!979 Rabbit Diesel Need help!

[TylerDurden]

IP pulley & shaft have a half-moon key in the slot to keep the pulley from turning on the shaft.



Note the small hole for the locking pin.

[vw-tim]

oh yeah the key is in there. I dont understand thought the timing is on like ive had the engine idling when i have the cold start switch on.

so i guess what if all of that is good? what is keeping the load on the gauge then? or why isn't the gauge moving back down?

[vw-tim]

 - The IP internals are whack (usually 180)

could this be the issue? and if it was usually 180 wouldnt it not want to run at all and not idle with the cold start switch?

[TylerDurden]

They run crappy when 180 out, but they do run.

Here's the general idea:

When the engine reaches #1 TDC, The internal IP camplate pushes the plunger into the HP (high pressure) head (toward the driver' side). The exact amount of push is measured with the gauge.

So, if the engine is at TDC and turning backwards, the gauge reading should reduce as the plunger backs out of the HP head.

[TylerDurden]

I'd also check that the gauge is not binding, by gently pulling on the top of the pin (has the knurls).

[vw-tim]

They run crappy when 180 out, but they do run.

Here's the general idea:

When the engine reaches #1 TDC, The internal IP camplate pushes the plunger into the HP (high pressure) head (toward the driver' side). The exact amount of push is measured with the gauge.

So, if the engine is at TDC and turning backwards, the gauge reading should reduce as the plunger backs out of the HP head.

okay so say im at TDC and i put the gauge in pre load it to 3mm. so as i rotate the engine backwards making the IP turn it should bring the gauge down to 2mm correct? and so in my case it increases it to like 4mm so that means that the pump could be off then? or 180?

[vw-tim]

I'd also check that the gauge is not binding, by gently pulling on the top of the pin (has the knurls).

okay ill check that too i dont think its binding at all though

[TylerDurden]

AIUI, 180 would still show a drop. The camplate has a rise every 90... so it seems the plunger is starting in a valley, which is more like 45 (or its other three cousins).

[theman53]

http://vincewaldon.com/index.php?option=com_content&task=view&id=24&Itemid=28

[TylerDurden]

The springs in the IP tend to make it snap into a cam-valley when putting the belt on, so the locking pin is used to keep the pulley static when installing the belt.

If you can't line up the holes and lock the IP pulley when the crank is at #1 TDC, the belt will need to be slacked and the pulley turned to the locking position.

[TylerDurden]

I rekon it should be explicitly stated to ensure the engine is being turned the proper direction; or the gauge will rise rather than fall.

The engine normally turns CW, if one views from the passenger fender.

[8v-of-fury]

Having the pump internals 180* out will not show any issue during the gauge part of the timing procedure. You won't notice it until you attempt to run it Impossible to be 90* out and have the pump go back together.

I think unfortunately here it is just a lack of the know-how.

Your pictures show that you do have everything lined up correctly. You can see his TDC mark, and the pump is in the center of its moving area. You can also see in the pump shot that the pulley is at TDC as well, by the small gash in the one rib.

You go from 2.29mm pre-load at TDC, and then rotate the engine Counter Clockwise to 4.74mm? Even if you went clockwise the gauge would only go up to a certain spot and then go back down, to the same lowest spot it would go to by turning counter clockwise.

You are probably just turning the pump the wrong way. Small things.

[TylerDurden]

The gauge is also likely binding - even if the engine is turned the wrong direction, the gauge should move when turning the engine back.

[vw-tim]

Having the pump internals 180* out will not show any issue during the gauge part of the timing procedure. You won't notice it until you attempt to run it Impossible to be 90* out and have the pump go back together.

I think unfortunately here it is just a lack of the know-how.

Your pictures show that you do have everything lined up correctly. You can see his TDC mark, and the pump is in the center of its moving area. You can also see in the pump shot that the pulley is at TDC as well, by the small gash in the one rib.

You go from 2.29mm pre-load at TDC, and then rotate the engine Counter Clockwise to 4.74mm? Even if you went clockwise the gauge would only go up to a certain spot and then go back down, to the same lowest spot it would go to by turning counter clockwise.

You are probably just turning the pump the wrong way. Small things.

ha okay ill turn it the other way and see what it does. Thanks man

[vw-tim]

okay so update! i got it to work and i was turning  it the correct way but i guess i had the thump screw to tight on the gauge and it was binding