- Vehicles
- 23,000
- Built between
- Feb 1977 – Mar 1979
- Models
- 15
- Recall type
- Vehicle
- Initiated by
- NHTSA investigation
- Owners notified
- 2 November 1979
- Repaired
- Not reported
- Unrepaired
- Not reported
Does this affect my vehicle?
This recall covers vehicles built between February 1977 and March 1979. If yours was built outside that window, it is not part of this recall.
- 1977-1979 Mack DMBuilt February 1977 to March 1979
- 1977-1979 Mack DMMBuilt February 1977 to March 1979
- 1977-1979 Mack FBuilt February 1977 to March 1979
- 1977-1979 Mack MCBuilt February 1977 to March 1979
- 1977-1979 Mack MRBuilt February 1977 to March 1979
- 1977-1979 Mack RBuilt February 1977 to March 1979
- 1977-1979 Mack RDBuilt February 1977 to March 1979
- 1977-1979 Mack RLBuilt February 1977 to March 1979
- 1977-1979 Mack RMBuilt February 1977 to March 1979
- 1977-1979 Mack RSBuilt February 1977 to March 1979
- 1978-1979 Mack RWLBuilt February 1977 to March 1979
- 1977-1979 Mack RWSBuilt February 1977 to March 1979
- 1977-1979 Mack UBuilt February 1977 to March 1979
- 1977-1979 Mack WLBuilt February 1977 to March 1979
- 1977-1979 Mack WSBuilt February 1977 to March 1979
What the defect is
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.
What gets fixed
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.
Timeline
- Vehicles builtFebruary 1977 to March 1979
- Recall reported to NHTSA31 May 1979
- Owners notified2 November 1979
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 31 May 1979.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Official source
- Recalling manufacturer
- MACK TRUCKS, INCORPORATED
- Recall initiated by
- ODI
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional notes
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 your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.