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Old 11-30-2012, 09:18 AM   #1
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Changed oil and now oil leak

Hi, I have a 2002 TJ 4.0 with only 52,000 miles on it. I am the original owner and recently changed the oil in it for the first time in 11 months. I drive a company car everyday, so I only put 2,000 miles on it in the past 11 months. Now one week after the oil change, I noticed a very small puddle of oil in the driveway just behind the right front tire. Back in 2009, with only 40,000 miles on the Jeep, I had a bigger oil leak and had to change the RMS. I just crawled underneath the Jeep and noticed seapage around the RMS and oil pan area, but it wasn't much at all. There is nothing around the oil filter as I first thought the dealer didn't tighten the filter good enough. After just replacing the RMS just 3 years and 12,000 miles ago, I don't think it's the RMS. Why after a recent oil change, would I have a small oil leak?...I can't see it being a coincidence because it wasn't leaking before the oil change just a week ago...Any help/advice much appreciated.

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Old 11-30-2012, 09:34 AM   #2
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Check the back if your block, mine (4.0i6) was leaking from the valve cover gasket and I thought I had a rms or oil pan leak. Just a suggestion.

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Old 11-30-2012, 09:36 AM   #3
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something I noticed when I change my oil, when I remove the filter some oil spills when I unscrew and remove the filter... little gets on the side of the engine and I didn't really pay attention but after the change I thought I had a leak and it was just the old oil on the side rolling down to the bottom. Just took a rag and wiped it down...

or... what kind of oil did you use???
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Old 11-30-2012, 09:37 AM   #4
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Did you just change to synthetic oil?
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Old 11-30-2012, 09:47 AM   #5
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Quote:
Originally Posted by ninjaturtle0
something I noticed when I change my oil, when I remove the filter some oil spills when I unscrew and remove the filter... little gets on the side of the engine and I didn't really pay attention but after the change I thought I had a leak and it was just the old oil on the side rolling down to the bottom. Just took a rag and wiped it down...

or... what kind of oil did you use???
X2. When you change your filter sometimes oil runs down the side of the block and gets trapped. Look around and wipe everything down good.
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Old 11-30-2012, 10:11 AM   #6
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Thanks a lot for the input. I've wiped everything down and hopefully its just excess oil that ran down the side after removing the filter. It's for sure something that happen as a result of the oil change itself because before the oil change (exactly one week from today), it was not leaking oil at all. I also checked the oil level and it appears that there is too much oil in it. I've read conflicting stories on different websites to where too much oil causes seals/gaskets to fail.

I've called the dealership, who btw used a Mopar filter and conventional 10w-30 oil (NOT SYNTHETIC). Of course they said they will have to put it on the rack and take a look as they couldn't diagnose it over the phone. They also said there are other customers ahead of me. Sooo my plans are to wait a week (I'm off Friday's) and if I have anymore fresh oil in my driveway, I will be at the dealership bright and early next Friday so I'm the first customer there...I sure hope it's nothing they did, because it wasn't leaking before they touched it..Hopefully it's just excess that ran down the side after removing the filter...Thanks to all again for the input.
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Old 11-30-2012, 10:56 AM   #7
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Something simple to check....Check the tightness on all your valve cover bolts, especially next to the firewall.
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Old 11-30-2012, 12:08 PM   #8
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Make sure they didn't crack your oil sending unit accidentally of course!
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Old 11-30-2012, 12:47 PM   #9
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Quote:
Originally Posted by ninjaturtle0 View Post
something I noticed when I change my oil, when I remove the filter some oil spills when I unscrew and remove the filter... little gets on the side of the engine and I didn't really pay attention but after the change I thought I had a leak and it was just the old oil on the side rolling down to the bottom. Just took a rag and wiped it down...

or... what kind of oil did you use???
x3 a good indicaticator... is the spilled oil honey looking, or grimey and dark. If its actually leaking the spills going to be cleaner (usually). If its runnoff it will be used oil and dirtier.
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Old 11-30-2012, 01:27 PM   #10
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That particular location of the drip is almost a sure sign it is from the process of changing the oil filter. For me, it's nearly impossible to change the oil without some of the oil dripping out onto what's below. So if care isn't taken to wipe things down afterward and to make sure the filter is tightened properly, you've then got a slow drip from those items for the next few days.

The usual cause of this is an inattentive oil-change guy who either didn't wipe things off after he was done, or perhaps he just simply forgot to properly tighten the oil filter. Ten minutes under your Jeep tomorrow with a rag & an oil filter wrench to make sure the filter is snug should be all you need to eliminate the drip. Caution not to overtighten the filter. Tighten it to good firm hand-tightness, then another 1/2 to 3/4 turn with a filter wrench... no more than that.

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