The mechanical fuel pump is not working.   Car has been sitting for 8 years.   I know i need to replace/rebuild the mechanical pump.  After researching have decided to rebuild.  HOWEVER, the pump is surrounded by the air conditioner mount and A/C compressor.  Is it possible to rebuild the pump without taking it off the engine??

The mechanical fuel pump should be at the front of the engine, level with the valve cover. Unless your talking about a belt pulley, I don't really see how your a/c pump is that high. You sure your not confused with the Smog pump?

My car has the same A/C, Yorx I believe.  I replaced my pump and it was a huge pain.  Alternator is in the way of that bracket that holds the compressor.  It's a big job, be careful not to break your inspection light, take it loose and lay it off to the side.

 

Here's mine when I first bought it, the A/C is gone now.

I danced all around your question! sorry.  Read this thread and see what you think about rebuilding on the car, I don't think it's possible but I didn't think I's gonna get that old pump off with all the crap in the way. 

 

http://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/

 

If it's been sitting and you just want to start it I'd slap a cheap electric pump on there and plug off the in and out of the mechanical pump, those left open might create a vacuum leak. 

After having a couple mechanical pumps go bad on my '71 (I had the York AC compressor removal issue, too) I went with an electric pump. I bypassed the leaking mechanical pump and left it in place for decades until I converted to a newer AC system and removed the York mounting bracket.  I then removed the mechanical pump and installed a block off plate in its place.  All is good.

 

If you do plan to rebuild the mechanical pump, remove it from the engine to be able to work on it more efficiently.  You'll also want to replace the old gasket between the fuel pump and the engine to avoid oil leaks.  Can't do that without removing the pump.

Dennis

Edited November 11, 20159 yr by psdenno