2002 Nissan Frontier Engine is louder/hissing-whirring nois

2002 NISSAN FRONTIER
136,000 MILES • 6 CYL • 4WD • MANUAL
Avatar
TINFISH73
  • MEMBER
  • 1 POST
I unfortunately had the circumstance present itself where I had to drive through a creek (sbout 2-3 feet deep) for a few moments, and then drive about an hour at highwayspeeds home. The next time I started the car, or at least when I first noticed it, the engine sounded louder, a sort of hissing/whirring in the backgroud, but does not seem transmission related (happens at all rpms, clutch in or out.) No loss of performance. Upon inspection, I did see I was missing the light plastic guard under the engine, but saw no indications of damage. I changed the oil, but it made no difference. It's not like a thumping noise, but a constant sound, sort of like when you turn the wheel on an older car while its not moving, and hear the whirring hiss of the power steering. Help?
Jul 3, 2009 at 2:37 PM
Advertisement
Avatar
BUDDYCRAIGG
  • ASE Certified Mechanic
  • 2,262 POSTS
  • ASE Certified Mechanic
my first thought is that it's the bearings in an idler pulley got rusty.

take the drive belt off and then start your engine.

if the noise is gone, then we know it's one of the things the belt drives, e.g., alternator, tensioner.

or maybe it has nothing to do with driving through the water, and something else is failing.
Jul 3, 2009 at 8:55 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.