engine ping

libbygreen · **Posted:** Thu Sep 27, 2007 10:24 pm

I have been noticing a pinging similar to pre ignition knock when I come off highway speeds and turn onto another road and then accelerate normally. I have had it into 2 different dealers and neither one can hear it. Anyone else hear this noiise?

3.7 motor has 12,000 miles on it.

JJsTJ · **Posted:** Thu Sep 27, 2007 10:32 pm

How long has it been going on and what gas are you using?

libbygreen · **Posted:** Thu Sep 27, 2007 10:50 pm

about 2 months and i use 87. one dealer told me to use 89 but that didnt make any difference

Rush345 · **Posted:** Fri Sep 28, 2007 12:20 am

Have you gotten any Error codes or try changing brands of Gas???? :?:

sleeve84028 · **Posted:** Fri Sep 28, 2007 7:43 am

I'd switch gas stations first before trying anything else.

BeepBeepJeepJeep · **Posted:** Fri Sep 28, 2007 9:02 am

libbygreen wrote:

I have been noticing a pinging similar to pre ignition knock when I come off highway speeds and turn onto another road and then accelerate normally. I have had it into 2 different dealers and neither one can hear it. Anyone else hear this noiise?

3.7 motor has 12,000 miles on it.

I have no idea if that's what it is or not, but I have noticed a noise similar to what it sounds like when you bring the clutch up too fast, but not nearly as aggressive. I only notice it when my windows are down, and the noise comes and goes pretty frequently for me...

It's hard to explain because it's hard to hear, but yes I believe I have the same noise but I also have 112k mi on mine...

onejohny · **Posted:** Fri Sep 28, 2007 9:11 am

I seem to have this too especially with the AC on. When I tried 93 octane it goes away but my mileage suffers.

hardhittinz · **Joined:** Tue Jul 03, 2007 10:44 pm **Posts:** 195

i have alittle bit of it to.

ryno · **Posted:** Fri Sep 28, 2007 8:25 pm

You might look into having your timing belt replaced. Your dealership should do that for you under warranty.

tjkj2002 · **Posted:** Fri Sep 28, 2007 8:30 pm

ryno wrote:

You might look into having your timing belt replaced. Your dealership should do that for you under warranty.

No timing belt in a 3.7L V-6 in the KJ,it does have 3 timing chains.

ryno · **Posted:** Fri Sep 28, 2007 8:45 pm

tjkj2002 wrote:

No timing belt in a 3.7L V-6 in the KJ,it does have 3 timing chains.

True that. It must have been a part for the 2.4L that I saw. Thanks for correcting me. After all, I'm just an ignorant college n00b!

myjeepwalks · **Posted:** Sat Sep 29, 2007 1:52 am

sleeve84028 wrote:

I'd switch gas stations first before trying anything else.

That's what i did and it solved my pinging, all depends on the station. I swear some of these stations must water it down to 47 octane. If i get quality gas i get no pinging. Junk gas pings and gets horrible gas mileage.

BeepBeepJeepJeep · **Posted:** Sat Sep 29, 2007 10:02 am

myjeepwalks wrote:

sleeve84028 wrote:

I'd switch gas stations first before trying anything else.

That's what i did and it solved my pinging, all depends on the station. I swear some of these stations must water it down to 47 octane. If i get quality gas i get no pinging. Junk gas pings and gets horrible gas mileage.

That's good information, thanks. Next time I fill up I'll go to a new station...

tjkj2002 · **Posted:** Sat Sep 29, 2007 12:07 pm

ryno wrote:

tjkj2002 wrote:

No timing belt in a 3.7L V-6 in the KJ,it does have 3 timing chains.

True that. It must have been a part for the 2.4L that I saw. Thanks for correcting me. After all, I'm just an ignorant college n00b!

You are right about the 2.4L 4-banger,it does have a timing belt.

DarbyWalters · **Posted:** Sat Sep 29, 2007 12:13 pm

The 3.7L is known to break valve springs...easy to check if you take vavle cover off. I had three cracked on one side at 50,000 miles. I also had a bad wrist pin...that was a bit more of a pain to fix. Bought the whole piston/rod assembly and replaced it thru the bottom end...I did run a stone to scratch the cylinder walls. Fixed the problem.

_UnLiMiTeD_ · **Posted:** Sat Sep 29, 2007 9:32 pm

known? first time i have ever heard of that problem lol

libbygreen · **Posted:** Sat Sep 29, 2007 10:22 pm

I am going to try a different gas station as suggested. Maybe I am being too picky if only I can hear it. But at least if engine damage is done because of it, it is documented that I have been in twice for an engine noise.

Thanks for all the replies. Love this board. I have Gotten a lot of great info from this site.

engine ping

Who is online