Replaced water pump and fan clutch.
Oct 6, 2019 at 1:07 PM
When accelerating it sounds like an airplane taking off
1996 CHEVROLET ASTRO
JEFFREY ALAN JAMES
- MEMBER
- 6 POSTS
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KASEKENNY
- ✓ASE Certified Mechanic
- 18,907 POSTS
Hi,
This is normally the fan itself and not necessarily a bearing. Normally, it is because the clutch has failed and it locks the fan in "high" and it roars at slower speeds.
If this is replaced and it still does it, then we need to turn to a bearing. Does the noise happen when in Neutral and reving the engine or do you have to be moving?
If none of these items in this guide sound close then maybe getting a recording of the noise is the best bet.
https://www.2carpros.com/articles/whirring-sound
This is normally the fan itself and not necessarily a bearing. Normally, it is because the clutch has failed and it locks the fan in "high" and it roars at slower speeds.
If this is replaced and it still does it, then we need to turn to a bearing. Does the noise happen when in Neutral and reving the engine or do you have to be moving?
If none of these items in this guide sound close then maybe getting a recording of the noise is the best bet.
https://www.2carpros.com/articles/whirring-sound
Oct 6, 2019 at 5:39 PM
Only when moving.
Oct 7, 2019 at 12:59 AM
KASEKENNY
- ✓ASE Certified Mechanic
- 18,907 POSTS
Have you checked the fan blades for cracked blades? The increased air flow will make the noise louder. I am wondering if the fan itself is the issue.
Oct 7, 2019 at 7:03 PM
It revs up real high every time I accelerate. Not when idling only when moving.
Oct 18, 2019 at 2:31 PM
KASEKENNY
- ✓ASE Certified Mechanic
- 18,907 POSTS
Is it loud enough to get a recording of it? Maybe hearing it will get us on the same page. Thanks
Oct 18, 2019 at 5:24 PM
STRAILER
- ✓ASE Certified Mechanic
- 54,837 POSTS
Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response.
Oct 19, 2019 at 10:46 AM
It's leaking now from same area like new water pump is leaking.
Oct 21, 2019 at 7:53 PM
STRAILER
- ✓ASE Certified Mechanic
- 54,837 POSTS
Is the water pump making the noise? Try to move the clutch fan by hand to check the "free wheel" part. It should move but with resistance.
Oct 22, 2019 at 11:32 AM
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