2014 F31 N47 2.0 Diesel

[ForumGuru]

Assistance required, please.

I replaced my rocker cover and gasket over the weekend; however, I was unable to get a real part in time, so I opted for a non-genuine alternative.


The engine ran well; but, after about one minute, the second injector began to leak.

Dismantled, cleaned, and reassembled; everything is satisfactory. Subsequently, NO3 began to emit gas. All four were equipped with new washers and were cleaned anyway.

I have now bought authentic bolts and copper washers. I was unaware that the bolts required replacement.

Will the old bolts likely be the source of this issue? I have seen a message in the E series section indicating that O-rings may contribute to this issue. No O-rings are shown on the official OEM website.
Am I missing anything evident, or should I just hope for the best as I re-clean all four fittings, install a fresh set of washers, and torque them with new bolts?

[IrvesBMW]

Did you thoroughly clean the seat within the head?

New bolts are unnecessary since they are regular torque and not TTY. Did you tighten them properly?

[ForumGuru]

Indeed, it is quite clean; I purchased a bore and seat type tool. Subsequently, they were extinguished using bungs inserted into the orifice in the skull. Admittedly, the first impact seemed to reveal an illusion. I did not believe they were stretched, but I read that someone else had a similar issue and was advised to replace the bolts.

I applied a torque of around 26 Nm, since my Sykes wrench is calibrated in increments of 5, but it did not seem sufficiently tight based on my expertise. I am used to using injectors in large cast iron heads that are very tight, using a 12-inch spanner.

[IrvesBMW]

Occasionally, the clamp may not align properly with the injector, resulting in a loose fit.

Apply a jointing torque of 9 Nm, followed by a final torque of 26 Nm. Did you also clear the injector bolt hole, since oil accumulation in that area might produce the symptoms you described during tightening?

[ForumGuru]

I do not own an airline but used a battery-operated blower. I will attempt to remove them with a paper towel while the bungs remain in the base. I am inclined to go with a bash instead of awaiting the bolts, since I may have overlooked something—an easy oversight, I suppose, after a day contending with the intake manifold, among other tasks.

Copper washers should be OK since they have not undergone a heat cycle.


Thank you for your feedback; it is much appreciated.

[ForumGuru]

I was beginning to feel concerned about the non-genuine rocker cover. My consideration was alignment, and the clamps are positioned off the rocker, securing the bolts; if there were a millimeter of discrepancy, something may not be properly seated. I discovered some copper washers that are 0.5mm thicker, but I have not attempted to use them.

[ForumGuru]

Resolved!

Thoroughly cleaned them to the furthest degree. Number 2 remained unsealed. The copper wash was somewhat crushed—more than I am used to.
Restored and adjusted one of the antique items.I am aware that I ought not do, but they have not been in there for an extended period since I performed the chains. Hermetically sealed…not a hint of a breach…


Thank you for your response on the bolts; otherwise, I would have remained uncertain about my first thoughts on them.

France, I am in route.

[Matt865]

I'm pleased you resolved the issue.
I no longer engage in such activities (due to age and disability), but I have prior experience in that regard.

[ForumGuru]

Indeed, there are moments when one regrets initiating the endeavor. The condition of my swirl flaps, however. Relieved that it is finally completed.

[ForumGuru]

😇