knocking sound when starting the engine cold

PitViper · **Posted:** Sat Apr 29, 2006 10:46 pm

Does anyone else notice this? It's pretty loud when the motor is cold but I can still notice it after it warms up. I only have 14k miles on it and it's pretty much done it after about 2 or 3 weeks I got it

It runs fine at highway speeds but has less power than the 04 I had. I always thought that it was because the 04' was 2wd it got more power to the rear wheels but i don't know... it sure feels like i'm loseing alot of lowend torque the more I drive it. (getting worse over time)

I need to take it to the dealer I think.

PitViper · **Posted:** Sat Apr 29, 2006 10:48 pm

BTW I've used mobil one oil since day one.

the1jferg · **Posted:** Sun Apr 30, 2006 8:44 am

fram oil filter??

05kjrenny · **Posted:** Sun Apr 30, 2006 9:02 am

i also have a 2005 renegade and i use amsoil

and mopar filter
every 5 thousand miles and i have 15,000 miles now and mine has concerned me since we bought it
it sounds like it very similar sounds as yours, i asked the dealer about this last weekend and he told me that its because we only drive it every couple of weeks, we only drive this for long trips to the beach or somewhere fun
we maybe sometimes dont even start it for two weeks .

sounds pretty loud when its less than 55 degrees outside
i know this dont help but mine sounds the same also
richey

PitViper · **Posted:** Sun Apr 30, 2006 9:15 am

mobil one filter also

This is my DD so it doesn't sit very long...

smitty1938 · **Posted:** Sun Apr 30, 2006 10:00 am

I have a 05 limited. I do not have any knocking at any time cold or hot. I have 4500 miles on the O.D. Dealer does oil changes. The dealer gives a lifetime warranty on the engine , transmission, and running gear if you purchase your vehicle from them and let them service the vehicle.

InCommando · **Posted:** Sun Apr 30, 2006 11:38 am

Mine rattles a bit on start up if it sits overnight. This just started after the last oil change, all of which were peormed by the dealer ( every 3,000 miles- first 15 were "free" with purchase-like it isn't included somewhere in what I paid....LOL) . I appears to be a mopar filter, but the sound is typical of what happens when the oil "drains back" thru through the filter. I called the dealer and got it on record, but theyswear it is normal. If it continues after the next oil change i will investigate further.

Jeepjeepster · **Posted:** Sun Apr 30, 2006 12:41 pm

Mine seems to do this sometimes. There was a thread awhile back and everyone said it was normal, so IDK.

Littlehorn · **Posted:** Mon May 01, 2006 2:38 pm

Mine is the same way... The rolling clink/haggle or bearing type noise that gets quicker when accel. I hear it and it sounds bad to me. Like the cam is getting some damage. I have not gotten a warning or error message yet. Side Notes: I even had some very bad performance drop over a month and 1/2 period and then reset the computer (- battery cable off for 1 hour). I noticed that I was getting about 12 mpg. The reset seemed to provide an 80% improvement. I then noticed on that day that I had a lot of soot at the exhaust pipe. Seems that it has been running a bit rich. I am set for a visit to the Dealer this week (or whenever my wife goes into labor).

I did put it in the Dealership's shop about 2 months ago (before the computer reset) for this sound at cold startup. They said that nothing is wrong. Funny, it ran better for the remainder of the tank of gas. I think they added and boost.

Has anyone noticed a drop in MPG or excessive soot at the tailpipe?

Jeepjeepster · **Posted:** Mon May 01, 2006 4:34 pm

Littlehorn wrote:

Mine is the same way... The rolling clink/haggle or bearing type noise that gets quicker when accel. I hear it and it sounds bad to me. Like the cam is getting some damage. I have not gotten a warning or error message yet. Side Notes: I even had some very bad performance drop over a month and 1/2 period and then reset the computer (- battery cable off for 1 hour). I noticed that I was getting about 12 mpg. The reset seemed to provide an 80% improvement. I then noticed on that day that I had a lot of soot at the exhaust pipe. Seems that it has been running a bit rich. I am set for a visit to the Dealer this week (or whenever my wife goes into labor).

I did put it in the Dealership's shop about 2 months ago (before the computer reset) for this sound at cold startup. They said that nothing is wrong. Funny, it ran better for the remainder of the tank of gas. I think they added and boost.

Has anyone noticed a drop in MPG or excessive soot at the tailpipe?

Haha, what in the world does the wife going into labor have to do with going to the dealer? Soot is normal in the tail pipe, dont know what you mean by excessive.

I have no clue why the MPG would drop of like that? Switch from winter to summer maybe?

PitViper · **Posted:** Mon May 01, 2006 6:11 pm

I think I have fixed my power loss. but it still makes noise at start up.

I over filled the oil on last change.... Also the PCV valve and line going to the intake had a excessive amount of oil in it.... (oil ran out when I pulled the line off.)

I also reset the computer.

Littlehorn · **Posted:** Mon May 01, 2006 6:17 pm

Quote:

Haha, what in the world does the wife going into labor have to do with going to the dealer? Soot is normal in the tail pipe, dont know what you mean by excessive.

I have no clue why the MPG would drop of like that? Switch from winter to summer maybe?

Well, I don't have the Free Loaner Car in my warrenty. So, I am trying to get this done when I really don't need my Liberty for a while.

I did drive the liberty last summer and the MPG was higher until this Jan-Feb.

PitViper, Did the over-filling cause the excessive oil in your PCV/line? Or, was this a condition before the over-fill? Did the over-filling help your power loss?

Chris

PitViper · **Posted:** Mon May 01, 2006 6:22 pm

I think the oil in the line was from the over fill... I think that caused the power loss.

I cleaned the valve and line and It runs much better on the highway now.

Littlehorn · **Posted:** Wed May 03, 2006 9:57 am

Quote:

Has anyone noticed a drop in MPG or excessive soot at the tailpipe?

Soot is normal in the tail pipe, dont know what you mean by excessive.

Does this look excessive? I noticed this condition at about 5000 miles. All of the other KJs I've seen around town do not have this sooty-ness.

Sean · **Posted:** Wed May 03, 2006 10:01 am

smitty1938 wrote:

I have a 05 limited. I do not have any knocking at any time cold or hot. I have 4500 miles on the O.D. Dealer does oil changes. The dealer gives a lifetime warranty on the engine , transmission, and running gear if you purchase your vehicle from them and let them service the vehicle.

lifetime powertrain warranty if you let them service it? that sounds like quite the deal to me. has anyone heard of this before?

smitty1938 · **Posted:** Wed May 03, 2006 10:40 am

Check this out.
http://www.truckingduo.com/specials.htm

knocking sound when starting the engine cold

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