Recall 79V133000 — ENGINE AND ENGINE COOLING:ENGINE Defect in 1977-1979 MACK WS
RECALL This recall affects up to 23,000 vehicles.
Recall Summary
| NHTSA Campaign | 79V133000 |
| Manufacturer | MACK TRUCKS, INCORPORATED |
| Vehicles Affected | 23,000 |
| Component | ENGINE AND ENGINE COOLING:ENGINE |
| Date Notified | |
| Affected Vehicles |
1977 MACK WS, 1977 MACK MC, 1977 MACK WL, 1977 MACK DM, 1977 MACK F, 1977 MACK MR, 1977 MACK RS, 1977 MACK RL, 1977 MACK DMM, 1977 MACK RWS, 1977 MACK RM, 1977 MACK U, 1977 MACK R, 1977 MACK RD, 1978 MACK MC, 1978 MACK RL, 1978 MACK RWS, 1978 MACK DM, 1978 MACK RD, 1978 MACK RWL, 1978 MACK RM, 1978 MACK WS, 1978 MACK DMM, 1978 MACK F, 1978 MACK RS, 1978 MACK U, 1978 MACK WL, 1978 MACK MR, 1978 MACK R, 1979 MACK MC, 1979 MACK F, 1979 MACK WS, 1979 MACK R, 1979 MACK RD, 1979 MACK U, 1979 MACK RS, 1979 MACK RM, 1979 MACK WL, 1979 MACK DM, 1979 MACK DMM, 1979 MACK MR, 1979 MACK RWL, 1979 MACK RWS, 1979 MACK RL
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Defect Description
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.
Remedy
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.
Related Recalls for MACK
| Campaign | Vehicle | Component | Date | Affected |
|---|---|---|---|---|
| 25V666000 | 2024 MACK MD (ELECTRIC) | SEAT BELTS:FRONT:ANCHORAGE | 15,841 | |
| 25V801000 | 2025 MACK PIONEER PR (4) | EQUIPMENT:MECHANICAL | 46 | |
| 25V622000 | 2025 MACK PIONEER PR (4) | EXTERIOR LIGHTING:LIGHTING CONTROL MODULE | 156 | |
| 25V495000 | 2026 MACK GRANITE GR (4) | SERVICE BRAKES, AIR:DRUM | 36 | |
| 25V521000 | 2025 MACK ANTHEM (AN) | STEERING | 32 | |
| 25V427000 | 2024 MACK MD (ELECTRIC) | ELECTRICAL SYSTEM:SOFTWARE | 148 | |
| 25V352000 | 2026 MACK GRANITE GR (4) | SERVICE BRAKES, AIR:DRUM | 5 | |
| 25V382000 | 2025 MACK GRANITE (GR) | ELECTRICAL SYSTEM:12V/24V/48V BATTERY | 8 | |
| 25V333000 | 2026 MACK MD | SEAT BELTS | 42 | |
| 25V030000 | 2010 MACK MRU | SERVICE BRAKES, AIR:ANTILOCK | 142 |