Celica Supra L6-2759cc 5M Ser (1982)
Valve Spring: Technical Service Bulletins
Engine - Valve Compression Spring Modification
REFERENCE ENGINE
NUMBER
043/TS155
DATE
8-20-82
MODEL
MA07
Valve Compression Springs
CYLINDER HEAD VALVE COMPRESSION SPRING MODIFICATION
To standardize the cylinder head, the valve spring seat has been recessed by 3 mm. Due to this change, the valve compression springs and their free and
installed lengths have also been modified.
PRODUCTION EFFECTIVE:
From Engine Number
Production Date
5M-3198694
December, 1981
From Frame Number
JT2MA67**C0018546
Valve Compression Spring Specifications
Previous
New
Part Number
90501-45013
90501-45017
90501-45020
(IN/EX)
(IN)
(EX)
Free Length
47.9 mm
49.1 mm
52.5 mm
Installed Length
40.0 mm
40.0 mm
43.0 mm
Installed Load STD
31.3-34.5 kg
34.7-38.3 kg
33.3-36.7 kg
Square Limit
2.0 mm
2.0 mm
2.0 mm
PART NUMBER INFORMATION:
Previous Part Number
New Part Number
Part Name
Qty/ Unit
11101-49295
*11101-49296
Head sub-assy, cylinder
1
*90501-45017
Spring, Compression (IN)
6
*90501-45020
Spring, Compression (EX)
6
*These parts are interchangeable as a set only.