Mechanics

TIMING BELT

1993 Ford Mustang

Engine Performance problem
1993 Ford Mustang 4 cyl Two Wheel Drive Automatic 300000 miles

How can I change the timing belt on a 1993 Mustang?
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Waren67
December 13, 2008.



TIMING BELT
Checking Timing
Remove plug from outer timing belt cover. See Fig. 5. Rotate engine clockwise and position cylinder No. 1 on TDC of compression stroke.
CAUTION: Rotate crankshaft clockwise (in normal rotation direction) only. Timing belt may come off if engine is rotated counterclockwise.

Ensure " 0" mark on crankshaft pulley aligns with " 0" mark on outer timing belt cover. Looking through plug hole of outer timing belt cover, ensure camshaft sprocket timing mark aligns with cover pointer. See Fig. 5.
If all timing marks are not aligned, remove timing belt. Properly position sprockets, and then install timing belt.
Removal
Rotate engine clockwise and position cylinder No. 1 on TDC of compression stroke. Ensure " 0" mark on crankshaft pulley aligns with " 0" mark on outer timing belt cover.
Looking through plug hole of outer timing belt cover, ensure camshaft sprocket timing mark aligns with cover pointer. See Fig. 5.
Remove drive belt, water pump pulley and automatic belt tensioner. Drain cooling system. Remove upper radiator hose. Remove thermostat housing and gasket.
Remove retaining bolt and crankshaft pulley. Remove hub assembly retaining bolt from crankshaft. Remove outer timing belt cover. Ensure camshaft sprocket timing mark aligns with cover pointer. See Fig. 5.
Loosen belt tensioner bolts. Release spring tension on belt tensioner using Camshaft Belt Tensioner (T74P-6254-A). Rotate belt tensioner away from timing belt, and tighten bolts.
Remove retaining bolts, and pull crankshaft sensor from dowel pins. See Fig. 5. Remove hub assembly and belt guide. Note direction of belt guide installation.
Remove timing belt. If camshaft sprocket requires removal, use Camshaft Sprocket Holder (T74P-6256-B) to hold camshaft, and remove camshaft sprocket bolt.
Remove camshaft sprocket and belt guide. Note direction of belt guide installation. If crankshaft sprocket requires removal, use Crankshaft Sprocket Remover (T74P-6306-A) to remove crankshaft sprocket. Note direction of sprocket installation.
Installation
Install crankshaft sprocket (if removed) with recessed area facing rearward. Install belt guide with flat side toward camshaft sprocket. Install camshaft sprocket with timing mark outward.
CAUTION: Install new camshaft sprocket bolt. DO NOT reuse bolt.

Install new camshaft sprocket bolt, and tighten to specification while holding camshaft with camshaft sprocket holder. See TORQUE SPECIFICATIONS.
Align camshaft sprocket timing mark with pointer. Properly position crankshaft so timing mark aligns with notch in front cover casting. See Fig. 6.
Fig. 6: Positioning Crankshaft
Courtesy of FORD MOTOR CO.
NOTE: If necessary, push belt tensioner against timing belt; spring tension may not move belt tensioner against timing belt.

Install timing belt over crankshaft sprocket and then counterclockwise over auxiliary shaft and camshaft sprockets. Loosen belt tensioner bolt and allow enough tension to take slack out of belt. Tighten tensioner bolt.
Remove one spark plug from each cylinder. Rotate engine clockwise (viewed from front of engine) 2 complete revolutions.
Have an assistant hold crankshaft from moving. Using a torque wrench, turn cam sprocket counterclockwise to 40 ft. Lbs. (54 N.M). While holding crankshaft and camshaft, tighten timing belt tensioner bolts to specification. See TORQUE SPECIFICATIONS. Ensure all timing marks align properly. Install belt guide on crankshaft.
Install crankshaft sensor over dowel pins. Tighten long crankshaft sensor bolts to 14-22 ft. Lbs. (19-30 N.M). Rotate crankshaft counterclockwise approximately 45 degrees so outer vane of hub assembly does not engage with crankshaft sensor positioner.
Install hub assembly. Rotate crankshaft clockwise approximately 90 degrees so outer vane of hub assembly engages with crankshaft sensor positioner. See Fig. 7. Tighten short crankshaft sensor bolts to 14-22 ft. Lbs. (19-30 N.M).
Fig. 7: Positioning Crankshaft Sensor
Courtesy of FORD MOTOR CO.
Rotate crankshaft approximately 90 degrees counterclockwise, and remove crankshaft sensor positioner. Rotate crankshaft approximately 90 degrees clockwise.
Measure clearance between outer vane of hub assembly and crankshaft sensor. Clearance should be.018-.039" (.46-.99 mm). To install remaining components, reverse removal procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS.
Disconnect heater hose from fitting on thermostat housing to bleed air from cooling system when filling. Fill cooling system until coolant flows from fitting. Install heater hose. Refill radiator.

Dave H
Dec 13, 2008.