Author Topic: Fuel distributor rebuild kit - worth a try?  (Read 84 times)

raueda1

  • Classic
  • **
  • Posts: 227
  • W116 Enthusiast
  • Location: Salt Lake City, Utah
Fuel distributor rebuild kit - worth a try?
« on: 14 May 2019, 12:10 PM »
Seems like the outcomes with these kits is mixed at best.  Or is it?  You can get the kit for US$70 or so on eBay.  In the worst case I send the FD to Flowtech and I'm out $70.  OTOH if it works then I've save a lot and had the fun of the project.  I've got the cast iron FD.  Any thoughts or experiences to share?  Thanks,
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

s class

  • W116 Addict
  • ****
  • Posts: 4,114
  • I'll keep the 116's, the rest can go
  • Location: Squeezing 3 W116's into a double garage
Re: Fuel distributor rebuild kit - worth a try?
« Reply #1 on: 14 May 2019, 12:35 PM »
I do a lot of fd rebuilds, and I can give you some pointers off line.

In broad strokes, you should succeed with rebuilding a cast iron unit without any special tools or facilities.  The alloy units have flow adjusters for each port, and need to be mounted on a flow test bench to calibrate.  I think it's basically impossible to rebuild an alloy unit without proper calibration facilities.

'76 6.9 Euro, '78 6.9 AMG, '80 280SE, '74 350SE, '82 500SEL euro full hydro, '83 500SEL euro full hydro , '81 500SL

Randys01

  • Enthusiast
  • *
  • Posts: 91
  • W116 Enthusiast
  • Location: adelaide australia
Re: Fuel distributor rebuild kit - worth a try?
« Reply #2 on: 15 May 2019, 02:56 AM »
I've not had any luck.. The local Ozzie guru has flamed out on 2 cast iron units I sent in for o/haul after  I  flunked.
The expert's opinion is that the cast iron units are getting old and worn  .yep after 40 years, the dripping water on the stone is having an impact.
The biggest niggle is idle.fuel flows are down to minuscule values. how they ever got the cast iron units to idle has me intrigued.
 I've had a couple of alloys ohauled and once mounted, the idle was ho hum
 I have my own calibration/diagnostic system now and you can really tune the alloys.

raueda1

  • Classic
  • **
  • Posts: 227
  • W116 Enthusiast
  • Location: Salt Lake City, Utah
Re: Fuel distributor rebuild kit - worth a try?
« Reply #3 on: 15 May 2019, 06:40 PM »
Thanks for the input.  Sounds to me like there's little to lose and yet potentially something to gain, even if success isn't assured.  I'm gonna go for it and will report on my findings.  Cheers,
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0