Engine sounding a bit loud. - Nissan Murano Forum
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#1 Old 11-04-2007, 06:48 PM
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Engine sounding a bit loud.

OK, this sounds strange, I don't have strange clanks or anything like that but the MO is no longer purring like a quiet kitten at idle.
Hard to describe but it's sounding a bit trucky.

I maintain everything and change oil right on schedule but it just seems louder at idle than in the past. It does not seem to run rough as in clogged fuel injectors. I only use quality high test gasoline.

How about others in the 50K mile range, notice it seems louder or as I called it more trucky in sound?

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#2 Old 11-04-2007, 07:13 PM
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Bob,

I have 91,000 miles. Engine sounds better than ever....no strange noises...very quiet. Performance wise - fantastic! Fuel economy - better than ever. Have been using Mobil1 since 2nd oil change...

Are you sure you are not imagining things?

had: 03 MO SL, Gold, 2WD, Premium, leather, sunroof, Mobil 1, B-Quiet, Garmin Nuvi 250W, Fumoto oil valve, HIR's in fogs
08 CTS 304 HP Direct Injection Engine. Fully loaded with every option except AWD
04 FX35, AWD, Touring loaded, Garmin Nuvi 3590LMT, Fumoto oil valve
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#3 Old 11-04-2007, 07:21 PM
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bob1-

When you say louder, do you mean a louder exhaust sound or a louder mechanical sound?

-njjoe

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#4 Old 11-04-2007, 07:54 PM
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Quote:
Originally posted by njjoe
bob1-

When you say louder, do you mean a louder exhaust sound or a louder mechanical sound?

-njjoe
Louder mechanical sound. I asked a tech at Nissan about it. I said it sounds like lifters making some click click sounds.

He said that was a normal fuel injector firing. I asked if it was worn out or anything? He said no, he's never replaced one on the Murano. He did on another model at 100K miles. I never noticed any clicking before.

Seems when newer, I never could even hear the engine when running at idle.

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#5 Old 11-04-2007, 08:03 PM
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bob1-

The "click" sound is nothing to worry about. That is the normal sound of the solenoid being energized in each fuel injector.

-njjoe

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#6 Old 11-04-2007, 09:35 PM
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It could also be a product of rubber engine mounts that are not as pliable as they were when new, thus absorbing less vibration from the engine. But yeah nothing to worry about.

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#7 Old 11-04-2007, 10:10 PM
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Quote:
Originally posted by Eric L.
It could also be a product of rubber engine mounts that are not as pliable as they were when new, thus absorbing less vibration from the engine. But yeah nothing to worry about.
I think that really sounds like what I have going on. More vibration, a little louder than before.

Thanks everyone for the feedback.

Bob1

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#8 Old 11-29-2007, 10:33 PM
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Good news/bad news.

Got to the point where the MO at idle in gear started to sound like a 1974 used Chevy Pick-up with 330,000 miles.

I did not know what to think. You could not hear much under the hood but in the cabin with doors closed it sounded like an old worn out engine. It sounded like a Benz diesel from the early 70's.

Finally when I could isolate the noise as being in the cabin, I went to Nissan where a very good tech came out, listened and then brought out a stethoscope rod thing-a-ma-jig.

He had me listen to the Fuel Damper which sits in the back near the firewall. Clank, clank, clank I heard very loudly.

I said Bingo! So that was the good news.

Bad news is that stupid tin can on a hose assembly cost 180 bucks. Sheesh! Nissan charged 180 labor..double sheesh!

OK 360 bucks and I had a Nissan coupon where you spend so many dollars and get and get so much off. So they took 35 bucks off with the service coupon that I got in the mail.

Anyway, the Mo is purring like a kitten and as quiet as the day she was born.

The service advisor said there was a bulletin but I could not find one.

If anyone finds a TSB for the Fuel Damper Assembly, please post it.

Anyone else experiencing the Mo sounding like an old junk yard truck, have the tech listen to this fuel Damper device.

Bob1

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#9 Old 11-29-2007, 10:50 PM
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Quote:
Originally posted by bob1
Finally when I could isolate the noise as being in the cabin, I went to Nissan where a very good tech came out, listened and then brought out a stethoscope rod thing-a-ma-jig.

He had me listen to the Fuel Damper which sits in the back near the firewall. Clank, clank, clank I heard very loudly.
bob1-

Kudos to your dealer for employing a technician who knows something about hands-on troubleshooting. That seems to be a lost art at many Nissan dealerships. He probably saved you a lot of money and aggravation.

Unfortunately the accounting department does not share the technician's dedication to customer support. The list price for the rear damper is only $118 (you can buy it online for $84). I guess the extra $62 was to cover their stocking and handling costs.

-njjoe

2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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#10 Old 11-30-2007, 07:49 AM
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Bob

Good to hear your car is fixed. Pity they got you on $$$…

Anyway, the mechanic must have not have Nissan Certification. He was just too good.

Using a stethoscope? Wow! I just cannot see a Nissan Certified Technician do it. It is too low tech. You know computer tells you everything.

Oh, and he did not ask about the lack of error code? Unusual....

had: 03 MO SL, Gold, 2WD, Premium, leather, sunroof, Mobil 1, B-Quiet, Garmin Nuvi 250W, Fumoto oil valve, HIR's in fogs
08 CTS 304 HP Direct Injection Engine. Fully loaded with every option except AWD
04 FX35, AWD, Touring loaded, Garmin Nuvi 3590LMT, Fumoto oil valve
Dream car: Ferrari Italia
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#11 Old 11-30-2007, 07:57 AM
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Quote:
Originally posted by njjoe

bob1-

Kudos to your dealer for employing a technician who knows something about hands-on troubleshooting. That seems to be a lost art at many Nissan dealerships. He probably saved you a lot of money and aggravation.

Unfortunately the accounting department does not share the technician's dedication to customer support. The list price for the rear damper is only $118 (you can buy it online for $84). I guess the extra $62 was to cover their stocking and handling costs.

-njjoe
Yeah Joe, I only use this tech and the dealer allows me to request him.

When my car was new I complained and went back to the dealer 3 times concerning tire wear. I got this tech named Randy that said a strut was bent probably upon delivery and the car can't be aligned without a replacement. He replaced it under warranty and then since my tires were shot at 20 something thousand miles, I convinced Nissan corp to bite the bullet on new tires since they delivered a faulty car.

Anyway the tech I mentioned above was the only guy on 3 trips that found the strut. Since then, I only use him.

I'm still feeling a bit ripped off from the cost of this item and I know the part was not in stock and they had to have it sent in.

Maybe my experience will help someone else. The Mo was sounding so bad that thoughts of a trade and conversation arose from it.

It is so quiet now and in the long run worth the money to be once again purring like a kitty.

Bob1

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#12 Old 11-30-2007, 10:13 AM
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We've had several cases of bad fuel dampers here. Need to keep an eye (ear?) out for this in the future. Usually a sound like.......well, that won't help, most of you have never heard of the sound steam radiators make..........


Anyway, good deal. And that mechanic is the most valuable accessory you have right now.......

Homer

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#13 Old 11-30-2007, 10:55 AM
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Originally posted by hfelknor
We've had several cases of bad fuel dampers here. Need to keep an eye (ear?) out for this in the future. Usually a sound like.......well, that won't help, most of you have never heard of the sound steam radiators make..........Homer
Homer, best I can come up with for a sound will be like that of an old truck with worn valves clacking away. It just sounds like a diesel or a car ready for a rebuild on the engine.

The other piece of advice would be to listen, in gear, dead stop on a warm engine. Even at normal idle in Park it was hard to hear. When you'd pull up to a red light or something after the engine was warm. OMG, there is no mistaking that something is wrong under the hood.

Sound heard distinctly at low idle from INSIDE the cabin since this fuel damper sits back towards the fire wall. You can see this by looking on the driver side of the fire wall, not all the way back but pretty far. It has a gold or copper colored metal barrel that is only about 1.5 inches long. It's not very big and has a fuel line attached that disappears to the firewall.

I hope this helps someone.

Bob1

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#14 Old 11-30-2007, 11:13 AM
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Just remember there is another damper on the other side of the engine too........

Homer

2005 Mercury Grand Marquis
2004 ThunderBird 2 passenger Runabout


HAD The GOLD RUSH until Nov 6 2009
2003 Gold SLFWD with Premium, Sunroof, Latte Leather, Ultrashield Invisible Bra, Sunroof wind deflector, Aluminum Tank Guard, Chrome Wheels by Ion Alloy, Michelin 235/65-18 Cross Terrains, Garmin Nuvi

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#15 Old 11-30-2007, 11:18 AM
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The following is from the Service Manual.

-njjoe
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2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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