Recall 79V133000: 1977–1979 Mack DM and 2 other models

Report received

May 31, 1979

Manufacturer

Mack trucks, incorporated

Potentially affected

23,000vehicles

Model years

1977–1979

Check your own vehicle. A recall applies only to vehicles within the affected build range. Enter your VIN at nhtsa.gov/recalls. Recall repairs are free at a franchised dealer.

What NHTSA recorded

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.

Affected model years

Pages for each model year show complaints, parts, mileage and other recalls.

• 1977 Mack DM0 complaints
• 1978 Mack DM0 complaints
• 1979 Mack DM0 complaints
• 1977 Mack MR0 complaints
• 1978 Mack MR0 complaints
• 1979 Mack MR0 complaints
• 1977 Mack RD0 complaints
• 1978 Mack RD0 complaints
• 1979 Mack RD0 complaints