PM
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Is there something the engine is doing right now such as lifter tick, rod knock, oil burning, etc? If you at least don't have any ticks or knocks the engine is still in good shape for the most part. No matter which engine you have be it the I6 or 318, you can get well over 200k if you at least keep the oil changed. For preventative maintenance I would flush out the engine with some engine flush. I flushed mine twice in one sittting because I would lose oil pressure after driving about 25min because of sludge and dirt in the engine. Do that and put some Lucas or Restore in your Jeep and you'll be fine. No need for a rebuild at 109k if the engine doesn't make any noise.
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post #3 of 5 Old 08-30-2002, 06:18 AM Thread Starter
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Yea, there isn't any internal oil burning - Only problem is a leaking rear main seal. Thinking about just using some silicone to seal up the leak - rather then drop 300 bucks on it. {since its leaking on the exhaust header, it stinks}

Other than that, I have no ticks or knocks, & my idle is still smooth as well. I was just thinking It may be a good time. -how many miles did you drive on the restore before flushing ?
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post #4 of 5 Old 08-30-2002, 05:33 PM
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I have to agree, if it isn't doing anything bad, just leave it alone. The I-6 4.0 is a very very reliable engine and I'm still waiting to hear on the reliability of the dodge 5.2 that has been around since the 60s, so I would think thats a good reliable engine as well.

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post #5 of 5 Old 08-31-2002, 10:24 AM
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When I bought my Jeep at 118k, I flushed the engine twice because mine was so dirty that I actually lost oil pressure several times when driving a long time. One of the idiot previous owners rarely changed oil which is what caused it. As far as the reliability of the 5.2 goes, lets just say that it has run before with virtually no oil pressure and it was ticking pretty bad and after flushing it out twice the engine seems to be fine. The 5.2 is also almost identical in design to the old 340 and has been used before in cop cars in the late 70's. It is definitely every bit as tough as the I6. After flushing it out, I put some restore in not because it really needed anything like that but because the engine is old and has no doubt lost a little compression over the years from wear. It has worked in other vehicles i've owned and it seemed to work in my Jeep. Just put some in at every oil change.
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