Strange vibe?

GoldenPath · Postby **GoldenPath** » Wed Apr 17, 2013 1:09 pm

Hey guys and gals, finally joined this forum after some lurking.

My 2005 Pathfinder 2WD Auto has 95,000 miles, and the bypass has been done a LONG time ago. Timing chain/guides have been replaced.
I now have this strange vibration in my floorboard that I can feel through the accelerator pedal. It happens roughly between 2200-2300rpms. I know this truck doesn't have a throttle cable.

I have been under the truck and checked the cat heat shields, exhaust heat shields, and motor mounts.

Is there anything else I should be looking for?

Postby **disallow** » Wed Apr 17, 2013 1:15 pm

u-joints

GoldenPath · Postby **GoldenPath** » Wed Apr 17, 2013 1:22 pm

disallow wrote:u-joints

I thought that too, but it does it in drive and neutral as well. V6 by the way.

Postby **disallow** » Wed Apr 17, 2013 1:35 pm

GoldenPath · Postby **GoldenPath** » Wed Apr 17, 2013 5:35 pm

disallow wrote:4wd?

2wd

GoldenPath · Postby **GoldenPath** » Thu Apr 18, 2013 5:58 am

The crank pulley looks to have a little bit of a wobble to it. What could cause that?

deermjd · Postby **deermjd** » Thu Apr 18, 2013 10:56 am

The crank pulley could be loose. I had that problem after I had the secondary timing chain and guides replaced. The crank pulley bolt wasn't tightened to spec. Take a good look at the crank pulley itself. There's a chance the rubber that is between the inner and outer metal portions has deteriorated. This would cause the pulley to turn on itself and be out of balance.

GoldenPath · Postby **GoldenPath** » Thu Apr 18, 2013 11:05 am

deermjd wrote:The crank pulley could be loose. I had that problem after I had the secondary timing chain and guides replaced. The crank pulley bolt wasn't tightened to spec. Take a good look at the crank pulley itself. There's a chance the rubber that is between the inner and outer metal portions has deteriorated. This would cause the pulley to turn on itself and be out of balance.

Did yours coming loose display any signs? From what I can see, "spec" is 33 ft lb and then turn another 90 degrees. Is this right? Just doesn't sound like enough.

If the rubber has deteriorated, am I stuck with purchasing a new one?

deermjd · Postby **deermjd** » Thu Apr 18, 2013 11:09 am

Yes if the rubber is deterioted you'll need a new pulley.

GoldenPath · Postby **GoldenPath** » Thu Apr 18, 2013 11:24 am

deermjd wrote:Yes if the rubber is deterioted you'll need a new pulley.

How did you realize your crank pulley had come loose?

deermjd · Postby **deermjd** » Thu Apr 18, 2013 11:41 am

It caused a noticeable vibration.

GoldenPath · Postby **GoldenPath** » Thu Apr 18, 2013 11:52 am

deermjd wrote:It caused a noticeable vibration.

Thanks for your help. May be a while before I am able to check it, as I will be out of town this weekend (not driving the truck out of town), and will keep everyone updated.

Thanks

GoldenPath · Postby **GoldenPath** » Fri Apr 19, 2013 7:42 am

Thanks for all of the help, I had to try and take a look yesterday as it was about to bug me to death. Finally found it, an odd bolt on the AC Compressor (not related to mounting it) had come loose. Not sure why or how, but the vibe is gone.

GoldenPath · Postby **GoldenPath** » Fri Apr 26, 2013 5:04 pm

Well I don't hardly ever use the AC. Turned it on and took the wife to the store, and now I have a vibration at around 1000 rpm. It isn't there with the AC off. Can't win for lose. Will have to get under there Sunday. Any suggestions?

Strange vibe?

Strange vibe?

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