Engine and engine cooling: engineRecall 79V-133 · Mack vehicles
MACK TRUCKS, INCORPORATED recall 79V-133 covers 23,000 Mack vehicles for a engine and engine cooling: engine problem, reported to NHTSA on May 31, 1979.
Source: NHTSA recall 79V133000 and manufacturer quarterly reports. Started by an NHTSA defect investigation.
The problem
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.
The fix
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from February 1, 1977 to March 1, 1979. Not every vehicle in these model years is included; check by VIN.
The investigation behind this recall
- TURBO CHARGER FAILURESNHTSA