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Strange grinding noise

Tiny
JUSTIN ROBERT SULICH
  • MEMBER
  • 2004 SUBARU LEGACY
  • 2.5L
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 211,980 MILES
We believe the power steering pump, or rack on our car is going, however today I started to notice a strange occasional grinding sound. It at first appeared to be coming from inside the engine or engine compartment, however after standing outside the car it more appears to be coming from behind the engine bay and directly underneath the car. The car is not driving differently, however I am concerned by the noise.
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Wednesday, March 29th, 2017 AT 7:04 PM

5 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Is the noise constant with engine speed? Will it change with the car in park, drive or neutral?
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Thursday, March 30th, 2017 AT 1:41 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,452 POSTS
Does the sound change if you move the steering wheel L/R? Louder? Different pitch?
Fluid full?
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Thursday, March 30th, 2017 AT 2:38 AM
Tiny
JUSTIN ROBERT SULICH
  • MEMBER
  • 2 POSTS
Fluid is full, and the noise only briefly occurs when the car is going from low rpms to high rpms then stops. And yes there is also a noise when turning the steering wheel sometimes
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Thursday, March 30th, 2017 AT 6:20 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Hi Justin,

Can you take a video and post it to youtube and then send us the link, this really helps with noises.

Best, Ken
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Saturday, April 1st, 2017 AT 4:07 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,452 POSTS
Sounds like the pump itself. When you rev the engine it takes a couple seconds for the pump to build pressure. Same thing when you steer L/R.
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Sunday, April 2nd, 2017 AT 1:30 AM

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