[oldbykerr]

Hello again out there in diesel land.From last forum that I had wrote,I should have asked,do I have to remove the vacum pump to get to the lift pump?. Also can I put a electric pump inline before the lift pump?.Or do I still have to remove the lift pump?. Thanks for all your help.By the way if anybody is interested NAPA has injection pumps going for 431.00 dollars at least that is what I was told.

 

[Joe Mc]

I don't think I had to remove the vacuum pump when I removed mine, but it was 5 years ago. I went in from under the truck.
If you install an electric pump you should remove the old lift pump. You can use a block-off plate from a big block chevy to fill the hole. The problem with leaving the old pump in is that when the diaphragm splits, the electric pump will empty your fuel tank into the oil-pan. This is very bad for the bearings.

 

[sle2115]

Not to mention that the arm can come off the fuel pump and end up in your oil pan, not something you want bouncing around a crankshaft spinning 3000 RPM! /ubbthreads/images/graemlins/smile.gif

 

[big jake]

[ QUOTE ]
Not to mention that the arm can come off the fuel pump and end up in your oil pan, not something you want bouncing around a crankshaft spinning 3000 RPM! /ubbthreads/images/graemlins/smile.gif

[/ QUOTE ]


I have had an arm and some springs in the bottom of my oil pan for over 70K miles, not a problem.


big jake

 

[LongRider]

<font color="green">It has been over ten years since I replaced the lift-pump on my old 6.9.

I did not remove the vacuum-pump.

It seems like the lift-pump went on real easy.

I can't remember the particulars; but, it seems like success depends on just where the cam-shaft lands when the engine is shut down. </font>

 

[Aubrey]

If you install an electric pump, the output pressure rating should be about 6 psi. And yes, you can remove the old mechanical pump easily from underneath. When you install the blockoff plate, some of the plates (like the one I bought) are large enough to ride up on a ridge above the opening on this motor with a resulting oil leak. I had to file off the top side of mine so it would set square on the machined surface and seal well.

 

[sle2115]

[ QUOTE ]
[ QUOTE ]
Not to mention that the arm can come off the fuel pump and end up in your oil pan, not something you want bouncing around a crankshaft spinning 3000 RPM! /ubbthreads/images/graemlins/smile.gif

[/ QUOTE ]


I have had an arm and some springs in the bottom of my oil pan for over 70K miles, not a problem.


big jake

[/ QUOTE ]

It was enough of a problem that Ford wrote a TSB on it! If you go bouncing around, eventually it will get into something. I saw one motor where it was shoved through the side of the oil pan, no real damage done to the engine, but the oil pan puked it's guts out, not something I want to happen 10 miles from the pavement! /ubbthreads/images/graemlins/smile.gif