DETROIT DIESEL 53
14
SECTION 14
ENGINE TUNE-UP
CONTENTS
Engine Tune-Up Procedures................................ ................................ ................
Exhaust Valve Clearance Adjustment ................................ ................................ .
Timing Fuel Injector ................................ ................................ .............................
Variable Speed Mechanical Governor and Injector Rack Control Adjustment:
(V-Type Engine)................................ ................................ ...........................
Supplementary Governing Device Adjustment:
Throttle Delay Mechanism ................................ ................................ ..........
ENGINE TUNE-UP PROCEDURES
There is no scheduled interval for performing an engine
tuneup.
As long as the engine performance is
2.
Variable speed mechanical.
satisfactory, no tuneup should be needed.
Minor
adjustments in the valve and injector operating
The mechanical governors are identified by a name
mechanisms. governor, etc. should only be required
plate attached to the governor housing.
periodically to compensate for normal wear on parts.
+
The following type
of
governor is used:
1972 General Motors Corp.
July, 1972
SEC. 14 Page 1
