ZR-1 Net Registry Forums - View Single Post - High Pitch Whine or Squeal at Start-Up

rosseich · 07-16-2024

1995 ZR1 with 10,000 miles - all original. I'm hearing a high pitch whine or squeal at start-up and first few minutes until the engine is warm. The idler pulley was rebuilt by Marc, and all the other pulleys and components are original. The belt is also new.

I have removed the belt and manually spun the water pump, alternator, power steering pump and AC compressor. All sound/seem normal. Since it is only noticeable when the engine is running at 2000+ RPMs, how can I identify the source of the issue?

I would appreciate your thoughts/advice.

Thanks.

07-16-2024	#1
rosseich Join Date: Dec 2023 Location: Minneapolis Posts: 15	High Pitch Whine or Squeal at Start-Up 1995 ZR1 with 10,000 miles - all original. I'm hearing a high pitch whine or squeal at start-up and first few minutes until the engine is warm. The idler pulley was rebuilt by Marc, and all the other pulleys and components are original. The belt is also new. I have removed the belt and manually spun the water pump, alternator, power steering pump and AC compressor. All sound/seem normal. Since it is only noticeable when the engine is running at 2000+ RPMs, how can I identify the source of the issue? I would appreciate your thoughts/advice. Thanks.