Torque for the injector bolts on CDI

[miggit]

I know the answer is 7nm +90+90 , but I have a Mercedes engined Jeep (OM642) and the Chrysler manual says 7nm and 180... is that pushing it a bit, or is it ok to just get all the stretching done in one go?

Also I've just realised that I have no ceramic grease... how important is it?

Toolstation sell some ceramic grease that is rated at -20 to 1500c the MB stuff is I believe -30 to 1400c, do you think this would suffice?

 

[alabbasi]

grease is used for its anti seize ability. Can you sub for regular anti seize grease? It's got to be better than nothing.

 

[miggit]

I was hoping it would be something like that, and not some magical yaks milk ingredient !

I'm not worried about it only being rated to -20 instead of -30... I live in the UK not Alaska

 

[m80]

Some ignore the 2nd 90 degrees, saying the stretch bolt has already stretched as it should.
For me I do the 1st 90 and apply the pressure for the 2nd but chicken out if I judge it's too much. More often I do 60 / 70 degrees.

 

[miggit]

Yup that sounds like me too.. I've had no end of problems with my 270CDI which has ended up in inserts in all bolt holes... But I can't remember a day without black death either... so I'm rather keen not to get it wrong on the new toy... I've pulled the injectors long before the seals gave out... Mainly because it was doing impressions of a Navy Destroyer... make smoke number one!
5 out of 6 were dripping (cause of smoke) and the other had a knackered valve.... so I've had them all rebuilt!

 

[Sicario]

Always buy new bolts, they snap soooooooooooooooo easy, if it snaps its £100 (each) to have it drilled out, an insert put in and a new thicker bolt