Injector seals

[C4COUPE SI]

Hi folks
I changed the seals in my 08 1.6 110 hdi the weekend
I used m7 nyloc nuts and new studs as seen from a thread posted on here a while ago
The car runs fine as come down the motorway this morning but when I stopped I got a whiff of exhaust, visually checked when I got to work and there is no fluid leaks from the injectors
I tightened the nuts to 8nm
Is that enough as the nuts offer resistance anyway
Could i go to 10 nm?
And the car sounds a little rattly, louder than before the seals being done
Any help appreciated
Simon

[shtu]

There's a few variations of injkectors\clamps\fixings, so I think the engine code would be needed to be sure on the torque settings. (mine uses a clamp\bolt arrangement, no use to you)

The trick is to get the injector seat clean before refitting the injector. In my case a wire brush and careful scrub was enough, but using a seat facing tool may be the way to go if you've already had problems with leaks. They're not expensive, and it's like valve seat facing really.

[C4COUPE SI]

Mines the DV6TED4 engine with the 2 nut clamp, I made sure each of them were tightened evenly.
All the seats were cleaned with a kit I bought for the job and were spotless when the injectors went back in with ceramic grease
I spent 12 hours doing this job with the intake manifold off and cleaned too all with new seals
I am inclined to tourqe to 10 nm

[C4COUPE SI]

Quick update, tightened the nuts to 9nm this evening, no more whiff of exhaust and quiet like it was before.
The tightening from 8nm to 9nm was nearly a full turn so people beware of shearing the injector studs