Greetings,

If you pull off while twisting slightly the injector bleed lines the injectors unthread counter clockwise using a 27mm socket. Please mind to be careful not to apply sideward pressure to the socket to prevent benting or knocking off one of the bleed nipples.
Insure to remove and replace the injector metal seals between the injector and the head.

Charles

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'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan