This is a follow up post to the original (CA18DET Inline Oil Cooler (UK Factory Oil Cooler)) guide which describes how to install a US market (UK style) oil cooler onto the CA18DET.
Filling in the Blanks
As promised, I traveled back to the salvage yard to get the VIN number from the car and as luck would have it, it was gone. Fortunately, after a brief search, I spotted another Nissan Maxima of the same year that also sported the inline oil cooler. The VIN of this particular car is: JN1HT21S7KT222397 and an initial CarFax search listed the car as a 1989 Nissan Stanza with a CA20E motor. The CA20E motor is in the same family as the CA18DET and thus explains the compatibility of the oil filter adapters between the two motors. Although CarFax lists the car as a Stanza, the wikipedia page states that the car is indeed labeled a Maxima in the US market and came as such between the years of 1987 to 1989. However, during this time, the Maxima came with both a 6 and 4 cylinder engine and in this case, you will be looking for the 4-cylinder variant that came with the CA20E. So there you have it, if you are looking for this oil cooler to add to your CA18DET block, you will need to get the unit from a 1987 to 1989 US market Nissan Maxima with the Stanza engine (CA20E).
(Note: The CA20E was also available in the Nissan 200sx (s12 chassis silvia) from 1984 to 1988. The S12 FSM shows the oil cooler in several diagrams but I am unsure if the US market received the oil cooler so you may or may not be able to locate the cooler on these chassis.)