F 250 2WD Pickup V8-7.3L DSL (1990)
ACTION:
Use the following service procedure to correct these conditions.
BELT CHIRP
1.
Start the engine and while idling, wet the ribbed side of belt by spraying water on the belt where it enters the A/C compressor pulley.
2.
Listen for belt "chirp" as the belt dries at the entrance point of each grooved pulley to identify the noisy pulley.
3.
If the "chirp" is at the power steering pulley entry, check for belt mistracking on the tensioner pulley, otherwise go to Step 13.
4.
Check press of the power steering pulley. The pulley hub should be flush with the end of the pump shaft.
5.
If the pulley is flush, start engine and while idling, visually compare the size of the gaps between the belt and front and rear flange of the tensioner
pulley. If the larger gap is twice as wide as the smaller gap, Figure 2, proceed with Step 6, otherwise, go to Step 13.
6.
Mark the accessory drive belt with an arrow to denote rotation of belt. Remove belt.
7.
Loosen all fasteners attaching A/C bracket to cylinder block and cylinder head. See Figures 3 and 4.
8.
Tighten nuts # 3 (and, on 1987-93 model only, bolts # 4) on side of cylinder block to 62 N-m (46 lb.ft).
9.
Tighten bolt # 2 on side of cylinder head to 47 N-m (35 lb.ft).
10.
Tighten bolt # 1 on front of cylinder head to 47 N-m (35 lb.ft).
11.
Install the accessory drive belt. Be sure belt is installed with arrow mark denoting original rotation of belt.
12.
Start engine and check for belt "chirp" noise.
