..since last year the pump started leaking fuel, especially when the weather is cold, in the winter it leaked fuel the most, I bought a "Spaco -1441" set for sealing the Epic pump, so I solved that problem too.

 

..we secure the pulley with two screws, so the belt doesn't need to be removed. This red tool is used to press the pump shaft off the pulley.

 

 

vor 4 Minuten schrieb gasa:

Since this is a pump with electronics, there aren't many complicated parts, in principle everything is easy to remove, replace the O-ring rubber, and put back in place.

 

...in principle, this gasket, the rubber, is the one that most often leaks fuel.

Bearbeitet (4. Mai 20251 J. von gasa)

...on the back of the pump, there are two large O-rings and one small O-ring. Everything is easy to disassemble and put back in place.

..at the end, the seal is replaced, first the screw is hammered into the seal with a hammer and then it needs a few threads to be screwed in and pulled out with pliers.

 

Before removing the pump, mark the place where it was mounted, so as not to move the ignition angle, later you need Lexia to adjust it.
I did not change all the O-ring rubbers, I did not touch these marked places, if necessary I can replace the rubbers without removing the pump.
1. is for the ignition angle.
2. is for the pump pressure
3. is the same with the ignition angle
because I do not have Lexia I did not touch them, because after dismantling all that needs to be adjusted.

 

Pay attention to this part of the pump, this thicker part, marked with a red arrow, must be in this place, because that is the start of ignition. If it is in another place, it will not start, you have to disassemble everything again. Basically, take pictures of everything, mark the positions of what you disassemble so you know how it was before disassembly.

 

 

Everything was put back in place, the air was purged from the nozzle and it started right up, no problems so far, I'm waiting for winter to see if it's leaking fuel somewhere. 

 

I did this on different epics some years ago. As far as I remember, you can‘t adjust really settings of the pump with lexia (e.g. in-pump-pressure). The only thing you can do, is controlling the timing, which is done static with a suitable pin, you insert in No. 1, until it slips in a corresponding hole. Then tighten the pump screws.

It is worth to inspect also the mechanical parts for wearing. The notch for inhection regulation for example and the stop solenoid (where the rubber gets hard and dissolves so that the engine won‘t stop). 

I also had an Epic with a bad wearing. But I didn‘t figure out, if it can just depressed without damaging something or if there is a trick.

Bearings can be replaced.

24 minutes ago, XM_Boris said:

[...] timing, which is done static with a suitable pin [...]

On the XM, there is very little space. With Lexia, you can read out the electronically adjusted timing and if need be correct the position of the pump accordingly to end up within the +/- 2° window.

vor 28 Minuten schrieb schwinge:

With Lexia, you can read out the electronically adjusted timing

 

vor 58 Minuten schrieb XM_Boris:

The only thing you can do, is controlling the timing,

🤔

Yes, the pressure cannot be determined, the only way to determine it is to count how many turns the screw is unscrewed and returned to the same position. Only the ignition angle can be determined.