Time for a rebuilt Fuel Distributor?

[virtualchuck]

It seems that I'm having a few different issues relating to my fuel system all revolving around the distributor. Most recently the plunger seems to get stuck every couple of weeks. It comes out easily when I take the FD off, it just seems to stick when I put it back together. I've tried every suggestion mentioned to clean it, and I know for certain I haven't dropped or scratched it... Is it normal to stick in cold weather?

I'm leaning towards getting a rebuilt one, I'm just wondering if anyone has any other last suggestions?

Chuck

[David T]

It seems that I'm having a few different issues relating to my fuel system all revolving around the distributor. Most recently the plunger seems to get stuck every couple of weeks. It comes out easily when I take the FD off, it just seems to stick when I put it back together. I've tried every suggestion mentioned to clean it, and I know for certain I haven't dropped or scratched it... Is it normal to stick in cold weather?

I'm leaning towards getting a rebuilt one, I'm just wondering if anyone has any other last suggestions?

Chuck

You must have some dirt or a burr somewhere. Get a flashlight and examine the bore carefully for any discoloration and clean it up. Use some crocus cloth and polish the plunger.

[virtualchuck]

You must have some dirt or a burr somewhere. Get a flashlight and examine the bore carefully for any discoloration and clean it up. Use some crocus cloth and polish the plunger.

I'm not familiar with crocus cloth, but it appears to be about an 800 grit polishing cloth? I'll give it a try, thanks!

Chuck

[NightFlyer]

You could also try rebuilding it yourself.

DPI now carries the rebuild kits, or you can source one from eBay seller cis-jetronic.

http://www.ebay.com/itm/Delorean-DMC-12-Bosch-Fuel-Distributor-repair-kit-for-0438100109-/181289206553?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a35adc319

Here's a link to a most excellent step-by-step how-to courtesy of the Porsche 928 guys:

http://www.porsche928forums.com/download/manuals/CISRebuild.pdf

[ALEXAKOS]

You could also try rebuilding it yourself.

Have you ever done one, or more?
Have heard that once you open that up, it is impossible to reseal it.

[virtualchuck]

You could also try rebuilding it yourself.

DPI now carries the rebuild kits, or you can source one from eBay seller cis-jetronic.

http://www.ebay.com/itm/Delorean-DMC-12-Bosch-Fuel-Distributor-repair-kit-for-0438100109-/181289206553?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a35adc319

Here's a link to a most excellent step-by-step how-to courtesy of the Porsche 928 guys:

http://www.porsche928forums.com/download/manuals/CISRebuild.pdf

I did see that kit and I'm tempted to try it... but to be honest, I am completely TERRIFIED of a fuel leak leading to a fire in the engine compartment. I would feel much more comfortable leaving that to a professional...

Chuck

[NightFlyer]

Have you ever done one, or more?
Have heard that once you open that up, it is impossible to reseal it.

If someone else can get it resealed, then why can't you or I?

I've yet to rebuild one myself, however, I do have a used FD that needs to be rebuilt and will attempt to do so once I find the time to do it....

[ALEXAKOS]

Well that is just it! I gave read and heard from several sources that resealing this successfully is as common as being the first winner in a bingo room. After skills it is pure luck.


Sent from a mobile device. Please excuse typos etc

[David T]

Well that is just it! I gave read and heard from several sources that resealing this successfully is as common as being the first winner in a bingo room. After skills it is pure luck.


Sent from a mobile device. Please excuse typos etc

You do not have to take the fuel distributor apart. You can separate it from the mixture unit if necessary. If you can't find crocus cloth get some 2000 sandpaper. Before sanding try some Brakeclean to clean up any residue of old, sticky gas or Acetone.

[elfking]

I sent mine out to one of those eBay rebuild places, long story short they took 2 months to get it back to me and it leaked!

I then took it apart myself cleaned it up again, found a ripped o-ring, replaced it and revealed it myself. Almost two years now and it's not leaking and working perfect. Others gave you the rebuild PDF .. I took some pictures when I tore mine apart, just take your time. Have a clean place to lay it all out and put it all back where you found it...

Or pay a trustworthy source for one!

Last post...
http://dmctalk.org/showthread.php?t=481

[Elvis]

AFAIK BOSCH does not sell any rebuilding kits with a certain reason behind it.

BTW Deloman - Wolfgang Hank - haas good contacts to BOSCH, he went to a class
how the fuel distributors are put together and what it needs to do this job correctly.


He as a pro will NEVER take one apart and put it back together himself !

[Bill6298]

You could also try rebuilding it yourself.

DPI now carries the rebuild kits, or you can source one from eBay seller cis-jetronic.

http://www.ebay.com/itm/Delorean-DMC-12-Bosch-Fuel-Distributor-repair-kit-for-0438100109-/181289206553?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a35adc319

Here's a link to a most excellent step-by-step how-to courtesy of the Porsche 928 guys:

http://www.porsche928forums.com/download/manuals/CISRebuild.pdf

I found a more detailed set of instructions from the folks that make that kit. Although like the Porsche doc, this one isn't a perfect match either:

http://www.cis-jetronic.com/public_doc/07.3-0997-06.pdf

It seems there are two issues to overcome:

1 - Leaks from the diaphragm. Another thread references this as the reason DPI had their own diaphragm manufactured.

2 - I can only speculate that another problem is someone not taking the time to be very precise. Reading the PDF I referenced gave me a better appreciation for the labor required to rebuild. I suppose skill and practice go hand in hand with precision.