Don, I think your thinking of the #53 (or was it 52?) block issue. The wrist pin problem was later:
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.
