removing fuel injectors question

[dirkbalter]

Hi,
here are the torques for a 280SL.
...WRe

Uhh, I guess I didn't look long enough. I this the "flipp book" BBB? I was also looking for the torque values for the copper nuts, mounting intake and exhaust manifold?
(Sorry for high-jacking the post.) 

[wwheeler]

The figures I had posted previously were a bit lighter than what is in the manual. But the point being is that the torque for the fuel line nut must be lower than the injector. It shows to be 25Nm (18ft lb). That should give you enough of a torque differential so that the fuel line nut loosens before the injector itself.

[WRe]

Hi Dirk,
I couldn't find any torques values for these copper nuts in some workshop manuals but found a recommendation because of size and type of these nuts saying 25Nm should be alright.
...WRe

[dirkbalter]

Hi Dirk,
I couldn't find any torques values for these copper nuts in some workshop manuals but found a recommendation because of size and type of these nuts saying 25Nm should be alright.
...WRe

WRe,
Perfect, thanks

[Pawel66]

I am not entitled to add my 2 cents here due to limited experience, but I did this job several times and it is to me like snagging a spark plug: you feel when the seal resistance starts, then you compress it a bit...

[dirkbalter]

PaweL,
I used to do the same until I screwed up an alum BMW motorcycle cyl head. After that, I try to use torque settings or wrenches as much as possible.
As they say in Germany: "Nach fest kommt ab".   

[WRe]

Hi,
I used to do it as most of us did it over the years that is to say without a torque wrench and a lot of feeling.
First time I used a torque wrench I allways got frightend because of this loud click where you never knew if it was the screw or the wrench.
The first cylinder head bolt I tear off was with a torque wrench.
...WRe

[Pawel66]

PaweL,
I used to do the same until I screwed up an alum BMW motorcycle cyl head. After that, I try to use torque settings or wrenches as much as possible.
As they say in Germany: "Nach fest kommt ab".   

Very true ! All that is ahead of me!

WRe experience confirms reaching targets with minimum effort makes sense .

[lurtch]

Hello,

    If your injectors are as corroded as they seem to be, its also likely that there is some of the same  scale deposits down inside at the pintle end as well. I would recommend bench checking them all as I did with this test rig I bought and adapted.
It allowed me to visually check the spray pattern and cracking pressure on each one of them.

Larry in CA

[yves]

After cleaning  ( diagnostic one injector dripping at a low pressure) by myself with the mercedessource kit and checking by a specialist , i have now 6 beautiful injector on the bench....
I have a question before refitting them on the engine:
do i need some grease on the threads
injector // head
injector // fuel pipe
I think copper grease would be correct  but i need confirmation  ....! 

[FGN59]

Hello Yves,

From one Frenchman to another, where did you gave the injectors tested / cleaned ?

Thank you

[yves]

SLS Eurotrading  (03 88 82 70 52 )  they charged 60 eur for 1 inj . they are quite reactive  : 10 days mailing included !
I am refitting them this afternoon .... and am raring to drive and test  with the new gear levers bushes fitted in the same time 

[wwheeler]

The best is a Nickle based anti-seize. Use a tiny amount on injector threads and then on fuel line fitting.