T100 Regular Cab Pickup 2WD L4-2693cc 2.7L DOHC MFI (1998)
Timing Chain: Service and Repair
Inspection
INSPECTION
1. INSPECT TIMING CHAINS, TIMING GEARS AND TIMING SPROCKETS
a. Measure the length of 16 links with the chain fully stretched.
Maximum chain elongation:
No.1 Timing chain 147.5 mm (5.807 inch)
No.2 Timing chain 123.6 mm (4.866 inch)
If the elongation is greater than maximum, replace the chain.
HINT: Make the same measurements pulling at 3 or more places selected at random.
b. Wrap the chain around the timing gear and timing sprocket.
c. Using vernier calipers, measure the timing gear and timing sprocket diameter with the chain.
NOTICE: Vernier calipers must contact the chain rollers for measuring.
Minimum gear diameter:
Camshaft 113.8 mm (4.480 inch)
Crankshaft 59.4 mm (2.339 inch)
Balance shaft 75.9 mm (2.988 inch)
Minimum sprocket diameter:
No.2 crankshaft 96.7 mm (3.807 inch)
If the diameter is less than minimum, replace the chain, gears and sprocket.