REMOVAL & INSTALLATION
The Type 1 and 2/1600 oil cooler is located under the engine cooling fan housing at the left side of the engine. The Type 3 cooler is located at the same position but is mounted horizontally. The type 4 and Type 2/1700, 2/1800, 2/2000 coolers are mounted near the oil filter, at the left corner of the engine.
The oil cooler may be removed without taking the engine out of the car. On Types 1 and 2/1600, the engine fan housing must be removed. On the Type 3, the cooler is accessible through the left-hand cylinder cover plate. The Type 4 and Type 2/1700, 2/1800, 2/2000 cooler is accessible through the left side engine cowling, working either in the engine compartment or from underneath the car.
The oil cooler can be removed after the three retaining nuts have been taken off. The gaskets should be removed along with the cooler and replaced with new gaskets. If the cooler is leaking, check the oil pressure relief valve. The studs and bracket on the cooler should be checked for tightness. Make certain that the hollow ribs of the cooler do not touch one another. The cooler must not be clogged with dirt. Clean the contact surfaces on the crankcase, install new gaskets, and attach the oil cooler. Types 3 and 4, 2/1700, 2/1800 and 2/2000 have a spacer ring between the crankcase and the cooler at each securing screw. If these rings are omitted, the seals may be squeezed too tightly, resulting in oil stoppage and resultant engine damage. Use double retaining nuts and Loctite on the cooler studs.
See Figures 1 through 6