Patrol 4x4 - Nissan Patrol Forum banner
1 - 8 of 8 Posts

·
Registered
nissan
Joined
·
258 Posts
Discussion Starter · #1 ·
Hi Guys,

Got A new pump im chucking on my 94 st ute and just wandering if anybody has some tips,tricks or pics when they have done youres im a diesel mechanic by trade so just need so heads up of what to expect


Cheers Mitch
 

·
Registered
Nissan
Joined
·
85 Posts
Loosen PS pump, remove belt, and slide it out of the way.
Remove lower radiator plastic fan shroud for access to crank nut, and timing case cover plate nuts.
#1 TDC compression is when timing marks on crank pulley align, and "z"s align on the drive gears. If the "z"s aren't aligned, rotate engine one full turn (pump rotates at half engine speed) and then they should be aligned.
You can use a 3-jaw puller to get the gear off, but access is tricky. There are two 8mm thread holes on the drive gear, perhaps for use with another type of puller.
There's a woodruff key locating the gear on the pump input shaft. When the engine is at #1TDC compression (and the "z"s align), then the key is at about 11 O'clock position, so not likely to just drop out, but plugging the gap in the timing case with rags, and checking/removing the key once the gear is off may be a good idea.
There's an almost hidden bolt right under the pump, securing it to a bracket attached to the block.
There's a paper gasket between pump and timing case - easy to cut one, it's just a triangle with 4 holes in it.
Aligning the "z"s and woodruff key when reinstalling isn't easy. I did mine by installing the pump - loose so it could be rotated, and sliding the gear in, but as the gears are helical cut, then it rotates slightly as the gear slides in. Another way is to put the gear in place with the "z"s aligned, hold it, and then slide the pump in from behind - but the pump is quite heavy, so I doubt there's an easy way. You need a good work light.
 

·
Registered
nissan
Joined
·
258 Posts
Discussion Starter · #4 ·
just wandering if anyone in perth has the dial gauge with extension for setting up timing on these that i can borrow for money or beer?


Cheers Mitch
 

·
Registered
Joined
·
3,955 Posts
there's a very fine scribe mark on the top outer mounting tab of the fuel pump.
It doesn't look like it but it's actually factory.
getting the gear off takes a lot of force from the puller. I think I used a decent 2 jaw in the holes cast in the gear.
getting the gear back on is a pain. the pump shaft just doesn't want to be in the right place, I put the shaft as close as I could get to the right spot, then meshed the gear, slid the pump in from the back onto the gear.

tip: easy way to slowly turn it over is to put it in 5th and nudge the car along the floor but you probably already know that.
 

·
Registered
Nissan
Joined
·
85 Posts
Pump specialists who recond my pump were adamant that with pump set to factory spec, and standard injectors, then using the timing marks would be good - and that I'd be wasting $ getting them to set it with a gauge. (IIRC, yes - that should give 0.74mm) The scribe marks are very fine lines, so easy to line up to within a fraction of a degree. Watch that the pump doesn't rotate off the marks when you tighten the bolts.
 

·
Registered
nissan
Joined
·
258 Posts
Discussion Starter · #8 ·
does anyone have the procedure for doing the timing using the dial indicator i lent my factory manuals to a mate in geraldton so sort off a bit lost how to do it atm cheers for any help
 
1 - 8 of 8 Posts
Top