During late 1983 Model Year production, a vented oil fill tube (14071059) replaced the non-vented tube (Figure 2-35).
The vented tube will prevent the possibility of some oil entering the air intake system during oil additions. This vented oil fill tube is available through sen/ice as P/N 14071059.
Oil which has entered the intake manifold can cause damage if the amount is sufficient to cause hydraulic lock-up of a piston.
The vented tube should always be used in service when replacing the tube for any reason.
When replacing the fill tube on vehicles equipped with air-conditioning, a clearance modification must be made to the A/C hose support bracket (or use new P/N 14074317).
