Engine & cooling

Mack DMM Engine problems by year

0 complaints filed with NHTSA about the Mack DMM's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.

Engine complaints by model year

0'72 '73 '74 '75 '76 '77 '78 '79 '80 '81 '82 '83 '84 '85 '86 '87 '88 '89 '90 '91 '92 '00 '01 '03

Year	Engine complaints	Crashes	Injuries	Recalls
1979	0	0	0	1
1978	0	0	0	1
1977	0	0	0	2
1976	0	0	0	1
1975	0	0	0	1
1974	0	0	0	1
1973	0	0	0	1
1972	0	0	0	1

Engine recalls

Engine

79V133000May 31, 197923,000 vehicles affected

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...

Covers1977 Mack DMM 1978 Mack DMM 1979 Mack DMM +41 more

Engine and engine cooling: fan

77V173000Oct 12, 197748,000 vehicles affected

The flex blade fans on the involved vehicles may develop cracks in the laminated stiffener as a result of fatigue during operation. If such a condition exists and the cracks go undetected, continued operation could cause pieces of the stiffener to break off.

Covers1972 Mack DMM 1973 Mack DMM 1974 Mack DMM 1975 Mack DMM 1976 Mack DMM 1977 Mack DMM +78 more

Latest DMM engine complaints

No complaints in this area yet.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data