MR2 L4-122 1998cc 2.0L DOHC Turbo (3S-GTE) (1991)
Valve Clearance: Adjustments
Fig. 2 Intake Valve Shim Size Chart
Fig. 3 Exhaust Valve Shim Size Chart
Shims of various thickness are used to achieve the correct valve clearance, Figs. 2 and 3. Clearance should be .006-.010 for intake valves and .008-.012
for exhaust valves.
1.
With engine cold, place No. 1 cylinder at TDC of compression stroke by turning the crankshaft pulley and aligning its groove with the timing mark
``0'' of the timing pointer.
2.
Ensure valves on No. 1 cylinder are loose and valve on No. 4 cylinder are tight. If not turn crankshaft 360° (one complete revolution) and align
timing marks.
3.
With engine in this position check clearance of the following valves:
a. No. 1 intake and exhaust valves.
b. No. 2 intake valves.
c. No. 3 exhaust valves.
4.
Turn crankshaft pulley 360° (one complete revolution) and align timing marks as described previously and check the following valves:
a. No. 2 exhaust valves.
b. No. 3 intake valves.
c. No. 4 intake and exhaust valves.