ip question

[jack's lack]

so i got my giles pump in the car, and i have cracked the lines open at the injectors to prime it, i have cranked it until the battery died (about 3 minutes) and no sign of the fuel yet, what am i  doing wrong ??

[jtanguay]

the pump could be dry... not a good idea to be letting it crank dry for too long either.  I'd say get a hand primer (the style ones you see on boats for example) and get fuel flowing into the pump.  The pump will not automatically start to suck fuel into itself, it uses some hydraulic principles to keep the fuel flowing.

so stop trying to start the motor before you prime it!  but you did good by cracking the injector lines... would take probably 5 minutes for the air to bleed out of the injectors hehehe dont ask me how i know  :oops:

[jack's lack]

yep that was it. filled the pump with diesel took about a pint and topped of the filter. she started up a few hicups and some smoke but she came up to temp and i drove her around a bit and i even chirped tires on dry pavement .

don't know why i thought the pump could pull the fuel up when it was full of air :oops:

so i'm gonna keep messing with the timing. when i tensioned the timing belt the cam and the pump were locked but the crank advanced a bit ( i could still see the 0 mark through the timing check hole) so when i timed the pump i timed it to TDC on the crank. at that point the cam and the pump were about half a degree behind, is that right so i set it to .96mm @ TDC, which went up to 1.27mm when the cam and the notch on the pump pully lined up

the bentley says from .82mm to .92mm was stock and that from .92mm to 1.02mm would  be performance are these good numbers?? i'm looking for  that magical balance between power & fuel economy

[jtanguay]

i think most people would say advanced timing is good for economy.  bad for emissions though, which supposedly is the only drawback? correct me if i am wrong.

glad to hear you got your giles pump running!  if you are running 1.27mm timing... you really really need to fix it hehe

its 1.00mm +- 0.05mm so you could go as high as 1.05mm.  i have no experience with timing though... but i will when i install my pump!

[LeeG]

The direction you turn the tensioner is critical too.  Like Bently says, you want to go clockwise.  If you look at what this does, it moves the tensioner up closer to  and in front of the cam pulley, causing the belt to wrap further around the cam pulley, using up slack.  Turning C-Clockwise pushes belt in middle between cam and crank...you can get it tighter that way, but tight isnt really the goal, we really want no slack, not tension.


If the crank moved on you as you were setting belt.....sure you have the cam pulley loose on the camshaft so it can rotate on its taper?  ie: crank at TDC, pump locked, cam locked, cam pulley free to rotate.

[jack's lack]

i didn't loosen the cam sprocket, didn't know it could be adjusted, i thought it was keyed in place like the pump sprocket. :oops: i must have put that belt on 10 times moving the crank back and forth a tooth hoping i would get it right.

guess i know what i'm doing tomorrow, i did rotate the tensioner clockwise but i think it is too tight as well so i got a couple of things to fix,

so after i fix all that it i should time the pump to 1mm or .040 inches (cause the stupid ass dial indicator i have is in inches :x )@TDC (and everyone will then be at TDC simultaneously )

btw even with the timing a little off the pump is kicking ass i can wind it out like never before and just a hint of smoke not that huge cloud i used to get, not even the same car, and at low rpm when i step on it hard the torque actually puts me in my seat for a second. Giles rules, well worth the wait.

[LeeG]

Bently doesnt do a good job describing the cam pulley.  I didnt get it right the first time I did it either.  Its on a taper on the end of camshaft.  No key.  Loosen the bolt and put a puller on it (or tap it off taking care not to break it.  Take it right off and clean both sides of taper well, as you dont want to risk it slipping later.  Reassemble leveing it loose enough that it will spin on cam.  Lock cam and shim the lock plate so its level.  

There is an excellent description of installing belt and tensioning it :  http://www.vwdiesel.net/phpBB/viewtopic.php?t=3587  6th post from top, written by wlydman

[jack's lack]

hey thanks so much for your help, knocked the whole job out in about 90 minutes everyone is hitting TDC simultaneously now, and i only had to tweak the timing on the pump a hair to bring it to 1mm

so the next question, i took it out on the highway and really wound it out (i don't have a tach but it was the highest i,ve ever reved it)and not even a touch of black smoke, should i turn max fuel up? or does that mess up whatever voodoo Giles worked on my pump?

[LeeG]

What were the EGTs?  That is the real question you need to answer before adding more heat.