Pinched exhaust, reason for sounding like diesel?
#1
CF Veteran
Thread Starter
Pinched exhaust, reason for sounding like diesel?
Edit: I now know that dent in the exhaust is factory. My apologies for not knowing! Please read through my post and let me know your thoughts, thanks!
Back again for help from the experts. This time I have a picture!
Can't get the picture facing the right way. That's right below the header, next to the oil pan.
Is this the reason my XJ sounds like a diesel on start ups? It only sounds diesel/clattery on start ups. It's been doing this a decent while now, as I posted about a "knock after cold start up" back in November. It only lasts until I've driven a couple hundred feet then it sounds just fine.
I've checked the torque convert bolts, all are tight. I'm running Rotella T6 5w-40 and a Wix 51515 oil filter. Oil level is spot on and looks good. Didn't have any metal shavings when I changed the oil about a month ago. Oil pressure climbs right up to about 45ish on startup, and I average 18.5 mpg (25% city, 75% highway). So I don't think it's something serious, but I'm no expert. Plus I would expect something would have gotten much worse if it was a serious issue, and that it would be a more constant noise.
Is this just normal 4.0 sounds, and I'm being paranoid as usual? Again it's been happening a while now. I've heard possibly oil filter, but again, been hearing it a while.
97' Sport, 4.0L, AW4, NP231, 72k
Back again for help from the experts. This time I have a picture!
Can't get the picture facing the right way. That's right below the header, next to the oil pan.
Is this the reason my XJ sounds like a diesel on start ups? It only sounds diesel/clattery on start ups. It's been doing this a decent while now, as I posted about a "knock after cold start up" back in November. It only lasts until I've driven a couple hundred feet then it sounds just fine.
I've checked the torque convert bolts, all are tight. I'm running Rotella T6 5w-40 and a Wix 51515 oil filter. Oil level is spot on and looks good. Didn't have any metal shavings when I changed the oil about a month ago. Oil pressure climbs right up to about 45ish on startup, and I average 18.5 mpg (25% city, 75% highway). So I don't think it's something serious, but I'm no expert. Plus I would expect something would have gotten much worse if it was a serious issue, and that it would be a more constant noise.
Is this just normal 4.0 sounds, and I'm being paranoid as usual? Again it's been happening a while now. I've heard possibly oil filter, but again, been hearing it a while.
97' Sport, 4.0L, AW4, NP231, 72k
Last edited by TFitzPat87; 04-27-2015 at 06:12 AM.
#3
CF Veteran
Thread Starter
Seriously? Wow, I feel like a moron now. My apologies.
I wish I had an idea of why it sounds like a diesel on start up.
I wish I had an idea of why it sounds like a diesel on start up.
Trending Topics
#8
CF Veteran
Thread Starter
Thanks Andrew, I've thought about that too. Maybe piston slap? But I thought that was more in cold weather. It honest rides pretty damn nice for the most part. Some days better than others, but I think that's normal.
#11
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
#13
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
#14
CF Veteran
Thread Starter
Lol! Know the feeling.
Appreciate it guys. Considering the length of time this has been going on, I'm assuming it's not serious.. Will taking the belt off and starting it up for a few second tell me anything? I've come across this while doing my searches. Just not sure exactly what it will tell me.
Appreciate it guys. Considering the length of time this has been going on, I'm assuming it's not serious.. Will taking the belt off and starting it up for a few second tell me anything? I've come across this while doing my searches. Just not sure exactly what it will tell me.
#15
Senior Member
Join Date: Apr 2015
Location: Connecticut
Posts: 734
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1995
Model: Cherokee
Engine: 4.0
Lol! Know the feeling. Appreciate it guys. Considering the length of time this has been going on, I'm assuming it's not serious.. Will taking the belt off and starting it up for a few second tell me anything? I've come across this while doing my searches. Just not sure exactly what it will tell me.