jbg
02-03-2010, 04:03 AM
I've been collecting some injectors from diesels at the local pick-n-pull so I can rebuild them and swap into the car for minimal downtime. Due to the scarcity of VW indirect-injected diesels I have been sourcing parts from Mercedes Benz vehicles.
My plan was to replace the nozzles with the appropriate part, pop test, and shim as necessary. I have noted that several of the injectors I have gotten are shorter then a D24T-specific injector I have as a reference. These came out of turbo and non-turbo 4 and 5-cylinder engines -- what was available at the time.
http://lh4.ggpht.com/_us_UfRPp6DM/S2jl15bIPFI/AAAAAAAAAh8/MedfYsxfKPk/s640/IMG_4880.JPG
Note the difference in height. The injector on the left is from a turbo Mercedes, it is the same dimensions as that of VW/D24(T). On the right is the non-turbo injector. The non-turbo injectors have a breaking pressure of 135 bar as noted on the body.
http://lh3.ggpht.com/_us_UfRPp6DM/S2jmAsdEraI/AAAAAAAAAiA/d636Cjp1Czw/s640/IMG_4886.JPG
Note the measurement with my cheap Harbor Freight caliper, this is the turbo MB (same dimensions as VW/D24(T)).
http://lh4.ggpht.com/_us_UfRPp6DM/S2jmNuFdlDI/AAAAAAAAAiE/zEKmP7GTmfI/s640/IMG_4888.JPG
Measurement of the non-turbo injector.
Even the hardware inside them is different. The smaller non-turbo injectors have longer springs and shorter spring seats (three on the right):
http://lh4.ggpht.com/_us_UfRPp6DM/S2jlk6ckcAI/AAAAAAAAAh0/JKddjPzp10U/s640/IMG_4891.JPG
Any comments from the collective? I assume I can use the shorter units. As long as they pop to my specification, and they have the VW nozzles, I assume things will be fine.
My plan was to replace the nozzles with the appropriate part, pop test, and shim as necessary. I have noted that several of the injectors I have gotten are shorter then a D24T-specific injector I have as a reference. These came out of turbo and non-turbo 4 and 5-cylinder engines -- what was available at the time.
http://lh4.ggpht.com/_us_UfRPp6DM/S2jl15bIPFI/AAAAAAAAAh8/MedfYsxfKPk/s640/IMG_4880.JPG
Note the difference in height. The injector on the left is from a turbo Mercedes, it is the same dimensions as that of VW/D24(T). On the right is the non-turbo injector. The non-turbo injectors have a breaking pressure of 135 bar as noted on the body.
http://lh3.ggpht.com/_us_UfRPp6DM/S2jmAsdEraI/AAAAAAAAAiA/d636Cjp1Czw/s640/IMG_4886.JPG
Note the measurement with my cheap Harbor Freight caliper, this is the turbo MB (same dimensions as VW/D24(T)).
http://lh4.ggpht.com/_us_UfRPp6DM/S2jmNuFdlDI/AAAAAAAAAiE/zEKmP7GTmfI/s640/IMG_4888.JPG
Measurement of the non-turbo injector.
Even the hardware inside them is different. The smaller non-turbo injectors have longer springs and shorter spring seats (three on the right):
http://lh4.ggpht.com/_us_UfRPp6DM/S2jlk6ckcAI/AAAAAAAAAh0/JKddjPzp10U/s640/IMG_4891.JPG
Any comments from the collective? I assume I can use the shorter units. As long as they pop to my specification, and they have the VW nozzles, I assume things will be fine.