some of the previous comments did not match my experience, so heres what I found:
the TC timing belt is wider than the single cam belt, which required the use of the VR4 oil pump pully (wider), which did not properly fit to the staz oil pump assembly. I dont remember the details exactly, i think it fouled the casing.
Anyway, to use the VR4 oil pump pully required the use of the VR4 oil pump assembly (ballance shafts were previously removed). This all went together fine, keeping the staz water pump, so the plumbing all faced the right way etc. I almost forgot, the staz/L300 water pump needs a bit of metal removed to give clearance to the tensioner pully. Not a lot, but it does foul unmodified.
All was proceeding well, untill I tried to fit the staz alternator.
Nope, it wont fit the VR4 oil pump caseing.
Use the VR4 alternator, which is a multi-peak pully.
No problem, fit the VR4 harmonic ballancer.
You cant fit the VR4 power steering pump, theres no mounting tabs on the staz block to do it. Note I think some later 4G63/64 blocks do have the required mtg points. As i dont have aircon, I used a power steer pump of a Nissan RB engine (multi-peak belt, matches the VR4 crank pully), and mounted the PS pump where the aircon compressor used to sit.
Mark Boxal has the template for the adaptor plate to do this.
Just a 10mm thick flat item, drilled and tapped to suite.
It all worked! And this leaves lots of room on the exhaust side for headers/turbo/inlet plumbing. 3 inch inlet plumbing too!
The blown ACL head gasket was partly caused by insufficent head tension.
It was torqued down to the requsite specification, however, the VR4 head bolts are about 1 turn to long for the staz block, or the washers are not thick enough, and the bolts were binding in the block.
The exhaust valves had hit the pistons at some stage, probably when the belt tensioner moved, alowing the cams to advance a bit.
The ex. valve pockets in the piston tops did not match the VR4 head.
Something else to watch for. My pistons came from the US and may have been for an eclipse.
Last edited by merlin
on Thu Nov 09, 2006 5:05 pm, edited 1 time in total.