Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN







Pontiac Montana-Vibration heard only inside car when stopped


  Email This Post



JonL
New User

Nov 10, 2011, 7:32 PM

Post #1 of 4 (1469 views)
Shortcut
Pontiac Montana-Vibration heard only inside car when stopped Sign In

2003 Pontiac Montana;3.4 liter;160,000 miles> low pitch vibration/humming noise heard in car cabin while in park or stopped at intersection. Cannot hear sound outside of car. Sound dissipates as car speed is increased. Sound is not related to increase in engine RPM. Engine does not miss or hesitate, engine smooth through increase in RPM.
engine does not appear to be running rough at idle. Checked exhaust system for source of vibration, nothing found.
Cannot really feel vibration, but you hear that type of sound.
Intermitant smell of coolant inside car started about the same time.
Some dash lights are out> Left side of speedometer and the stereo lights went out after start of humming sound.
Timing of problem-The car had sat idling for 20 minutes in heat of day to keep AC running about a week prior to problem start, but engine temperature gauge never showed elevated temp.
Transmission has started to slip on lower gear shifts when cold, about 2 months prior to this vibration issue.
Does this sound like some type of failure in engine or transmission dampening; or a vibration translated through HVAC system/firewall into cabin/dash? Can't a find a prior history of this system for Pontiac Montana's online.
Would like suggestions for trouble shooting to find source? Sound is getting on my my wife's nerves, need to solve.


Tom Greenleaf
Ultimate Carjunky / Moderator


Nov 10, 2011, 9:39 PM

Post #2 of 4 (1446 views)
Shortcut
Re: Pontiac Montana-Vibration heard only inside car when stopped [In reply to] Sign In

My WAG (wild arse guess) is if this doesn't change with RPM with the smell of coolant I think it MIGHT (long shot) be in the HVAC system like perhaps the blower motor/squirrel cage. Odor of coolant? Hope you don't need a core as most are no freaking fun. Any change with blower speed?

Back: 20 min with A/C on shouldn't be a problem. Think of the cabs, limos, livery cars, and tons more that wait that long or longer.

That's about all I can think of not RPM related or affected much by engine speed,

T
_________________________________________
Long retired now


JonL
New User

Nov 11, 2011, 12:38 AM

Post #3 of 4 (1431 views)
Shortcut
Re: Pontiac Montana-Vibration heard only inside car when stopped [In reply to] Sign In

Thanks, I'll look at HVAC first.


Tom Greenleaf
Ultimate Carjunky / Moderator


Nov 11, 2011, 5:50 AM

Post #4 of 4 (1427 views)
Shortcut
Re: Pontiac Montana-Vibration heard only inside car when stopped [In reply to] Sign In

Blower and cage first. Perhaps rodent issues and off balance? Might feel it by hand on body of blower motor if so?

T
_________________________________________
Long retired now




Pontiac Montana-Vibration heard only inside car when stopped


  Email This Post
 
 






Latest Forum Post
Hi My VW Jetta 3 1998 model (227 000 km on the clock) is making a clacking noi...
I JUST GOT A CHEVY SILVERADO 2500 VORTEC ENGINE SIZE 3500 WHEN IM DRIVING AND PI...
YES I HAVE A 1999 MITUBUSHI GALLANT 2.4 L V6 I WAS DRIVING AND IT JUST STARTED S...
i just bought it, it hadnt been started for about a year but ran fine when i sta...
Hello, I have a great looking 1985 s10 pickup 4.3 carburated with 80,000 miles....
2000 Nissan Maxima. Yesterday, the engine temp started shooting up quickly upon...

Feed Button


Used Car Search
Used Car Price Ranges:
Under $5,000
$20,000
$35,000

$10,000
$25,000
$40,000
$15,000
$30,000
$45,000
Over $45,000
Search used Cars By Manufacturers:
Used Acura
Used Audi
Used BMW
Used Buick
Used Cadillac
Used Chevrolet
Used Chrysler
Used Dodge
Used FIAT
Used Ford
Used GMC

Used Honda
Used Hyundai
Used Infiniti
Used Jaguar
Used Jeep
Used Kia
Used Land Rover
Used Lexus
Used Lincoln
Used Mazda
Used Mercedes-Benz

Used MINI
Used Mitsubishi
Used Nissan
Used Porsche
Used Saab
Used Scion
Used Subaru
Used Suzuki
Used Toyota
Used Volkswagon
Used Volvo
2010 Honda Civic
$15,770
2004 Jeep
$8,991
2012 Mustang
$22,990
1997 Honda Cr-V
$4,490
2010 Toyota Prius
$17,496
2010 BMW 328
$26,980




Automotive Forum Categories
Automotive Repair
Auto Body Repair and Refinishing
AC Auto Repair Help Forum
Automotive Wiring and Electrical

Auto Insurance and Car Financing
Automotive World
Brake Systems
Car Stereo Repair Advice
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair

Steering and Suspension
Tricks of the Trade
General Discussions
Car Shows and Events
The Bargin Bin
Motor Vehicle Inspection
Car Care Tips
Traffic Ticket Help
Car Racing

Gasoline, Motor Oils, Concept Cars
Remote Control Cars and Vehicles
Truck Repair
Truck Repair Advice


Truck Engine Repair
Truck Suspension Repair
Motorcycle Repair
Motorcycle and ATV Repairs

Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Seat Repair
Car Forum Posts - Sitemap


Search for (options) Privacy