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...
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.
500 Jackson Street
Columbl~sI,N 47201 LISA
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
Steven R. Butler
Director - Product Safety
Fax: 8 12-377-3265
E-mail : steven.r. email@example.com
OEM No. of Engines
Country Coach 94
Freightliner Custom Chassis 666
Western RV 58
Cummins Distributors 15