Hi. I've got an unmodified 1998 Nissan Pathfinder, 164,000 miles, 3.3L V6, 5 speed automatic transmission. Owned by an elderly couple...treated well. 10w-30 oil/filter is new and full. Same with transmission fluid. When it's first started it knocks or loudly rattles for 3 seconds. Then it stops. Once warm it will only do the startup rattle about 50% of the time. Exact same noise returns from about 1,800 to 3,200 RPM and then stops. Also, the noise quiets and sometimes disappears between 1,800 - 3,200 RPM if I let off of the accelerator and coast. It also will not do it sometimes if I'm going up a steep hill slowly with the RPMs are in that midrange, under the hill's load. The noise increases in speed and loudness with increasing RPMs. It sounds like 1 or maybe 2 cylinders of the 6, to me. The main bearings and rod bearings were changed. Looked good, some rod bearing wear on a couple but not serious. No rod or crank shaft slop was noted before or after replacement. Made no difference in the noise. The crank was NOT sanded/polished. It throws a P1400 code for EGRC Solenoid Valve error. I don't notice any idling or power issues though. It returns within a few minutes after clearing the code. Could this cause a knocking noise at certain times like I have? I've narrowed it down to 5 things based on its part time occurrence: 1. Flex plate? 2. Timing belt tensioner failing (unknown when last changed)? 3. Torque converter? 4. Hydraulic lifters? 5. EGRC Solenoid Valve? I have two short videos I recorded it and can share if you want to hear it. Thanks!
Literally the exact same problem on my 97 max, i had a bad injector that was causing the knock, somehow soot from the egr valve got into the injector amd clogged it
@@adityadharni5027 hello. Thanks! Can I email you two short videos and confirm that? It is really loud to be an injector. Did you have any codes also? Mine has no notable missing cylinders, or codes, other than the P1400 EGRC Solenoid Valve. So you cleaned or replaced all the injectors and it went away entirely and immediately? Curious how you determined what cylinder injector(s) were clogged, or were they stuck open? Would like to email you the 2 small videos to listen.
Thanks for your time and effort on this video 📹👍😎
thank u
Hi. I've got an unmodified 1998 Nissan Pathfinder, 164,000 miles, 3.3L V6, 5 speed automatic transmission. Owned by an elderly couple...treated well.
10w-30 oil/filter is new and full. Same with transmission fluid.
When it's first started it knocks or loudly rattles for 3 seconds. Then it stops. Once warm it will only do the startup rattle about 50% of the time. Exact same noise returns from about 1,800 to 3,200 RPM and then stops. Also, the noise quiets and sometimes disappears between 1,800 - 3,200 RPM if I let off of the accelerator and coast. It also will not do it sometimes if I'm going up a steep hill slowly with the RPMs are in that midrange, under the hill's load.
The noise increases in speed and loudness with increasing RPMs. It sounds like 1 or maybe 2 cylinders of the 6, to me.
The main bearings and rod bearings were changed. Looked good, some rod bearing wear on a couple but not serious. No rod or crank shaft slop was noted before or after replacement. Made no difference in the noise. The crank was NOT sanded/polished.
It throws a P1400 code for EGRC Solenoid Valve error. I don't notice any idling or power issues though. It returns within a few minutes after clearing the code. Could this cause a knocking noise at certain times like I have?
I've narrowed it down to 5 things based on its part time occurrence:
1. Flex plate?
2. Timing belt tensioner failing (unknown when last changed)?
3. Torque converter?
4. Hydraulic lifters?
5. EGRC Solenoid Valve?
I have two short videos I recorded it and can share if you want to hear it. Thanks!
Literally the exact same problem on my 97 max, i had a bad injector that was causing the knock, somehow soot from the egr valve got into the injector amd clogged it
@@adityadharni5027 hello. Thanks! Can I email you two short videos and confirm that? It is really loud to be an injector.
Did you have any codes also? Mine has no notable missing cylinders, or codes, other than the P1400 EGRC Solenoid Valve.
So you cleaned or replaced all the injectors and it went away entirely and immediately?
Curious how you determined what cylinder injector(s) were clogged, or were they stuck open?
Would like to email you the 2 small videos to listen.
Nice job! Thank you.
thank u for support
Did you take of N clean it b cuz you were blowing white smoke out your tailpipe?? Thankyou for the video 🙌
Next time captions because your talking really soft
Good
thnk you
Can you make a video on how take off those hoses that are blocking my egr , I can't figure out how to take the stuff in the way off?!
sold the car long ago
You shouldn't talk so loud when trying to make an educational video
What are you saying my guy? You’re talking too low.