Deceleration Valve: Service and Repair

NOTE: Overrun valves were deleted after engine number 8S64244.

Fig. 10 Overrun valve location and exploded view:

1. Loosen clamp securing inlet hose to overrun valve (2).
2. Remove retaining screws (1), then overrun valve from intake manifold, saving spacer (3) (right side valve only).
3. Clean all sealing surfaces and inspect for damage.
4. Reverse procedure to install, using new gaskets.