Fuel injection refurbish

[stephers]

I have some suction valves for sale if you need them. They have been checked out by a fuel injection company  Tested OK   Let me know

 

Thanks, Rick

[mvliotta]

Thanks for the offer, Rick, but it looks like the problem is not my suction valve but a stuck piston in the injection pump... maybe??

Swapped suction valves, still very weak flow out of # 3 compared to the rest. Swapped fuel delivery valves, still no luck.

How does one 'unstuck' a piston?
Also tried to push down the exposed piston tops (after suction valve removed) like others have done with a wooden peg but could not budge on any of the ports.

I'm stuck, just like that damn piston, arghh.



Sent from my iPhone using Tapatalk

[SydneyTii]

Are you sure it's stuck?

i would encourage you to read Rob Siegel's post re his fun filled adventure into Kugle madness! 

A strange disease of the mechanical mind.

It had an interesting outcome!

the fault finding chronology alone will make you smile or wince with empathy.

 

Edited February 22, 2017 by SydneyTii

[mvliotta]

Wel, SydneyTii, I owe you and Rob Siegel a beer..

 

Of course, you were correct! Turned out to be an injector that did not pop. Confirmed with a spare. 

 

I did not suspect the injector because they were just cleaned and tested! Turns out that the preserving oil they used sometimes causes the injector to get vacuum-locked. Just needs a firm smack is all.

 

Soooo... back in business to tune her up! Final pictures for this thread later.

 

Vince

[mvliotta]

After a bit of hiatus, back to working on the car. 

 

Thought I would post a pic of my solution for reducing wear for the spring retracting the intermediate shaft. I added a freely rotating bushing to my early style intermediate shaft upper piece and wrapped the part of the spring that hooks onto the bushing with a bit of heat-shrink tubing (have to look hard in photo to see this). 

 

BTW, also obtained a clip for the return fuel line! (lower-right in pic)

 

 

 

While I was working on linkages noticed that the hose on the bottom of the warm up regulator (coolant inlet, I think) is old and cracking. Got to replace it. Any tips for removing the WUR without getting coolant all over the place?

 

 

 

 

 

[lilmo]

12 hours ago, mvliotta said:

After a bit of hiatus, back to working on the car. 

 

Thought I would post a pic of my solution for reducing wear for the spring retracting the intermediate shaft. I added a freely rotating bushing to my early style intermediate shaft upper piece and wrapped the part of the spring that hooks onto the bushing with a bit of heat-shrink tubing (have to look hard in photo to see this). 

 

BTW, also obtained a clip for the return fuel line! (lower-right in pic)

 

 

 

 

 

 

 

 

 

Nice solution!  Always found it hard to believe they just put that spring hook through a hole in that plate.  

[JohnS]

"BTW, also obtained a clip for the return fuel line! (lower-right in pic) "

 

Where did you get the clip for the return fuel line?  I'm in need of two of those clips.  Nice work,

John

 

[mvliotta]

John - That clip is available new from BMW for ~$13. First page of this thread has the realoem parts page. 

 

Didn't want to spend that much on a &%$#% clip, got mine second hand from a FAQer.

[jgerock]

22 hours ago, mvliotta said:

After a bit of hiatus, back to working on the car. 

 

 

While I was working on linkages noticed that the hose on the bottom of the warm up regulator (coolant inlet, I think) is old and cracking. Got to replace it. Any tips for removing the WUR without getting coolant all over the place?

 

 

 

 

 

Get a coffee can ready, remove the hose the inspect the upper coolant branch for corrosion.  Could be crusty in there.