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Old 07-13-2011, 07:20 PM   #1
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Been driving with no oil filler cap.. HELP

Hey guys...

I have an 09 Jeep Wrangler Sahara

Hopefully you can give me some advice or at least lead me in the right direction..

Today i went to get an oil change at the dealer. ( Not the same dealer I always go to). Anyway after the oil change they told me that the oil filler cap was missing. ( I hadn't checked my oil in awhile when gassing up) I KNOW I KNOW....

Anyway.. I'm worried now that I have driven a lot probably up to 3 months worth without an oil cap in place. There doesn't appear to be any oil in the engine area... I would have thought it would have been everywhere.

Is there any long term dammage I should be afraid of... or looking out for? anything I can do at this point..!!!

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Old 07-13-2011, 07:33 PM   #2
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I've never driven a Jeep without a cap, but in my 35+ years of driving I have had 2 brain farts and forgotten to replace the cap on other vehicles I owned. In both instances there was no doubt the cap was missing. Oil was evident on the hood and components.

Running without a cap won't hurt your engine (as far as mechanically, if you didn't blow out all the oil). It just usually makes a mess to clean up.

Makes me wonder if the place that changed your oil didn't lose it. Not that they did... just that it's an easy claim to blame the driver when they know nobody checks such things when they bring it in for service.

Bottom line. Your OK. Get another cap and install a new "idiot" light on your dash that says, "Do You Have Your Oil Cap?"

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Old 07-13-2011, 07:43 PM   #3
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hhahah.. thanks..

Yea i argued with the girl working the service counter as I figured they lost the cap and just charged me for it. She tried to tell me that unless I had been going over a lot of bumps that i wouldn't notice oil in the engine compartment. I laughed and said.. it's a jeep.. Of course i go over bumps, I purposely hit them, she didn't find it as amusing.

Anyway i was just worried about contamination of the oil and now dirty oil getting into the engine.

ALso what would have been the tell tale signs that I was at a critical low level in oil... Any indicator lights? Loss in oil pressure?
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Old 07-13-2011, 07:57 PM   #4
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Old 07-13-2011, 08:01 PM   #5
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I'm not sure what indicators on the dash you would see these days, other than the "oil" icon lighting up and your oil pressure gauge indicating you were critically low. Surely, if you were that low, you would here knocking, clicking, and other noises coming from an engine low on lubricant.

The cars I was driving as a younger man (when I did the same as you) were pre-computer and from the mid-60's. I noticed my mistakes fairly quickly, as I was constantly checking under the hood to refill fluids on those old wrecks.
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Old 07-13-2011, 09:09 PM   #6
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...Anyway i was just worried about contamination of the oil and now dirty oil getting into the engine.

ALso what would have been the tell tale signs that I was at a critical low level in oil... Any indicator lights? Loss in oil pressure?
If there was no indication of an oil mess in the engine compartment then no oil was lost from the missing cap. The problem would be from dirt and water interring into the hole on your valve cover. Since you never checked your oil level in the first place you have no idea if it was low or any signs of water contamination. Hint: Do your own maintenance from now on.
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Old 07-14-2011, 06:14 AM   #7
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As you already know, you need to get under the hood more often.
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Old 07-14-2011, 08:55 AM   #8
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If there was no indication of an oil mess in the engine compartment then no oil was lost from the missing cap. The problem would be from dirt and water interring into the hole on your valve cover. Since you never checked your oil level in the first place you have no idea if it was low or any signs of water contamination. Hint: Do your own maintenance from now on.
+1 At this point there is really no way of telling if dirt or water entered the engine. The only thing you can do at this point is worry, and that accomplishes NOTHING. Drive it, keep an eye on the oil level, and as mentioned start doing your own work, or check the work of others. JMO

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