Hi friends. I need some tech advice from you. I have done some tests in my 1991-350SD, and I am concluding that the the crankshaft of the injection pump either is loose or broke. I removed the fuel pump and while cranking the engine the shaft doesn't move at all. The overhead cam is moving so I belive the timing chain is ok. Is diffficult to ask question about a 350SD because the answer is always, change the rods. The question is, is it difficult to remove the injection pump? Any special tool for that? How about a remanufactured pump? Thanks for reading.

Darrel Hillman
1991-350SD
102K

At repair shop with trained technician the R & R time is around 5.5 hrs & that includes removal of the intake manifold.

A rebuilt exchange unit is the best way to go unless you have a GOOD Bosch diesel pump repair shop there in PR.

You do need special tools to TIME the pump when re-installing.

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I posted the same thread in the diesel discussion, and I managed to remove the pump yesterday. I found that the left-hand screw was at the bottom of the IP timer housing (out of place). It scored the inside housing of the vaccuum pump and a little piece of the cast (3x6 mm) from the IP timer housing broke. So apparently the pump is in good condition, it was loose from the timing gear. Now I have to get all the gaskets, some degreaser to clean the air pipe and put all together. I ordered the locking screw for the pump already. I couldn't find the tool to turn the pump, but I guess I can hold the shaft with a piece of rubber or leather to turn it to the delivery position of #1 cylinder. Should I use Thread Loc-Tite when putting back the left-hand screw? What is a reliable method, without the special electronic tool, to get the engine at 15 degrees ATDC?

Thank you for your advice.

Darrel
1991-350 SD
102K Mi