PeachParts Mercedes-Benz Forum - 1985 300SD Leak around fuel injectors

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1985 300SD Leak around fuel injectors

So I'm getting fuel around two injectors (second and third) and I'm kinda a novice at all this so I have a question about what hoses I need.

I decided I'd just start with replacing the fuel hoses and the washer underneath the injectors, both probably need to be replaced anyways as I've practically began the process or replacing everything exposed that is rubber.

I tried looking at pelican parts list of hoses but I honestly am lost on which hoses I need that leads to the injectors and also branches them together.

(Here's a quick link to the page I was looking at... I'm pretty sure I'm at the right place 1985 Mercedes-Benz 300SD Base Sedan - Fuel System - Page 2 )

Your looking for the 7mm diesel fuel return hose.

When you remove the old hose, be careful to not nick the barb fitting or you will continue to have a leak with the new hose. Also, the final section in the rear has a plug. Remove it and install in the new hose.

I wouldn't pull the injectors until you do a return hose replacement. Most of the time, the return hose is the entire problem.

Thank you so much, that's exactly what I needed. And I'll take your advice and wait on pulling the injectors.

If you are going to the trouble of pulling the injectors, contact member on here greazzer to rebuild them. He is fantastic and that way you will have a balanced set...

The rubber lines are likely all you'll need
I get them off the nipples with needle nose pliers. I pinch the sides of the hose

X2 on sending your injectors off to Greazzer. He's done mine on Mutt the Race Truck and they're excellent. Also a nice guy and easy to work with. PM him to set it up.

Dan

Quote:

Originally Posted by ThisIsZane (Post 3708873)

Maybe this will help you ID it with Pelican
The old part# 615-476-03-26 has been replaced by 605-078-05-81
Diesel Return Hose size 3.2 inside diameter X 1.9 mm wall thickness For Diesel Injectors (Sold by the Meter),Brand: Cohline

NAPA Autoparts sells it.
Where to buy fuel return hose VW Rabbits from the 1980s use the same Fuel return hose as Mercedes
http://www.peachparts.com/shopforum/showthread.php?t=238219&highlight=Rabbit
The Thread with the part numbers
http://www.peachparts.com/shopforum/showthread.php?t=210922&highlight=return+line+part+number