Yup. You have leaking prechambers, either at the injector to pre-
chamber seal, or worse, the prechamber to head seal.
The "flange" you see is a threaded fitting that screws into the head
and holds the pre-chambers in place. The injector screws into the
pre-chamber.
Check to see if the bubbles are appearing around the injector body
thread, or around the outside of the pre-chamber retaining ring. If
around the injectors, you nees to pull them and install a new seal
(correctly).
I have this problem on the 300D -- I hope to fix it before my trip to
DC this spring.
Peter
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