Mercedes-Benz Forum banner
1 - 19 of 19 Posts

·
Registered
1987 560SL midnight blue on grey; 2003 20th AE Volkswagen GTI Imola Yellow;
Joined
·
27 Posts
Discussion Starter · #1 ·
Hi all,
after draining the gas tank and dismantling the whole fuel delivery cluster, i found out one of my fuel pumps is stuck and had black sludge in it (intake part). it hums when i hooked it up with a battery charger but wont turn. the check valve is a bit rusted. the secondary pump is clean and works pefectly.

my question is, is the pump salvageable? if I clean it good enough, lil tapping, do I have the chance of getting it unstuck? or should I fork over the $$ and get a new one.

( i dont have an idea what the nature of the sludge is, car sat for a while with barely any gas.)

pics:



thanks!
 

·
Outstanding Contributor , Bob's Your Uncle!
83 280 SL- 5 speed-The PIG
Joined
·
32,177 Posts
That's pretty gross.
You could reverse the polarity on the pump and run it backwards...maybe running fresh gas as a solvent. What have you got to lose?
I, myself, as an experiment, would try to save it.
 

·
Registered
1959 220S cabriolet, 1983 240D original owner, 1999 E300 turbo diesel, 1988 560SL, 2003 SLK320
Joined
·
3,513 Posts
Hook it up backwards and run diesel through it not gasoline. I've got the text of the procedure if you want to try it. Contact me offlist.

Len
[email protected]
 

·
Registered
2017 Police Interceptor Utility, 2017 Police Interceptor Sedan
Joined
·
7,750 Posts
Just replace it, it's not like they're that expensive.
 

·
Always Remembered RIP
1973 450 SLC AMG, 1995 Chevy Tahoe
Joined
·
3,381 Posts
Eeeeeewwwww go new.
 

·
Registered
1981 380SL - Lorinser bodykit w/16x7 LOs - AKA "Frau Blau"(Lady Blue)
Joined
·
7,563 Posts
I am liking Knobby's idea. Pull it apart, it won't hurt anything to do it and might learn that it is repairable/rebuildable. If not, there is always new.
Bandit
 

·
Outstanding Contributor , Bob's Your Uncle!
83 280 SL- 5 speed-The PIG
Joined
·
32,177 Posts
Hook it up backwards and run diesel through it not gasoline. I've got the text of the procedure if you want to try it. Contact me offlist.

Len
[email protected]
Why diesel? I've heard that but never understood.
Gas is a much better solvent for that tar.
 

·
Registered
1981 380SL - Lorinser bodykit w/16x7 LOs - AKA "Frau Blau"(Lady Blue)
Joined
·
7,563 Posts

·
Registered
1978 280slc
Joined
·
3,203 Posts
I'd fill it with solvent and use a vibratory mixure to dislodge the gunk. I'd also to it outside just in case.
 

·
Registered
1987 560SL midnight blue on grey; 2003 20th AE Volkswagen GTI Imola Yellow;
Joined
·
27 Posts
Discussion Starter · #12 ·
'was able to take it apart without using a saw. ill post pics later
 

·
Registered
1959 220S cabriolet, 1983 240D original owner, 1999 E300 turbo diesel, 1988 560SL, 2003 SLK320
Joined
·
3,513 Posts
Why diesel? I've heard that but never understood.
Gas is a much better solvent for that tar.

Yes, a safety issue. If you use gasoline, you will probably only do it once. :)

Len
 

·
Registered
1981 380SL - Lorinser bodykit w/16x7 LOs - AKA "Frau Blau"(Lady Blue)
Joined
·
7,563 Posts
COOL!
 

·
Registered
1959 220S cabriolet, 1983 240D original owner, 1999 E300 turbo diesel, 1988 560SL, 2003 SLK320
Joined
·
3,513 Posts
1 - 19 of 19 Posts
Top