MACK R 1977: ENGINE AND ENGINE COOLING:ENGINE
NHTSA Campaign ID Number: 79V133000
| Make | Model | Year |
|---|---|---|
| MACK | R | 1977 |
| Date Owners Notified | Date Received by ODI | Date Added to Database |
| 1979-11-02 | 1979-05-31 | 1979-10-12 |
Production Dates: 1977-02-01 - 1979-03-01
Manufacturers Involved: Mack Trucks, Inc.
Component: ENGINE AND ENGINE COOLING:ENGINE
Potential Number Of Units Affected: 23000
Report Initiator: ODI ODI Report
IN THE EVENT OF TURBOCHARGER COMPRESSOR WHEEL FAILURE, ONE OR MORE OF THE FOUR CAPSCREWS THAT HOLD THE TURBOCHARGER TOGETHER MAY BE STRUCK BY PARTS OF THE COMPRESSOR WHEEL, RESULTING IN THE CAPSCREWS BEING DAMAGED. IF THESE CAPSCREWS ARE DAMAGED TO THE POINT THAT THEY ALLOW THE COMPRESSOR BACK PLATE TO DISLOCATE FROM THE TURBOCHARGER BEARING HOUSING, ENGINE LUBRICATING OIL MAY BE ALLOWED TO ESCAPE UNDER PRESSURE, CONTACTING THE ENGINE EXHAUST MANIFOLD SECTIONS OR TURBOCHARGER TURBINE HOUSING.
DEALER WILL INSTALL A SHIELD FOR THE HEADS OF THE FOUR CAPSCREWS, ALONG WITH STRONGER SAE 8 GRADE 8 CAPSCREWS, IF NECESSARY, AT NO COST TO OWNER.
VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH ENDT 'B' 676, ETAZ 'B' 673A, AND ETAY'B' 673A ENGINES.SYSTEM: ENGINE AND ENGINE COOLING.CONSEQUENCES OF DEFECT: ENGINE LUBRICATING OIL, IN THE PRESENCE OF A SOURCE OFIGNITION, COULD LEAD TO AN ENGINE COMPARTMENT FIRE AND SERIOUS INJURY TOVEHICLE PASSENGERS.
