Hi guys,
I am reassembling the engine of my ‘92 GTO VR4. I have found evidence that the engine in this car is from a 1993 onward car, because:
-It has the later model oil pump
-It has the four bolt engine
-It has the forged crank shaft
I need an oil pump because the clearances on the current one are outside the limits listed in the manuals, and the relief valve was severely scored and seized. I am looking online for a new pump, and have come across huge price differences. Evil Empire Performance charges 360 pounds for an oil pump, but I have found ones on eBay for 70 dollars. (New, and the same model as far as I can tell)
I ran into a similar problem with a transmission of a 93 SL model. Between 92 and 94, they basically used surplus parts for these cars to save money. In other words, you can have a 92 car with 93 parts, or a 93 with 91-92 parts and so on. Best way to be sure what parts you need is to check the vin number