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Old 05-23-2012, 10:15 AM   #1
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At wits end heeellllp...

We have an 05 TJ 4.0 5spd. I have had the confounded issue with the check gauges light. ( sorry to bring it up again, but I cannot find anyone on here with the exact same symptoms, please read on)

So, I have tried 2 different sending sensors ( 1 from Advance and then 1 from dealership) still no help. Leads me to believe there is a serious problem. When accelerating I have no loss of power, but there is a distinct "growl" that seems to come from the top area o the engine. The growl is not there until I wind out a gear and RPMs reach about 2700-3000. I changed the oil about 2 weeks ago and this weekend the "growl" was getting more frequent at lower RPMs. I got home and checked the oil and it was 3 QTs low. I filled the oil with a heavier weight and Lucas additive. The growl quietened a bit and the check gauges light stayed off a bit longer. However the light do return as well as the growl (however quieter) I feel I may have only bandaged a more serious problem.
1. Where did my oil go? It has not been left on the ground
2. Could the oil pump be out?

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Old 05-23-2012, 11:04 AM   #2
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Is the engine producing dark smoke out the exhaust?

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Old 05-23-2012, 11:09 AM   #3
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Is the engine producing dark smoke out the exhaust?
No smoke.
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Old 05-23-2012, 11:15 AM   #4
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How an engine can consume 3 quarts of oil in two weeks without the engine smoking or leaking is beyond me.
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Old 05-23-2012, 12:12 PM   #5
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possibly the difference in measuring when hot and cold? shouldn't be a 3 quart difference though

edit:
Just thought, 3 qt is a bloody lot! are you sure?
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Old 05-23-2012, 12:44 PM   #6
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Quote:
Originally Posted by carlosprite
possibly the difference in measuring when hot and cold? shouldn't be a 3 quart difference though

edit:
Just thought, 3 qt is a bloody lot! are you sure?
Unfortunately I'm sure. My Dad always taught me to check it cold and on level ground. 3 QTs IS a lot, but that's what it took to get it back in the safe zone.I am really baffled.

Even more strange is shes not a DD so were talking maybe 100-150 miles a week.

I just can't help but think the "growl" and the oil situation are closely related. I had thought they may be different issues, but this past weekend when the growl got louder and more frequent I checked the oil to find it low.
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Old 05-23-2012, 12:45 PM   #7
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I had a truck doing that, broken piston skirt, a quart a DAY. No smoke, no leaks. The catalytic converter was catching it all. It plugged, and I had to rebuild the engine.
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Old 05-23-2012, 12:53 PM   #8
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You don't need to be driving it if it's making a growl because that growl may turn into a knock and when you keep driving it and it keeps getting worse that knock turns into a blown motor. How is your oil pressure? You need to have the inside of the motor looked at. Check rods, piston skirts, bearings, oil pump, etc all those internals should be looked over.
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Old 05-23-2012, 01:44 PM   #9
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I had a situation VERY similar to this years ago. Growl was from the radiator cap, because my headgasket was out near an oil jacket and waterjacket to the cylinder. The pressure from the compression was pushing oil into the water system and over pressurizing the water system.

I wasn't burning and I was leaking... but the water system was a complete nightmare when I found it.

Have you pulled the rad cap when it is running (do it cold.. no burns) and your looking for 2 things. ONE is air bubbling in the rad, signs of compressing leaking into the water system. 2 milk on the rad cap, this is oil getting into your water system.

Rev it while doing so, that growl could only be when the compression from the cyl is overwhelming.

Let me know.
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Old 05-23-2012, 03:16 PM   #10
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I wasn't burning and I was leaking... but the water system was a complete nightmare when I found it.
I wasn't burning and I WASN'T leaking.. just re-read and had to clear that up.
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Old 05-23-2012, 04:14 PM   #11
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Quote:
Originally Posted by Shadowkraze
I had a situation VERY similar to this years ago. Growl was from the radiator cap, because my headgasket was out near an oil jacket and waterjacket to the cylinder. The pressure from the compression was pushing oil into the water system and over pressurizing the water system.

I wasn't burning and I was leaking... but the water system was a complete nightmare when I found it.

Have you pulled the rad cap when it is running (do it cold.. no burns) and your looking for 2 things. ONE is air bubbling in the rad, signs of compressing leaking into the water system. 2 milk on the rad cap, this is oil getting into your water system.

Rev it while doing so, that growl could only be when the compression from the cyl is overwhelming.

Let me know.
Okay, I did like you suggested. There were no air bubbles or apparent milky film on the cap or the surface of the antifreeze. But after revving the motor I saw this (pic) on the driveway.

Stopped by a mechanic and of course he's selling the fear that the engine is going bad and that he's seen a lot of the I6s with this issue. He wants me to leave it with him for a day to check it out. The tail pipe is very dark black about a 1/4 in on the outside and the inside is very sooty. He said he could smell burned oil.
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