Chrysler Full-Size Vans 1967-1988 Repair Guide

Engine Design


See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Cutaway view of the 225 Slant Six engine-whether it's an inline or in a V configuration, all over head valve push rod engines have a similar internal component relationship

The 170, 198 and 225 Slant-Six engines are inclined toward the right at an angle of 30° from the vertical. The engine uses in-line overhead valves and wedge shaped combustion chambers with adjustable mechanical tappets through 1980. 1981 and later engines employ hydraulic lifters. The lubrication system consists of an externally mounted rotor type oil pump on the lower right-hand side of the block. The semi-series flow cooling system contains an aluminum water pump body with a pressed-in ball bearing and seal assembly.

The diesel engine is a Mitsubishi built, inline 6-cylinder with overhead valves. The diesel engine is entirely metric, therefore requiring the use of metric tools.

All V6 and V8 engines used are valve-in head type engines with wedge shaped combustion chambers. All are equipped with hydraulic tappets. The 318 and 360 lubrication system is a rotor type oil pump mounted on the rear main bearing cap and a full-flow, throwaway element filter located on the lower right-hand side of the block. The 400 and 440 oil pump and filter are on the outside of the block at the front of the engine.