It's another first, like all the others . Nobody has even thought about it, all they want to do is fit inferior aftermarket parts.

Cold oil is a bit thick for these sorts of tests. Diesel would be better for showing up any defects. I can do a freeflow test and measure the volume flow rate. Can do a zero flow test and measure the pressure set by the relief valve. I can do both tests with oil, then repeat both tests with diesel. I've got 4 pumps on hand right now. One measures like brand new it's done less than 5000Ks. Others have done more but actual is unknown. There's 3 specs to measure. The outside gear to the case. The gears to the cover plate. The tip clearance. Combining all 3 specs then flow ad pressure tests will determine how good any used pump actually is. No guesswork..

@@1magnit I always wondered if the over pressure springs actually work and if people test them. Ive got a 6g72 dohc mivec on the stand, disassembling it lately. No car to put it in yet actually.

@@Michael-lg4wz The non crossover blocks use an 11mm wide gear and the GTOs / Pajeros use a 12mm gear. That's one reason for measuring the flow. One of many reasons. The relief valve , it's supposed to open at about 80 PSI, testing might confirm. The spring for the relief valve, the manual says it's 43.X mm long but mine is 45 mm.

@1magnit are you based in Wellington? Id be keen to come have a look at your build