PredatorZ

I'm getting ready to do a timing belt change, is it necessary or important to change the Cam Sprockets also ? That's one thing I don't have at the moment. I was also reading to change out the tensioner stud when replacing the tensioner, I have a new tensioner and spring, just no stud, so I'd need to get one of those also. I do have all new seals, cams and crank I believe, which would require removing the sprockets, so is it a deal breaker, or can they be reused ? My car has 88,000 mile atm.

noboosts130

Its not necessary to change the sprockets, but one upgrade i've heard is to switch to vg33 sprockets. The belt lasts 100k miles vs 60k.

PredatorZ

Ill look into that

noboosts130

Search Round tooth timing belt swap

PredatorZ

Looks like the VG30 changed to round teeth on the cam sprockets in 94, most VG33's have round teeth, like a 96 pathfinder. The belts changed also, to match the tooth profile on the sprockets (makes sense), so Ill probably change to the round toothed sprockets in another 60K and then be good for 100k per belt after that. I'm guessing the square teeth are harder on the belt and wear them down faster. Good tip to know I found this adjustable set that comes in round or square teeth, pretty cool. Z31Parts.com :: High Performance Z31 300ZX Parts

noboosts130

It looks like you can only retrofit a W-series 3.0L because of crank snout diameter. The crank sprocket from a 33 won't fit on a A/B-series 3.0L.

PredatorZ

I wonder what the expense would be to have a part designed and milled on a CNC machine, if that would be a doable project, I'm enrolled to start CNC school next semester, could be a class project possibly modify an existing part.... just dreamin

hoov100

[quote=PredatorZ;316289]I wonder what the expense would be to have a part designed and milled on a CNC machine, if that would be a doable project, I'm enrolled to start CNC school next semester, could be a class project possibly modify an existing part.... just dreamin [

With what you could make for a VG, you would make a crank pulley so you could get a measly 40k extra miles out of a $60 timing belt?

PredatorZ

ya, you are right. dumb idea, not very practical

PredatorZ

I haven't been able to confirm that the crank snout diameter did change between the A/B and W versions of the motor, where did you source that reference, I was posting on Z31 performance, and I was told it did not change, does anyone have practical experience with this mod, there seems to be a lot of bad information out there, would be nice to get a definite yes or no from someone who has done it.

rogerz

I just did the belt on my 86T. spent lots of time on the internet trying to get cheapest parts. After all was said and done. Just go to courtesy nissan and buy the kit. save a lot of time and got what you need.

You do need those tin pieces that look useless in the picture but to get to the front end crank seal replacement you destroy those. one nice piece of info that was hard to dig up is you need to put a 10KG (22 lbs) weight on the belt and measure deflection to get correct tension (1" I seem to remember). BE sure you replace that little piece of rad hose that is stuck back in there before you commence the belt install. If you want to replace fpr that would be the time to do it.

PredatorZ

Hose-water part#14055-01P00
and Front Crankshaft Sprocket Plate part#13023-V5000
and Rear Crankshaft Sprocket Plate part#13022-V5001

I believe these are what you speak of ?