Fuel Injectors

[dwilli3038]

Hello All,
 
I found that I have a rusty gas tank problem. Unfortunaly when I did an autopsy on the fuel filter, I found the rust had penitrated it. I am afraid my injectors have some rust particles in them now. Can they be removed and rinsed with WD-40 or some other solvent to clean them or do they need to go to someone with an injector stand?

I also read some where they are mated to each cylinder. Is this correct? Are they marked?


Daryl
'64 230 SL

[ja17]

Hello Daryl,
It is hard to check these without a tester. If there is not an injector tester near by, a  diesel truck service center may have an injector tester. The do-it-yourself alternative is: if you have a spare injector line, unhook one line on your pump and hook the spare line up. Route the line so it can be used as a tester for the injectors. Of course your engine must be running and it will be running on only five cylinders (remember last years tech session). The injectors have a fine cone shaped spray pattern when correct. They also sound off with a distinctive "chirp". Always be careful when working with gasoline (fire hazard). Keep a fire extiguisher close and have plenty of ventilation. Flushing the injectors with WD40 could help. The little cone valve on the end of the injector can be lifted open with your fingernails and then flushed.

Joe Alexander
Blacklick, Ohio

[LFrank]

Aren't there two fuel filters for this car (one in tank, one near engine) If so, which was rusty?

LFrank
Washington DC
65 230 sl
DB334/Hellblau

[Cees Klumper]

The injectors are not specific to the individual cylinders, they are available new and when I replaced mine a few years ago they cost me around $500 for a set of six (in Europe). Always worth wile to have them checked properly before replacing.

[mwtea]

My mechanic tells me that my 250 is in need of new fuel injection lines and nozzles. He took one off to check it and ended up having to replace the nozzle and line due to the fact that the threads had all but rusted away.

A few of questions on this...
Should I be worried about running on one brand new nozzle/line combo and 5 old ones?
Should I suspect something like the fuel filters?
What is involved in changing the other 5 myself?

Thanks!
Mike

[Douglas]

this doesn't answer your question, but i thought i'd add this tidbit -- H&R in NY or pacific in CA, both places known for rebuilding injection pumps, can also clean injectors pretty reasonably. i always keep a spare set so i can swap while one set is being cleaned.

Douglas Kim
New York, NY
#018260

[dwilli3038]

Thanks for all the feedback. It was the second filter, the one closest to the engine that was rusty on both sides of the pleet. I think I will find a day when it is not raining in GA and then try Joe's idea with a fire extingusher handy. I am sure if this does not work there is someone around that has a test stand.

Daryl
'64 230 SL

[Benz Dr.]

Hi, we use an ultrasonic cleaner - something like what a jewelery store would use.

 I didn't know you could pull the little valve open with only your finger nails. When new they run at about 240 PSI or more. Not sure I have nails that srong or not.
Do you use some sort of special nail polish?

regards,
Dan c

Daniel G Caron