Pump timing

[rkubicki]

What is the secret to getting this #@$%! lower injection pump mounting nut loose? ... . Can't seem to get anything on it and still have enough clearence to move the nut.



Rob

 

[Power Wagon]

Well, it isn't really a "secret", but the answer may not be obvious





You need a wrench, a box end 12 point, bent somewhat " L " shaped with the box part tweaked upward a bit, like an " L " with the toe kicked up a bit.



Just bending a wrench into an opened up "C" will work as well.



We custom built a wrench for it where I worked, that was a wrench curved into about 1/3 of a turn (actually just a bit more than 90 degrees curve) with a short handle welded on so you didn't need to bury your head under the hood to reach the nut.



I believe Snap-on makes a wrench just for it, so do others. I know a few years ago, someone came out with one just for Volkswagens (use the same pump and mounting flange), which is probably about the same.



You can get about 1 flat rotation on the nut, unless your wrench is bent just right, in which case you get about double that. It's 13mm just like the rest.



The most convenient means of turning the back one is a 1/4 inch drive socket, a "wobble" extension (snap-on makes them, dunno if anyone else does) that places a ratchet in the gap between the pump and the lines directly "back" of the adjustment screws. With just the right tools, I can move my timing in about 5 minutes.



Remember to loosen the bolt that holds the pump to the bracket just below the injection line outlets, and removing the linkage setup is just 2 nuts and a bolt with a 10 MM head just below (and out of sight) the working parts will give you a lot more working room. If you have the pump loose, but it doesn't want to turn, you can give it some gentle pursuasion with a long pry bar, alternately pushing or pulling against the top housing.



I would suggest marking the position of the pump using a sharp scribe along the edge of the flange where the "easy" to get nut is. This way, you can easily judge whether the pump moves and if it moves while you're trying to get it tightened back up again.



Good luck...

 

[Mel Fuelling]

An alternative if you're temporarily stuck with no torch to make

a special 13mm injector pump wrench with, is to unbolt your vacum pump(two 5/8ths bolts) and I think there is a pump suppor bracket under it that has to come loose and slide your vacum/power steering pump as ar towards the cab as you can(4-5 inches on mine). Tape a piece of cardboard over the resulting hole in the back of the timing gear cover so nothing can possibly fall or richochet into the timing gears.



Now you can reach the pump bolts with a straight wrench and you

can actually see the timing pin assembly.



I've had mine off several times and so far I've always reused the

original gasket after smearing a thin layer of "ultra black" silicone

on it with no leaks yet.

 

[Scot]

I used a 13mm Craftsman box end wrench that was cut off to about 3-4".