Don't I just love cars ...
My wife's 93 AWD wagon's smokey 4G64 SOHC-16v needs a rebuild so I got another engine from the local wrecker, out of 93 (or perhaps 94) wagon. Had a machine shop strip and clean, and got back the empty block with new balance shaft bearings, crank, rods with new pistons fitted, complete assembled head and bucket of other bits and assorted bolts. OK, a day later I have sorted out what bolt goes where, and do a trial assembly.
Get to the new oil pump (from Rock Auto), add some oil, stick the balance shaft into the driven gear, and see if it turns. It does, but roughly. Put in the driven gear bolt, and the shaft jams solid. Pulled the pump apart and checked that the pump gears are aligned correctly: they are. The old pump is smooth as silk. Turns out that the pump chamber is about .020 too shallow at one end ie a manufacturing defect. Rock Auto is sending a replacement without waiting for the defective unit to return.
The old water pump bearings are shot, so I ordered a new pump from my local supplier. It arrives and its not the same: bigger with different bolt holes and a 3mm different positioned coolant pipe. They order a new one from a different supplier, and its the same as the first one. The supplier swears black and blue (and at me) that the 92-96 4G64 SOHC-16v Expo all use the same pump. I check the Rock Auto gasket set and there's TWO water pump gaskets: one that fits my old pump, and one that fits the other type.
So ... there are in fact TWO incompatible water pumps used in at least the
93, and probably the 94-96 too.I am sure glad I'm not paying someone else to do all this running (or is that F*NG) around. Up shot is of course that the engine will be perfect once its put in.
Let's hope the chewed up flywheel ring gear lasts until the new engine is FINALLY ready.
And then there's the 4G63T in my Summit GTX that's got a severe ring / piston failure (again) in #2. Its undrivable because of the smoke, and it will take a rebore to fix.
Stewart DIBBS