F 250 2WD Pickup V8-351 5.8L (1982)
Air Pump: All Technical Service Bulletins
Exhaust Air Pump - Moaning Noise
Article No. 83-16-21
NOISE - POWERTRAIN MOAN - AT APPROXIMATELY 2,000 RPM - 5.8L UNITS
LIGHT TRUCKS 1980-83 E, F AND BRONCO
FIGURE 29
A drumming and/or moaning noise, at approximately 2,000 RPM, may be the result of the exhaust air pump adjustment arm flange being too wide. The
flange may contact the body of the air pump preventing proper pump to bracket fit (Figure 29). Visual inspection can confirm if the condition is present.
To service this condition, the following procedure is recommended:
1.
Loosen alternator and air pump adjustment slot and pivot bolts.
2.
Move the alternator and air pump to a position that will allow the removal of both the alternator and air pump drive belts.
3.
Remove the air pump adjustment slot bolt and alternator pivot bolt from the alternator bracket, then remove the air pump adjustment arm.
