Is this a normal engine sound? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-27-2013, 01:55 PM   #1
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
Is this a normal engine sound?

I was told by my bother that this is a normal sound with age (~130,800 is on my 1991 2.5L 4 cyl engine). I was told by another person that this is a very bad sound and I should get it checked immediately. I asked a mechanic about it and he said it was normal and probably lifters and I should let him know if it gets louder or stays like that all the time.

It doesn't seem to do it when I'm driving over 2000 rpms on the highway or at speed and when the engine is hot. I'll get some more audio the next time I take it out.

I have some seafoam in it, the noise hasn't reduced at all. Is 5w30 the wrong oil for it?

Here's what it sounds like after a cold start, idle, and a little revving.
Piston slap? Noisy lifters? Valves? Or is this normal and I should just ignore it for now (just a jeep thing)?
https://drive.google.com/file/d/0Bz3...it?usp=sharing

Cricketboy is offline   Quote Quick Reply
Old 11-27-2013, 02:21 PM   #2
Guesses a lot ;)

WF Supporting Member
 
OregonPlinker's Avatar
 
Join Date: Dec 2012
Location: Creswell, OR.
Posts: 878
You dont want to run seafoam for very long from what I know? Just a flush type of deal... Could be wrong, Ive never done it.

__________________
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.
OregonPlinker is offline   Quote Quick Reply
Old 11-27-2013, 02:28 PM   #3
Guesses a lot ;)

WF Supporting Member
 
OregonPlinker's Avatar
 
Join Date: Dec 2012
Location: Creswell, OR.
Posts: 878
Sounds like you definitely need an oil change. A little lifter noise isnt too bad. Ive seen rigs run for years with noisey lifters. If it gets worse or starts missing or your oil presure gets real low then have it checked out. Does it do it consistantly or just sometimes ?
__________________
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.
OregonPlinker is offline   Quote Quick Reply
Old 11-27-2013, 02:31 PM   #4
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
Quote:
Originally Posted by OregonPlinker View Post
You dont want to run seafoam for very long from what I know? Just a flush type of deal... Could be wrong, Ive never done it.
I'm just running it through before my next oil change that's due in the next 1000 miles. I purchased this Jeep not long ago and I don't know what the previous owner's oil change history was.

I know for sure that the seafoam has NOT CAUSED the tapping/clicking sound as I only put the seafoam in a few days ago and it's been making noise the whole time.

OregonPlinker, my oil pressure is usually around 60 or slightly more on a cold start up and when it's been running for a while it goes down to below 50-45 and holds steady. I think it needs an oil change sooner as I've been driving it a lot. Since I added the seafoam the oil has gone from a golden color to a dark brown/black.
Cricketboy is offline   Quote Quick Reply
Old 11-27-2013, 02:44 PM   #5
Guesses a lot ;)

WF Supporting Member
 
OregonPlinker's Avatar
 
Join Date: Dec 2012
Location: Creswell, OR.
Posts: 878
Yeah man 1000 miles is a LONG time to leave any detergent/solvent in your engine. Id say 20-40 miles would be plenty of time to do whatever its gonna do.

Sounds like your oil pressure is fine to me. If its made that noise since you got it and its not getting worse I wouldnt worry about it. It does sound like lifters to me but my wife has the TV blasting in the living room...lol
__________________
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.
OregonPlinker is offline   Quote Quick Reply
Old 11-27-2013, 02:52 PM   #6
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
Quote:
Originally Posted by OregonPlinker View Post
Yeah man 1000 miles is a LONG time to leave any detergent/solvent in your engine. Id say 20-40 miles would be plenty of time to do whatever its gonna do.

Sounds like your oil pressure is fine to me. If its made that noise since you got it and its not getting worse I wouldnt worry about it. It does sound like lifters to me but my wife has the TV blasting in the living room...lol
Oh god no, no I didn't have the seafoam in that long . That's when my next oil change is due. I have a thousand miles until my next oil change is due. I should have clearly stated that. I only put the seafoam in about 60-70 miles ago.

And when I change the oil, what viscosity should I use? I live in Fargo/Moorhead so the temps can get below -30 F sometimes. Should I just stick with 5w30? I do a lot of highway driving and in town driving. I frequently drive from Minneapolis and back at freeway speed, 220 miles, 440 round trip once or twice a month and some light off-roading.
Cricketboy is offline   Quote Quick Reply
Old 11-27-2013, 03:15 PM   #7
Guesses a lot ;)

WF Supporting Member
 
OregonPlinker's Avatar
 
Join Date: Dec 2012
Location: Creswell, OR.
Posts: 878
If you put the seafoam in the crankcase 60-70 miles ago your due for an oil change now, regardless of mileage or whatever in my opinion.

As fas as what oil to use, I dont know... Ive never had one of the 4 cylinders but my guess is 10-w40 for colder climates? Do you have an owners manual or haynes or something? They should give you some ideas. I run 10-w30 in my 4.0 but if it freezes here its rare... Your in a little cooler climate.haha
__________________
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.
OregonPlinker is offline   Quote Quick Reply
Old 11-27-2013, 04:00 PM   #8
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
Quote:
Originally Posted by OregonPlinker View Post
...Do you have an owners manual or haynes or something? They should give you some ideas...
I do not, didn't have one with it. Looks like I'll have to pick one up somewhere.
Cricketboy is offline   Quote Quick Reply
Old 11-27-2013, 04:12 PM   #9
Guesses a lot ;)

WF Supporting Member
 
OregonPlinker's Avatar
 
Join Date: Dec 2012
Location: Creswell, OR.
Posts: 878
A haynes manual would be the best 30 bucks you spend on that jeep if you plan on keeping it. Your gonna end up working on it at some point and that manual will come in real handy if you do the work yourself. Save you a lot of money in the long run.
__________________
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.
OregonPlinker is offline   Quote Quick Reply
Old 12-07-2013, 06:55 PM   #10
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
I did end up getting a Haynes manual. I also uploaded a video that lets you hear the engine noise better.
Cricketboy is offline   Quote Quick Reply
Old 12-09-2013, 12:08 PM   #11
Jeeper
 
Join Date: Jan 2010
Location: Las Cruces, NM
Posts: 2,291
Could be a rod bearing or worn wrist pin. Not that hard to drop the pan and install new rod bearings and you could check for bad wrist pin at the same time.
__________________
2013 WRANGLER SPORT 2 DR., V-6 ,AUTO,HARD TOP
(Sold)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights
Garyk is offline   Quote Quick Reply
Old 12-09-2013, 05:46 PM   #12
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
I'll have to wait till spring. Don't have a garage or access to one. Or I'll have to save up and have someone do it for me. The weather's been consistently below zero now.
Cricketboy is offline   Quote Quick Reply
Old 12-10-2013, 01:19 PM   #13
Jeeper
 
Join Date: Jan 2010
Location: Las Cruces, NM
Posts: 2,291
My old 94 sounded just like that and it had over 217k when I sold it and as far as I inow its still running..
__________________
2013 WRANGLER SPORT 2 DR., V-6 ,AUTO,HARD TOP
(Sold)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights
Garyk is offline   Quote Quick Reply
Old 12-10-2013, 04:48 PM   #14
Jeeper
 
dwsutton's Avatar
 
Join Date: Nov 2013
Posts: 93
Images: 9
Sounds more than lifters to me also. My guess is bottom end.
dwsutton is offline   Quote Quick Reply
Old 12-10-2013, 06:21 PM   #15
Jeeper
 
1st87yj's Avatar
 
Join Date: Mar 2013
Location: NE Iowa
Posts: 242
Sounds just like my jeep! Mine burns oil, was using 5w30. After 500 miles it would be a quart low. Swiched to 15w40, now it takes 1, 000 miles to burn a quart. Concerned about the thicker oil (ne iowa temps have been around 0║). Please post if you find the right weight oil to run, or whatever the factory used?
1st87yj is offline   Quote Quick Reply
Old 12-10-2013, 06:37 PM   #16
Jeeper
 
laredo's Avatar
 
Join Date: Jun 2013
Location: Near Warren, Ohio
Posts: 515
laredo is online now   Quote Quick Reply
Old 12-10-2013, 06:49 PM   #17
Jeeper
 
1st87yj's Avatar
 
Join Date: Mar 2013
Location: NE Iowa
Posts: 242
Is that out of the manuel for a 2.5l ?
1st87yj is offline   Quote Quick Reply
Old 12-10-2013, 06:55 PM   #18
Jeeper
 
DirtyRob's Avatar
 
Join Date: Sep 2011
Location: Sampson County N.C.
Posts: 1,130
Images: 3
Quote:
Originally Posted by Cricketboy View Post
Oh god no, no I didn't have the seafoam in that long . That's when my next oil change is due. I have a thousand miles until my next oil change is due. I should have clearly stated that. I only put the seafoam in about 60-70 miles ago.

And when I change the oil, what viscosity should I use? I live in Fargo/Moorhead so the temps can get below -30 F sometimes. Should I just stick with 5w30? I do a lot of highway driving and in town driving. I frequently drive from Minneapolis and back at freeway speed, 220 miles, 440 round trip once or twice a month and some light off-roading.

That is your problem. You have probably washed the bearings out.
You should only add a solvent to oil for one warm-up cycle on an engine only if needed. I do this when I get a Jeep that hasn't been maintained and I use kerosene in the crankcase for about 5 mins only to remove sludge.
I hate to say it, but you may have done some real damage. Drain the oil a.s.a.p. , and you may start to have some oil leaks from here on out from have solvent in the oil so long.
As far as the oil weight, 5w-30 should be good for where you live.
__________________
wherever you go there you are..........
DirtyRob is offline   Quote Quick Reply
Old 12-10-2013, 07:12 PM   #19
Jeeper
 
laredo's Avatar
 
Join Date: Jun 2013
Location: Near Warren, Ohio
Posts: 515
The picture i posted is from the haynes repair manual for all wranglers. 87-03 all engines.
laredo is online now   Quote Quick Reply
Old 12-10-2013, 07:21 PM   #20
Jeeper
 
laredo's Avatar
 
Join Date: Jun 2013
Location: Near Warren, Ohio
Posts: 515
Seafoam does NOT damage your engine, it's actually recomended to add to your oil EVERY oil change 1 oz. For every quart of oil.
laredo is online now   Quote Quick Reply
Old 12-10-2013, 08:16 PM   #21
Jeeper
 
Join Date: Aug 2011
Location: north of St.Franisville La.
Posts: 1,877
Send a message via Yahoo to Nubby55
If your bottom end was bad and the bearings washed out you would have low oil pressure, from here it sounds like piston slap, or a bad lifter, or cam and lifter.

If it's piston slap, run it till you just can't stand the noise, then rebuild the engine, if it's a bad lifter and or a flat cam, it may show on a compression check, easy to do, and go from there. good hunting!
Nubby55 is offline   Quote Quick Reply
Old 12-10-2013, 08:35 PM   #22
Jeeper
 
Join Date: Dec 2013
Posts: 28
Quote:
Originally Posted by DirtyRob View Post

That is your problem. You have probably washed the bearings out.
You should only add a solvent to oil for one warm-up cycle on an engine only if needed. I do this when I get a Jeep that hasn't been maintained and I use kerosene in the crankcase for about 5 mins only to remove sludge.
I hate to say it, but you may have done some real damage. Drain the oil a.s.a.p. , and you may start to have some oil leaks from here on out from have solvent in the oil so long.
As far as the oil weight, 5w-30 should be good for where you live.
How much kerosene do u put in it and do u put it in with the oil?
jeepmtr is offline   Quote Quick Reply
Old 12-10-2013, 10:44 PM   #23
Jeeper
 
dwsutton's Avatar
 
Join Date: Nov 2013
Posts: 93
Images: 9
If you maintain your oil change intervals or better yet go with synthetic oil which tends to clean out the sludge IMO from vehicles I've switched over you don't need to run any crap thru the motor. If there is a great amount of sludge then the damage could already have been done and washing the bearings out only makes it worse. Yeah right before an oil change I have heard of kerosene, rislone, seafoam, and the best I've heard is trans fluid due to it having so much detergent - but only for a really short time before draining.
dwsutton is offline   Quote Quick Reply
Old 12-10-2013, 10:54 PM   #24
Jeeper
 
YellowJeepGuy94's Avatar
 
Join Date: Aug 2013
Location: Texas
Posts: 77
Quote:
Originally Posted by OregonPlinker View Post
You dont want to run seafoam for very long from what I know? Just a flush type of deal... Could be wrong, Ive never done it.
Don't give him advice on what you don't know. OP the longest you should run seafoam is 250 max. I usually just put it in the crankcase when I feel up the gas tank then run it close to E and get the oil change. Sea Foam does wonders.
YellowJeepGuy94 is offline   Quote Quick Reply
Old 12-10-2013, 11:08 PM   #25
Jeeper
 
dwsutton's Avatar
 
Join Date: Nov 2013
Posts: 93
Images: 9
According to Mobil -- If your engine has excessive sludge deposits due to less-than-adequate maintenance practices, Mobil 1 High Mileage can help by reducing the sludge left behind in your engine. For severe cases of sludge, short oil change intervals (3,000 - 5,000 miles) are recommended for the first two-three oil changes as reduction of the sludge takes place. In cases of engine damage that may have resulted from poor maintenance, even Mobil 1 synthetic oil cannot remedy years of neglect."
dwsutton is offline   Quote Quick Reply
Old 12-10-2013, 11:18 PM   #26
Jeeper
 
dwsutton's Avatar
 
Join Date: Nov 2013
Posts: 93
Images: 9
Quote:
Originally Posted by YellowJeepGuy94 View Post
Don't give him advice on what you don't know. OP the longest you should run seafoam is 250 max. I usually just put it in the crankcase when I feel up the gas tank then run it close to E and get the oil change. Sea Foam does wonders.
I agree YJG I also would say that the recommended amount of Seafoam is not that much - dumping in a couple of cans in a 4 banger that has been abused by no oil changes then driving the crap out of is also the time to look for a replacement motor.
dwsutton is offline   Quote Quick Reply
Old 12-10-2013, 11:37 PM   #27
Supporting Member

WF Supporting Member
 
CyndiB's Avatar
 
Join Date: Jul 2011
Location: Inland Empire, CA
Posts: 871
From the Sea Foam website:

Sea Foam Motor Treatment may be used in an oil crankcase two separate ways, depending on your needs and expectations. Sea Foam Motor Treatment is most commonly used as a pre-service, old oil residue re-liquefier / cleaner. It can also be used as an after-service oil additive. In either application, Sea Foam Motor Treatment will safely and slowly re-liquefy old oil residue. Each method is described below:

As a pre-service cleaner for old oil residue, (and to address valve train noise and timing chain hydraulic tensioner noise), pour 1 1/2 ounces of Sea Foam Motor Treatment into the engine oil crankcase for each quart of oil capacity, including filter. Drive a minimum of 30 minutes (a maximum of 100 miles), and then do your oil change service. This begins the process of safely/slowly re-liquefying the old oil residue so contaminants may flow and be filtered away. Your old oil will quickly become much dirtier, so an oil change service will be necessary soon after this pre-service treatment. This is also a great idea for turbocharged and supercharged applications where oils deteriorate so quickly due to heat, leaving those residues that need cleaning.
As an after-service additive for fresh oil, nearly fresh oil, or used oil that is NOT yet ready to be changed (based on mileage since last service). Add the same amount of Sea Foam Motor Treatment to the crankcase as described above, and then regularly monitor your oil for color and clarity. Set a predetermined schedule for checking the oil condition on a mileage, timed, or event basis (such as every time you gas up, etc.) to determine when an oil service is necessary. Monitoring of the oil for color and clarity will tell you when it is time to do an oil change service. NOTE: Do not exceed 3,000 miles without changing the oil.
Remember, Sea Foam Motor Treatment is safe to use with all synthetic oils. Purely synthetic oils, and blends of synthetic and petroleum-based oils, were engineered to be 100% compatible with petroleum-based oils of all brands, and vice versa. Without this compatibility, oil manufacturers and engineers would be liable for the results of mixing non-compatible lubricants. Since Sea Foam Motor Treatment only contains petroleum-based oils, it is entirely compatible with synthetic oils.

Remember, when using Sea Foam Motor Treatment in your crankcase:

Check your oil and monitor its color & clarity to determine need for oil change service!
Change your oil when it gets dirty!
CyndiB is online now   Quote Quick Reply
Old 12-11-2013, 11:20 AM   #28
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
Quote:
Originally Posted by 1st87yj View Post
Sounds just like my jeep! Mine burns oil, was using 5w30. After 500 miles it would be a quart low. Swiched to 15w40, now it takes 1, 000 miles to burn a quart. Concerned about the thicker oil (ne iowa temps have been around 0║). Please post if you find the right weight oil to run, or whatever the factory used?
Mine burns oil too! About as much as yours. I'm concerned about putting thicker oil in it though as it's been very cold here lately. -25 F a few nights so far and consistently below 0 the past two weeks up here in Fargo Moorhead and I don't have a block heater installed. I went with what the Haynes manual said. The oil was recently changed and input 5w30 in. Today the noise randomly vanished while I was accelerating out of the parking lot on my way home from work. The noise starts about a minute after a cold start and gradually builds and plateaus and sometimes disappears when I'm accelerating. Also the noise gets louder when there's a heavy load on the engine (like accelerating onto an interstate) I back off the gas and then give it a little gas again and the noise subsides. The noise concerns me somewhat but my brother's Jeep Grand Cherokee Laredo makes a similar noise and he has 312,000 miles on it and it still runs strong. I've never noticed a performance drop with my jeep no matter how loud or quite the noise is.
Cricketboy is offline   Quote Quick Reply
Old 12-11-2013, 11:27 AM   #29
Jeeper
 
Join Date: Nov 2013
Location: Moorhead, MN
Posts: 79
Quote:
Originally Posted by DirtyRob View Post
That is your problem. You have probably washed the bearings out. You should only add a solvent to oil for one warm-up cycle on an engine only if needed. I do this when I get a Jeep that hasn't been maintained and I use kerosene in the crankcase for about 5 mins only to remove sludge. I hate to say it, but you may have done some real damage. Drain the oil a.s.a.p. , and you may start to have some oil leaks from here on out from have solvent in the oil so long. As far as the oil weight, 5w-30 should be good for where you live.
It made the noise before I ran Seafoam through it.
Cricketboy is offline   Quote Quick Reply
Old 12-11-2013, 04:28 PM   #30
Jeeper
 
DirtyRob's Avatar
 
Join Date: Sep 2011
Location: Sampson County N.C.
Posts: 1,130
Images: 3
Sorry, I didn't read that in the post. I hope you get it figured out. I couldn't get the noise audio to load.
2 of my Jeeps make a lot of valve train noise like a diesel. They both have well over 200k miles on them. Good luck

__________________
wherever you go there you are..........
DirtyRob is offline   Quote Quick Reply
Reply

Tags
engine sound slap 2.5

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Vendor Spotlight (Deals & More)
logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!
Jeep Parts - Jeep Wheels - Jeep Soft Tops
» Recent Threads
Mpg

» Popular Tags
2013 2014 advice audio axle bestop body lift build bumper camping clutch death wobble doors electrical engine exhaust fenders for sale frame hard top hardtop help advice install jeep jeep tj jeep wrangler jeep yj jku leak led lift lift advice lift kit lights manual mud newbie noise oem radiator radio rear rims rubicon rust sahara shocks soft top speakers sport springs steering stereo stock subwoofer suspension suspension lift teraflex tire tires top transfer case transmission unlimited wheels wheels and tires winch wiring wrangler wrangler tj
» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 09:53 AM.



Jeep«, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC