“Clacking” on Throttle

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Jan 10, 2026 | 08:30 AM

defdes

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From: Vermont

“Clacking” on Throttle

I’d been noticing more engine noise than I’m accustomed to, I replaced my shifter boot, which helped a bit and I thought the noise was engine noise from my leaking up pipes. I replaced those with bellowed and the noise is still there. All under hood hoses have been replaced and are tight. Perhaps I’m nuts and just realizing how loud these trucks are, but have a listen and tell me what you hear:

Jan 10, 2026 | 06:58 PM

97-psd

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From: knoxville, tn

Hard to tell on a phone but low fuel pressure can make it louder as well. Might check it to make sure.

Jan 10, 2026 | 08:47 PM

defdes

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Tuned

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From: Vermont

Quote:

Originally Posted by 97-psd

Hard to tell on a phone but low fuel pressure can make it louder as well. Might check it to make sure.

Point taken. Maybe I’m starting to get a restriction from the tanks (dread). I was in replacing up and down pipes and noticed the fuel pump leaking so just replaced it with an OEM lifter pump. Noise was the same as before all of the work.

Jan 12, 2026 | 09:34 AM

knottyrope

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From: Bahstun

almost sounds like when my HB went out
Do you have any run out on yours?
Whats you belt look like?

Jan 12, 2026 | 05:37 PM

defdes

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From: Vermont

Quote:

Originally Posted by knottyrope

almost sounds like when my HB went out
Do you have any run out on yours?
Whats you belt look like?

Pulley is tight, Belt is beginning to show wear on engine side but has been on there for a few years. Before I changed to OEM tensioner/guide wheel I was going through belts at an alarming rate .

Jan 13, 2026 | 08:52 AM

knottyrope

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From: Bahstun

That sounds like HB is worn, with it running, go under and put a piece of this wood next to the pulley and see if it wobbles at all.

Jan 13, 2026 | 10:50 AM

defdes

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Tuned

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From: Vermont

Quote:

Originally Posted by knottyrope

That sounds like HB is worn, with it running, go under and put a piece of this wood next to the pulley and see if it wobbles at all.

You said “HB” and I went straight to “HydroBoost” and its pulley. You are correct, by balancer is a bit out and I have a new OEM replacement ready to go on this weekend along with the LVLP Mehling upgrade. I’ll update when the job is done. Does the fan clutch have to be removed for both of those?

Last edited by defdes; Jan 13, 2026 at 11:14 AM.

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Jan 13, 2026 | 05:57 PM

defdes

Thread Starter

Tuned

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From: Vermont

Quote:

Originally Posted by Hit Man X

Yes, pull the fan. I have data about me doing the Fluidamper swap with the Melling in my thread

Where did you procure the balancer?

Thanks… I hate renting tools.
I THINK I got it from RiffRaff, I’ve ordered from all over over the last month, but 80% of the parts came from them.

Jan 14, 2026 | 12:26 PM

#10

Hit Man X

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From: North Texas

I purchased a larger Gearwrench brand fan clutch kit, tired of renting also. I also own their serpent belt tool set

Jan 14, 2026 | 05:07 PM

#11

defdes

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Tuned

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From: Vermont

Quote:

Originally Posted by Hit Man X

I purchased a larger Gearwrench brand fan clutch kit, tired of renting also. I also own their serpent belt tool set

Today I noticed a large bicycle headset wrench welded to a piece of flat stock in my shop, I think I must have made that when I had the fan off last time. Anyway , what does that Gearwrench serpentine belt kit allow you to do that you can’t do with a 1/2” breaker bar?

Last edited by defdes; Jan 14, 2026 at 05:08 PM.

Jan 17, 2026 | 07:06 PM

#12

defdes

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Tuned

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From: Vermont

All done with the new balancer and LPOP and that did it. So much more pleasant to drive now, smooth and quiet, well 7.3 quiet anyway.

Jan 22, 2026 | 11:24 AM

#13

97-psd

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From: knoxville, tn

Glad it worked for you. Got another video so we can hear the difference?

Jan 22, 2026 | 11:31 AM

#14

Hit Man X

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From: North Texas

https://www.gearwrench.com/all-tools...ch-service-set

That is what I picked up, works on many of my vehicles. Sure auto store ones free rental, still takes time to go there!

Good to hear you are back in business.