The picture shows the idle screw with a chunk of the injector pump's cast aluminum case. There is now an approximately 1/2" gaping hole into the IP's internals. The idle screw (and hence the hole) is in the real case of the IP. That is the case without all the injection lines. Now i know the case can be welded once i get the pump off and the hole cleaned, but are there internals such as seals, orings, ball bearings, etc that would be damaged by the heat generated from the welding. If yes, can the internals be removed before welding without needing specialty IP rebuilding and measuring equipment. At the very least I should seperate the front case from the rear case. BTW, a rebuilt IP is too expensive for the budget and a used one is too risky. I believe this IP is fine except for the hole.

I thought about using JB weld but there is stress on this part from the trottle hitting the idle screw. Furetheremore getting epoxy in the crack will make it much more difficult to weld the aluminum because of contamination.

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1972 450SL
1982 300D Turbo