As you can read here in my "new member" introduction post, http://www.nissanpat...d21-from-italy/, I'm slowly restoring my '89 WD21.
Some of you might like to take a look to some photos of the "work in progress", so...
My engine developed a rod knock which I believe is due to debris from a broken timing chain tensioner which clogged oil passages in the crankshaft (I will check this later). Anyway, I decided to buy another motor.
Z24 engines are very rare in Italy (where offroads vehicles are mostly diesel because petrol prices being insanely high); the only one I could find was 700kms away. I could have it shipped, but did prefer to go to pick it up in order to check it as thoroughfully as I could (was off the car). Crank was good, compression seemed to me a bit low (turning it by hand), but was very clean under the valve cover and decided to take the risk. After all, I can always use the head from the other engine in case compression leaks should be imputable to the head.
As said, in spite of the dirt on the outside, the inside is super clean, surely a sign that the engine had correct maintenance.
Oil pan super clean, too.
Clutch is pretty worn
The engine will receive a new timing chain kit, new spark plugs, new oil seals, new air and oil filters, new distributor cap & rotor, a new clutch and 0w40 full synth oil. Water pump and crank pulley, slightly bent from the impact (the engine is off a crashed car) will be taken from my old engine (this will be a budget repair).