Inspection and Repair

Inspect valve springs

Check for damage, squareness, rust and distorted coils.

Measure the spring free length and replace if less than below.

MM (IN)

Spring	Free length	Color
(1) Secondary regulator valve	32.9 (1.295)	PURPLE
(2) 2-3 shift valve	30.8 (1.213)	PURPLE
(3) Reverse control valve	25.6 (1.008)	-
(4) Second coast modulator valve	25.3 (0.996)	ORANGE
(5) 3-4 shift valve	30.8 (1.213)	PURPLE
(6) Lock-up relay valve	23.4 (0.912)	RED

Fig 1: Identifying Valve Springs

Courtesy of ISUZU MOTOR CO.