Mack DM, DMM, F, MC and 11 more (1977-1979): Engine and engine cooling
Recall 79V133000 · May 31, 1979 · Mack Trucks, Incorporated
23,000
vehicles affected
23,000
vehicles affected
Facts
- Recall number
- 79V133000
- Date
- May 31, 1979
- Maker
- Mack Trucks, Incorporated
- Units affected
- 23,000
- Kind
- Vehicles
- Component
- Engine and engine cooling > Engine
- Model years
- 1977-1979
- Started by
- The safety regulator
- Hazard
- Injury
What is wrong
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
Recall repairs are free of charge.
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.
Vehicles covered
15 models, 44 model years in all
Related pages
Questions and answers
Which vehicles are in recall 79V133000?
15 models: Mack DM (1977-1979), Mack DMM (1977-1979), Mack F (1977-1979) and 12 more, about 23,000 vehicles in all.
What is the fix for recall 79V133000?
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.
A recall means the maker found a safety problem and offers a free fix; it does not mean every unit has the problem. Units affected are as reported by the company. Popular models sell more and so have more recalls and complaints. Official public data; texts are shortened. A dealer can tell whether a single vehicle still needs the repair.