I pulled these injectors from an 83 300D, KCA30S35/4 349 135bar. Just want to know what the # 349 means. Ive heard of 240, 250, 350. Im going to use these injectors as replacement while the original ones gets tested. Whats the # 349?

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

I have 2 Bosch books ; one on Distributor type pumps and one on Inline type fuel injection pumps and the both have the same chart: Bosch type designation codes for nozzle holders.
K= Nozzle holder
B= Attached by flange or clamp
A=Spring at bottom Nozzle-Holder dia. 17mm (type P nozzle), Dia. 25mm (type S nozzle)
After that it is harder to understand
3=no letter= Short nozzle collar
0=No letter=One inlet passage
S=Nozzle (collar dia. 17mm)
35= Length (mm)
From that point on after S the chart is no match for the numbers on the injector. The chart goes on to say V= Test holder if No letter= Standard Nozzle holder; afterwhich is the Ser.No; or there could be the last 7 digits of the drawing number.

Nothing in that number indicates which engine the Injector would go into or even the number of the Spray Nozzle that goes into that injector body.
The most relevant number stamped on the injector is the 135bar which is the approximate opening/pop pressure the Injector is set at.
The other thing you would need to know is the number that is stamped on the Spray Nozzle; but you can not see this without taking the Injector apart and looking at it.

Unless some one had previously messed with them both the 83 and the 85 have the same Spray Nozzles and opening pressure.

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84 300D, 82 Volvo 244Gl Diesel