Inspection and Reconditioning (Rev 1/97)
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TK 3.88 Oil Pressure Control Valve
The oil pressure can be adjusted by adding or removing
shims located between the spring and the spring retainer.
The standard oil pressure is 43-57 psi (294-392 kPa).
Water Pump
1. Check the weep hole on the bottom of the water pump
for any signs of leaking coolant. If coolant is leaking
out of the weep hole, the mechanical seal is leaking and
the water pump must be replaced.
Water Pump and Thermostat Assembly
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2. Check the water pump bearing. If the water pump shaft
does not rotate smoothly, or if it is loose or wobbly,
replace the water pump.
Manifolds
1. Inspect the manifolds for cracks, damage, or a build up
of carbon.
2. Use a straight edge and a feeler gauge to check the
manifolds for distortion. Resurface or replace the mani-
fold if it is distorted more than .006 in. (0.15 mm).
Checking Manifold Distortion
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