Engine and engine cooling: engine (Mack)
Vehicle recall 79V-133. NHTSA received MACK TRUCKS, INCORPORATED’s report on May 31, 1979.
Watch and the shortlist are kept with a free account, on every device. Your watch list. NHTSA’s own record is on nhtsa.gov.
The short answer
NHTSA received MACK TRUCKS, INCORPORATED’s report on May 31, 1979. Copied from NHTSA on Oct 26, 2026.
Every line below is in NHTSA’s own words, with its source beside it.
What’s wrong with it?
The notice gives no hazard in a field of its own.
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.
NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.
- NHTSA’s part: Engine and engine cooling: engine.
What should you do?
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.
NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.
- How to reach the firm: 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.
- Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.
Which ones are recalled?
NHTSA counts 23,000 vehicles potentially involved, across everything this recall names.
NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.
- Mack MCand 1977, 1978 and 1979, before the model years listed here
- Mack WSand 1977, 1978 and 1979, before the model years listed here
- Mack WLand 1977, 1978 and 1979, before the model years listed here
- Mack DMand 1977, 1978 and 1979, before the model years listed here
- Mack Fand 1977, 1978 and 1979, before the model years listed here
- Mack RLand 1977, 1978 and 1979, before the model years listed here
- Mack MRand 1977, 1978 and 1979, before the model years listed here
- Mack RSand 1977, 1978 and 1979, before the model years listed here
- Mack RWSand 1977, 1978 and 1979, before the model years listed here
- Mack Rand 1977, 1978 and 1979, before the model years listed here
- Mack RDand 1977, 1978 and 1979, before the model years listed here
- Mack Uand 1977, 1978 and 1979, before the model years listed here
- Mack RWLand 1978 and 1979, before the model years listed here
- Mack RMand 1977, 1978 and 1979, before the model years listed here
- Mack DMMand 1977, 1978 and 1979, before the model years listed here
Who is recalling it?
- Made by MACK TRUCKS, INCORPORATED.
NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.
What the record doesn’t say
- NHTSA’s recall file doesn’t say whether anyone was hurt.
- Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
- This recall names only model years before 2015, which have no pages here. Your VIN, at NHTSA, says which recalls are open on a vehicle.
- How many have been returned or fixed isn’t in the notice.
Hearth Record wrote these lines.
Sources
-
National Highway Traffic Safety Administration, Recalls flat file before 2010 (FLAT_RCL_PRE_2010).
Released Oct 26, 2026 and checked Oct 26, 2026. Updated daily. Public domain (U.S. Government work).
Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 26, 2026.