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BMC (Bluebird Motor Coach Unique Issues) If you have a unique issue with your BMC coach and it can't be answered in one of the other forums here, then this is where you can list it.....List your BMC Parts here too.

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  #11  
Old 4 Days Ago
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by LeRoy View Post
Randy since you have checked a couple what is involved in checking it out? I like peace of mind.

I think on your coach the compressor bolts came loose,even though we did talk about the KDP.


I have never seen the KDP on an 8.3,not saying it can't happen.
But,theres lots of history of it on the 5.9.


To check it out you have to remove the belts and then the balancer and then the front timing cover plate,i bet theres a youtube...


https://www.youtube.com/watch?v=ugHQ-S0sERU
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  #12  
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I just did a quick search and nobody has heard of the KDP problem in an 8.3.
I stole this post from another site.


As per Cummins Tech info, the "C" Series does not have the same issue as the "B" Series for the pin to drop out and cause issues.
Hope this helps someone.



Several other sites i looked at quickly say the same thing.
I found no recorded cases of the KDP on an 8.3.


But,feel free to prove me wrong!!
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  #13  
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LeRoy LeRoy is offline
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Personally I hope to never prove you wrong. More importantly I need to figure out the location of the compressor bolts and check on them. Hasn’t anyone tried using torque stripe on these after making sure they are tight? Then you would just need a visual inspection.
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  #14  
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LeRoy LeRoy is offline
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Guys I think this is the thread describing the compressor bolt issue. Can someone confirm that?

On second thought I think that the potential oil leak would be by the compressor mounting bolts loosening up and not the accessory drive support coming loose.
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Last edited by LeRoy; 4 Days Ago at 09:20 PM.
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LeRoy,
Here is one of the pix in that thread;

^ ^ ^
# 1 #2 #3


The first ^ arrow is the studs with the nuts that backed off my 8.3
The next ^ arrow is the compressor and the last arrow ^ is the hydraulic pump for the fan and power steering... Just make sure the nuts that hold the compressor to the timing gears are tight... Also make sure you have bolts in the middle mount support, between the compressor and hyd. pump...
HTH








Quote:
Originally Posted by LeRoy View Post
Guys I think this is the thread describing the compressor bolt issue. Can someone confirm that?

On second thought I think that the potential oil leak would be by the compressor mounting bolts loosening up and not the accessory drive support coming loose.
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  #16  
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LeRoy LeRoy is offline
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Will do thanks.
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Quote:
Originally Posted by Randy Dupree View Post
I just did a quick search and nobody has heard of the KDP problem in an 8.3.
I stole this post from another site.

As per Cummins Tech info, the "C" Series does not have the same issue as the "B" Series for the pin to drop out and cause issues.
Hope this helps someone.

Several other sites i looked at quickly say the same thing.
I found no recorded cases of the KDP on an 8.3.

But,feel free to prove me wrong!!
Yep, When I checked into KDP on the C8.3 I first inquired at Cummins West here in Fresno CA. They had never heard of a KDP on the C8.3 engine. I continued my research and I discovered that my C8.3 had a different front gearcase than the B model 5.9 engine. Could be wrong but that is what I found.
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