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Old 07-08-2014, 05:19 AM   #1
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Engine "tick"

My first Jeep (2001 4.0L 5spd 136K mi)

- During a cold start, she makes a ticking noise until the oil pressure ramps up.
- Sometimes the oil gauge will not work when I first cranked her up.
- Once at operating temperature, if I turn her off for about 5 minutes and crank her back up, the "check gauges" warning light activates and beeps 6 or 8 times.

Any ideas would be greatly appreciated; thanks in advance!

RW

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Old 07-08-2014, 05:38 AM   #2
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Looks like oil is not flowing in the engine. The ticking is the lifters not getting oil.
Could be bad oil pump, or sludge in the engine blocking oil passages.
How long have you owned the Jeep? How often do you change the oil?

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Old 07-08-2014, 01:27 PM   #3
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Quote:
Originally Posted by tony t View Post
looks like oil is not flowing in the engine. The ticking is the lifters not getting oil.
Could be bad oil pump, or sludge in the engine blocking oil passages.
How long have you owned the jeep? How often do you change the oil?
x2
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Old 07-09-2014, 04:03 AM   #4
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Im having same issue? Very curious what could be to blame?
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Old 07-09-2014, 05:58 AM   #5
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My 4.0 bad when cold. Lifters/piston slap due to worn out engine components. After warmed up she ran quite and smooth. A good quality filter and oil helped. You can try MMO too.
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Old 07-11-2014, 07:03 AM   #6
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What presumably caused my engine tick on cold starts was the fact that the previous owner only changed the oil once during the year he had the Jeep, but he had only driven it 1000 mi. (so he says). I'm guessing that's what probably clogged up critical oil pressure regulating components.

My plan to fix it:
1. oil change; using semi-synthetic oil + entire bottle (32 oz.) of Lucas Heavy Duty Oil Stabilizer
2. replace oil sending unit
3. keep an eye & ear out for the "tick" for the next 1000 miles to let the Lucas do its thing
4. change oil again after 1000 mi.; use 1/2 bottle of Lucas this time
5. if tick is still there, replace oil pump (which is around $450 for just the parts)

#1&2 are done; tick is still there when cold starting however it's not as noticeable and it only lasts about a second then it's fine. With the Lucas I notice that the oil pressure is higher (just a hair over 40) than before and it's not dropping off when at idle rpm like it was. Maybe, just maybe that did it. We'll see.

OR...If I can scrounge up $500 in change from my couch I might go ahead and replace the oil pump instead of waiting to see if #1 & 2 fixed it because a good rebuilt engine is well over $5000 from what I hear. That kind if change is definitely not in my couch, nor my wallet!
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Old 07-11-2014, 07:07 AM   #7
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Originally Posted by kjeeper10 View Post
my 4.0 bad when cold. Lifters/piston slap due to worn out engine components. After warmed up she ran quite and smooth. A good quality filter and oil helped. You can try mmo too.
"mmo"??
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Old 07-11-2014, 09:03 AM   #8
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Marvels mystery oil
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Old 07-11-2014, 09:10 AM   #9
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Parts for an oil pump replacement, (pump, oil pan gasket, pickup tube) should run you less than $200 for a 4.0. But that isn't your problem based on the changes that have occurred in post #6. A couple of oil changes and you should be fine. A one second "tick" at startup really shouldn't be classified as a tick. That would be normal operation.
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Old 07-11-2014, 04:19 PM   #10
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Originally Posted by Blackhawk36 View Post
Parts for an oil pump replacement, (pump, oil pan gasket, pickup tube) should run you less than $200 for a 4.0. But that isn't your problem based on the changes that have occurred in post #6. A couple of oil changes and you should be fine. A one second "tick" at startup really shouldn't be classified as a tick. That would be normal operation.
I appreciate the $$ info! That clears up quite a few unasked questions I had.
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Old 08-11-2014, 04:37 PM   #11
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instant replay - purchased an 01 Jeep Sport 4L 5spd, 137K mi. only 1 oil change was performed over the course of 1 yr prior to my purchase of the Jeep.

Drove it a few hundred miles; very noticeable top-end engine "tick" on cold starts; "check gauges" light & warning beep would activate on warm starts; replaced oil sending unit and changed the oil.

1st oil change - 10W-40 synthetic (not sure of brand - my bad) & 1 qt. of Lucas - not sure of oil filter brand either but i'm sure it was a cheap one - my bad again.

No "check gauges" light, warning beep or top-end "tick"

2nd oil change - 10W-30 Mobil 1 synthetic, 1 qt Lucas, NAPA Gold (1515) over-sized filter. After oil change there was a VERY noticeable bottom-end "tick" at idle (@700rpm) that was not there prior to the oil change. Probably shouldn't have done it, but I drove her about 90 miles thinking it would work itself out. Yea right, tick still very noticeable at idle. Hope I didn't screw something up!

Was advised to change oil again on the basis that non-synthetic Lucas & synthetic oil was not a good mix. Something about Lucas, being as thick as it is, messes with "advanced oil molecular technology". I'm like WTF??, seriously? Hmff, sounds somewhat believable, sort of, but whatever, I don't want to screw up my engine so 'll try almost anything.

3rd oil change - kept NAPA over-sized filter on; opted for some conventional 10W-40 Mobil 1 Super for high mileage engines. She still has that bottom-end "tick" but it's not as loud as before - I think. C'mon girl, work with me here!

Plan to drive her 100 mi or so & go from there. I'm thinking it's the oil pump because I've noticed a slight drop in oil pressure with the over-sized filter. I guess for "s#!*$ & giggles" I could change back to the stock sized filter, maybe a Wix brand, and see what that does.

anyhooz...still love my Jeep!
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Old 08-11-2014, 04:48 PM   #12
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Are you 100% positive the tick is not from an exhaust leak at the exhaust manifold, that is a common problem?

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