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Old 03-28-2020, 11:42 AM   #1
Mini-Skoolie
 
Join Date: Aug 2014
Posts: 12
Year: 1997
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9 cummins
Rated Cap: 72
Unhappy 97 12 valve 5.9 Cummins

It is always run great I drive it very little crank it up one day soon as you rev it up between 12 and 2000 RPMs you get a valve rattle noise never had it before any help would really be appreciated! And thanks. And I forgot to mention if you rev it up cold you get no noise at all sounds great only after it warms up a little bit! Please help!

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Old 03-28-2020, 12:04 PM   #2
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Join Date: Dec 2016
Location: Weeki Wachee, FL
Posts: 3,056
Year: 1997
Coachwork: Bluebird
Chassis: TC2000 FE
Engine: Cummins 5.9
Rated Cap: 72
Reality is these engines have some rattles that are normal, and it's hard to say if the ones you are hearing are the normal ones or not. Can you record a video of it maybe?
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Old 03-28-2020, 12:31 PM   #3
Bus Nut
 
Join Date: Jul 2016
Location: Western Oregon
Posts: 876
Year: 1995
Coachwork: Blue-Bird
Chassis: TC RE 3408
Engine: 5.9 Cummins 12V Mechanical/Allison MT643
Rated Cap: Blue-Bird says 72 pass.
Mine is also pretty noisy when it first starts. And it can sound a bit differently at times, but most of the noise doesn't last long. So far it has always gone away in a minute or two. Then it gets much quieter, but of course it has a much higher decibel level than my small block Ford.

Getting other peoples comments and opinions after hearing the sound would be a very good idea.
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Old 03-28-2020, 02:20 PM   #4
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Join Date: May 2016
Location: Eastern WA
Posts: 6,401
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
I have 24 valve 5.9 & 8.3 and the sound they make when started cold varies depending on temperature.
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Old 03-28-2020, 06:25 PM   #5
Mini-Skoolie
 
Join Date: Aug 2014
Posts: 12
Year: 1997
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9 cummins
Rated Cap: 72
As soon as you rev mine up from 1200 to 2000 Range every quick rev sounds like valve clattering if you hold it up there it just constantly rattles top of the engine and it just started doing it I've had it for about 5 years it's always sound great!
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Old 03-29-2020, 05:23 PM   #6
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Join Date: May 2014
Location: West Ohio
Posts: 3,697
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
6bt's have mechanical followers which require periodic lash check/adjustment.

I'd start there.
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Old 04-23-2020, 09:51 AM   #7
Mini-Skoolie
 
Join Date: Aug 2014
Posts: 12
Year: 1997
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9 cummins
Rated Cap: 72
Ok thanks!
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Old 04-27-2020, 07:32 AM   #8
Mini-Skoolie
 
Join Date: Aug 2014
Posts: 12
Year: 1997
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9 cummins
Rated Cap: 72
I wish somebody could tell me how to upload a video
To a previous post
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Old 04-27-2020, 07:57 AM   #9
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Join Date: Sep 2014
Location: Eustis FLORIDA
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Year: 1999
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Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by saftyliner1997 View Post
I wish somebody could tell me how to upload a video
To a previous post
psots can only be edited for 90 minutes. Keeps folks from shitposting then erasing it.
To upload a YT vid do this- copy the url of the video and just paste it right to the reply box without using the link or pic tools. It will automatically work once you submit the post.
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Old 05-13-2020, 10:59 AM   #10
Mini-Skoolie
 
Join Date: Aug 2014
Posts: 12
Year: 1997
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9 cummins
Rated Cap: 72
Well I found where my squealing and rattling noise was it's called bearings trying to spin out rebuild!
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Old 05-13-2020, 11:02 AM   #11
Mini-Skoolie
 
Join Date: Aug 2014
Posts: 12
Year: 1997
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9 cummins
Rated Cap: 72
Does anybody out there know what a good full rebuild kit for a 12 valve 5.9 Cummins is worth buying and keep enough to afford? If so please help
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