Author Topic: Injection pump check valves?  (Read 786 times)

twistedtree

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Injection pump check valves?
« on: March 01, 2025, 20:09:10 »
I am working on an R22Y injection pump that isn't pumping.  The car has been sitting for a long time, and I expect things are just gummed up inside.  I checked the rack and it moved freely, which I think means the pistons are free?

Anyway, I pulled off the 19mm pipe adapters expecting to find a plunger and spring for the check valve, and instead I find something similar to this picture.  Thankfully mine are not rusted up like in the picture.

Does this mean parts are missing?  That seems so unlikely, but you never know.   Or do I need to pull these devices and the plunger and check valve parts are inside?
1964 MB 230SL
1970 MB 280SL
2023 BMW x3

BobH

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« Last Edit: March 02, 2025, 14:56:31 by BobH »
February 1965 230SL Automatic
UK delivered RHD
Papyrus white, blue hard top & hub caps
Blue soft top
Blue leather