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Old 01-27-2020, 05:39 PM   #11
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

Take the serp belt off (you can run for 30 seconds).
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Old 01-27-2020, 05:57 PM   #12
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

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Take the serp belt off (you can run for 30 seconds).
Yup 👍 thatís going to tell you a lot.
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Old 01-27-2020, 06:02 PM   #13
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

You can use a piece of pipe or tubing to put close to various parts and listen to determine exact location.
There is only so many things. Alternator, water pump, power steering, A/C, high pressure pump.
Alternator, you have a light for when it fails. Noise is not an issue except it will eventually fail.
Water Pump, it will leak water when it is bad enough to replace.
Power steering, turn the wheel while running and see if the sound gets worse.
A/C, does it get cold?
Hi pressure pump, are you leaking diesel fuel? This can/will come apart and start leaking at about 320,000 miles.
also various tensioners.
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Old 01-27-2020, 09:02 PM   #14
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

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Originally Posted by ECU View Post
You can use a piece of pipe or tubing to put close to various parts and listen to determine exact location.
There is only so many things. Alternator, water pump, power steering, A/C, high pressure pump.
Alternator, you have a light for when it fails. Noise is not an issue except it will eventually fail.
Water Pump, it will leak water when it is bad enough to replace.
Power steering, turn the wheel while running and see if the sound gets worse.
A/C, does it get cold?
Hi pressure pump, are you leaking diesel fuel? This can/will come apart and start leaking at about 320,000 miles.
also various tensioners.
Great idea! I will try to listen for the noise with a pipe! Nothing is leaking so far. Changed out water pump a while back.
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Old 01-28-2020, 02:59 AM   #15
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

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Great idea! I will try to listen for the noise with a pipe!
thank the Tappet Brothers for that one.
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Old 01-30-2020, 09:19 PM   #16
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

I drove about 500 miles on a blown harmonic balancer before replacing it. 300 of which were before I realized it was the source of the idling rumbles I had been hearing. In my situation, the weighted outer ring had come apart from the inner pulley. I could ring the two together like a bell by hand, but couldn't easily pull the outer ring from the inner ring. Once I realized what it was, I de-tensioned the belt, whacked the outer ring off of the pulley, re-installed the belt, ordered a new harmonic balancer, the flywheel lock tool, the new bolt and washer, and kept driving it until it all came in the mail.

The rumble you hear may be the crank resonating at idle. When you apply more throttle than idle, the engine vibrates at a frequency higher than the resonant frequency of the crank and the harmonic balancer isn't needed. The harmonic balancer changes the resonant frequency of the crank shaft so that its far enough away from the idle vibrations, and wont resonate at idle.

Avoid idle speed and get that sucker home.
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Old Yesterday, 04:13 AM   #17
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

I finally replaced harmonic balancer today and the sound is gone! Harmonic balancer looked ok to me but it is original with 200k miles. I couldn't turn 90 degrees after 240lb torque and maybe I turned about 10-20 degrees only because flywheel lock tool kept poping out. Is this something I should be concerned about?
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Old Yesterday, 03:15 PM   #18
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

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Originally Posted by socalmbcruiser View Post
I finally replaced harmonic balancer today and the sound is gone! Harmonic balancer looked ok to me but it is original with 200k miles. I couldn't turn 90 degrees after 240lb torque and maybe I turned about 10-20 degrees only because flywheel lock tool kept poping out. Is this something I should be concerned about?
I would be. There have been numerous reports of crankshaft end damage when HB bolts fail or loosen.

Did the holding tool jumping cause you to lose the index for the additional turn? If yes, I would start over with a new bolt.

I wouldn't hesitate to drive it for an interim period until you can effect repairs. I have no data to support that comment.

vic
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Old Today, 06:51 AM   #19
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

When the holding tool popped, I re-inserted the tool and checked the torque to be 240lb and I tried to turn 90 degrees but it was extremely hard to turn. I think I turned about 10 degrees from 240lb when it popped again. Just wondering if other people did turn 90 degrees, and how did you do it?
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Old Today, 11:48 AM   #20
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Default Re: Can I still drive 400 miles with noisy harmonic balancer?

I turned it using the tool. It popped out, but it popped out at about the 85-90 degree point, so I got lucky. The bolt is stretching, so your torque really isn't going to go up for you to measure. Maybe put some torque stripe on it and make it a regular check for movement.
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