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Old 06-18-2007, 06:13 PM   #1
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Posts: 44
I came across this on another forum regarding Cummins ISL engine failures. The following memo from the NHTSA states that 818 engines were supplied to Monaco. I just checked my '06 HR Endeavor ESN and it is within the recall. I'm contacting Cummins to find out just how "safe" these engines are to operate. A piston connecting rod freezing up could be very scarry! Has anyone had this failure with their ISL?

The NHTSA letter...


May 18,2007
Associate Administrator for Enforcement
National Highway Traffic Safety Administration
400 Seventh Street, S.W.
Washington, D.C. 20590
Dear Sir or Madam:
The following information is submitted in accordance with the National Highway
Traffic Safety Administration's reporting regulations, 49 CFR Part 5 73.6.
Cummins Inc. (Cummins) has decided that there is a potential safety-related defect with
respect to connecting rods in ISL CM850 diesel engines manufactured by Cummins and
installed as original equipment in those motor vehicles identified below.
1. Product identification and customer channels.
This defect involves Cummins ISL CMS5O diesel engines produced for recreational
vehicle applications between October 17,2005 and April 18, 2006. There are 2159
engines in the subject population that we intend to campaign.
All ISL CM850 engines in the subject population are covered by this recall. The ISL
CM850 recreational vehicle ESNs eligible for this campaign range from 46543077 to
46603939. A complete listing of the subject populations by vehicle manufacturer is
attached in Appendix A.
2. Identification of the item: Connecting Rod
Engine Make: Cummins
Model: ISL CM850
Part Number: 3971 393
Function: Transmit energy from the piston to the crankshaft
3. Estimated extent of defect population.
Cummins estimates that approximately 3 3% of the subject population of engines could
experience a connecting rod failure. Cummins will pursue a 100% recall on all engines
in the subject population.
Cummins notes that the Company has voluntarily decided to conduct this recall.
Cummins Inc.
500 Jackson Street
Columbl~sI,N 47201 LISA
Phone 18123775000
cummins.com
07E-033
(4 pages)
4. Description of defect.
The connecting rod contains a machining defect in the wrist pin bushing of the rod that
could cause a seizure of the piston pin, which if allowed to progress, can lead to engine
failure with the possibility of the rod rupturing the block cavity, oil and debris on the
roadway and vehicle crash.
5. Chronology of events.
Over the later months of 2006, Cummins received reports of ISL CM850 engine failures
of recreational vehicles in the field. The failures were occurring on ISL CM850 engines
built after October 1 7, 2005.
In response to these reports, Cummins Service Engineering and Cummins Product
Engineering investigated the failures and coordinated problem solving activities. On
May 11, 2007, these activities led to a management decision to conduct a safety
campaign on ISL CM850 recreational vehicle engines built between October 17,2005
and April 18,2006.
To date, Cummins is not aware of any injuries, fatalities, or crashes that were the result
of this defect. It is estimated that approximately 3.8% of the subject population could
experience an engine failure.
6. Remedy program.
Cummins will recalibrate the engine control module. Additionally, Cummins will
enhance the Engine Protection System enabling it to provide early detection of the
failure mode and avoid more serious engine damage and resultant safety hazard. This
will involve installation of a new valve cover with a crankcase pressure sensor. Prior to
failure, the new crankcase pressure sensor will provide a signal to the dash with a red
light. A red lamp gives an indication to the driver to stop the engine as soon as it can
safely be done The campaign will be completed without charge to engine owners.
Cummins notes and emphasizes that all covered vehicles involved in the campaign were
sold with a 5- year or 100,000 mile warranty and are estimated to have extensive
warranty coverage remaining on these engines to cover future repairs as needed.
7. Part 577 notice letter.
The customer notice letter is in the process of being prepared and will be submitted in
draft to the agency as soon as possible.
8. Conduct of recall campaign.
Subject to concurrence of its OEM customers, Cummins will be conducting the
respective recalls with the customers of each OEM.
9. Customer/owner notifications.
Notifications are expected to begin in July 2007, once Cummins is in receipt of the
OEM recall authorizations and customer lists.
Please advise the undersigned of the recall campaign number assigned by the Office of
Defects Investigation to this recall. Cummins campaign code for this recall will be
C0713.
Sincerely yours,
Steven R. Butler
Director - Product Safety
Phone: 812-377-3713
Fax: 8 12-377-3265
E-mail : steven.r. butler@cummins.com
Appendix A
OEM No. of Engines
Country Coach 94
Foretravel 9
Freightliner Custom Chassis 666
Monaco 818
Spartan 499
Western RV 58
Cummins Distributors 15
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Old 06-18-2007, 06:13 PM   #2
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Posts: 44
I came across this on another forum regarding Cummins ISL engine failures. The following memo from the NHTSA states that 818 engines were supplied to Monaco. I just checked my '06 HR Endeavor ESN and it is within the recall. I'm contacting Cummins to find out just how "safe" these engines are to operate. A piston connecting rod freezing up could be very scarry! Has anyone had this failure with their ISL?

The NHTSA letter...


May 18,2007
Associate Administrator for Enforcement
National Highway Traffic Safety Administration
400 Seventh Street, S.W.
Washington, D.C. 20590
Dear Sir or Madam:
The following information is submitted in accordance with the National Highway
Traffic Safety Administration's reporting regulations, 49 CFR Part 5 73.6.
Cummins Inc. (Cummins) has decided that there is a potential safety-related defect with
respect to connecting rods in ISL CM850 diesel engines manufactured by Cummins and
installed as original equipment in those motor vehicles identified below.
1. Product identification and customer channels.
This defect involves Cummins ISL CMS5O diesel engines produced for recreational
vehicle applications between October 17,2005 and April 18, 2006. There are 2159
engines in the subject population that we intend to campaign.
All ISL CM850 engines in the subject population are covered by this recall. The ISL
CM850 recreational vehicle ESNs eligible for this campaign range from 46543077 to
46603939. A complete listing of the subject populations by vehicle manufacturer is
attached in Appendix A.
2. Identification of the item: Connecting Rod
Engine Make: Cummins
Model: ISL CM850
Part Number: 3971 393
Function: Transmit energy from the piston to the crankshaft
3. Estimated extent of defect population.
Cummins estimates that approximately 3 3% of the subject population of engines could
experience a connecting rod failure. Cummins will pursue a 100% recall on all engines
in the subject population.
Cummins notes that the Company has voluntarily decided to conduct this recall.
Cummins Inc.
500 Jackson Street
Columbl~sI,N 47201 LISA
Phone 18123775000
cummins.com
07E-033
(4 pages)
4. Description of defect.
The connecting rod contains a machining defect in the wrist pin bushing of the rod that
could cause a seizure of the piston pin, which if allowed to progress, can lead to engine
failure with the possibility of the rod rupturing the block cavity, oil and debris on the
roadway and vehicle crash.
5. Chronology of events.
Over the later months of 2006, Cummins received reports of ISL CM850 engine failures
of recreational vehicles in the field. The failures were occurring on ISL CM850 engines
built after October 1 7, 2005.
In response to these reports, Cummins Service Engineering and Cummins Product
Engineering investigated the failures and coordinated problem solving activities. On
May 11, 2007, these activities led to a management decision to conduct a safety
campaign on ISL CM850 recreational vehicle engines built between October 17,2005
and April 18,2006.
To date, Cummins is not aware of any injuries, fatalities, or crashes that were the result
of this defect. It is estimated that approximately 3.8% of the subject population could
experience an engine failure.
6. Remedy program.
Cummins will recalibrate the engine control module. Additionally, Cummins will
enhance the Engine Protection System enabling it to provide early detection of the
failure mode and avoid more serious engine damage and resultant safety hazard. This
will involve installation of a new valve cover with a crankcase pressure sensor. Prior to
failure, the new crankcase pressure sensor will provide a signal to the dash with a red
light. A red lamp gives an indication to the driver to stop the engine as soon as it can
safely be done The campaign will be completed without charge to engine owners.
Cummins notes and emphasizes that all covered vehicles involved in the campaign were
sold with a 5- year or 100,000 mile warranty and are estimated to have extensive
warranty coverage remaining on these engines to cover future repairs as needed.
7. Part 577 notice letter.
The customer notice letter is in the process of being prepared and will be submitted in
draft to the agency as soon as possible.
8. Conduct of recall campaign.
Subject to concurrence of its OEM customers, Cummins will be conducting the
respective recalls with the customers of each OEM.
9. Customer/owner notifications.
Notifications are expected to begin in July 2007, once Cummins is in receipt of the
OEM recall authorizations and customer lists.
Please advise the undersigned of the recall campaign number assigned by the Office of
Defects Investigation to this recall. Cummins campaign code for this recall will be
C0713.
Sincerely yours,
Steven R. Butler
Director - Product Safety
Phone: 812-377-3713
Fax: 8 12-377-3265
E-mail : steven.r. butler@cummins.com
Appendix A
OEM No. of Engines
Country Coach 94
Foretravel 9
Freightliner Custom Chassis 666
Monaco 818
Spartan 499
Western RV 58
Cummins Distributors 15
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Old 06-21-2007, 09:42 AM   #3
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Posts: 2,046
Thanks for posting this brrving. I like the Cummins in my pickup and I think the company has always been super in responding to problems. However, their response to this one is suspect. Recalibrating the engine control module sounds to me like they're going to detune the injector pump to offset some weak connecting rods. I could be wrong.

I'm hoping a moderator links your post to the Winnebago IRV2 section as I've heard the span of serial numbers is wider than shown.
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Old 06-21-2007, 10:10 AM   #4
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While I certainly hope no one here experiences this problem I also feel a little relieved that we didn't buy either a 07 Diplomat or Scepter that we were recently looking at that has the ISL 400.
This problem seems to be something that could be catastrophic to the engine and I don't see why Cummins would jeopardize their reputation with such a weak fix.
My hope is Cummins will step up to the plate and make the repair to the connecting rod on each and every engine that has this problem.
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Old 06-28-2007, 03:55 PM   #5
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Posts: 54
I am trying to get my dealer off his rear end and find out if I am affected by it. Also, I have sent an email to Monaco with no reply as yet. No word yet and it's almost two weeks since we first saw the "recall" notice. Obviously with my 07 Endeavor, I might be right in the middle of the problem.
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Old 07-03-2007, 11:05 AM   #6
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Posts: 54
<span class="ev_code_BLUE">I'm a happy camper right now!!!</span> In addition to the Cummins recall, I ask HR Support if my Allison is one of the "new" ones that does not require the 5,000 mile filter change. Today, I received an email back from them:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">
Hi Wayne,
I looked up your engine serial number (46675155), and the website did not show your engine in the scope of this Cummins recall. As far as your transmission filter, you best bet is to call Allison at 1-800-524-2303. I can provide you with the transmission serial number though. It is 6510702920.
Thanks,
Dan
Hr Tech </div></BLOCKQUOTE>
He's referring to the Cummins web site. Also, I called the Allison number and my transmission is one of the new ones so I won't have to worry about the 5,000 mile filter change.
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