My Willys 3A and 3B Community

3A, 3B, DJ Technical Knowledge Base => "Original"-- Technical Questions, Answers, Observations => Topic started by: athawk11 on June 22, 2011, 02:37:25 PM

Title: Vacuum Fuel Pump/ Vacuum Lines
Post by: athawk11 on June 22, 2011, 02:37:25 PM: I have this style fuel pump.

(http://i1195.photobucket.com/albums/aa397/athawk11/fuelpump.jpg)

I want to run steel vacuum lines to the manifold and to the rubber hose that travels through the cowl. ï¿½Is there some type of compression fitting I can add to the straight tubes coming off this pump? ï¿½Is that a bad idea? ï¿½If there are others out there that had this issue, I would like some feedback. ï¿½

All I know is, I don't want to use rubber hosing for the full distance. ï¿½I like the clean look of the steel tubing I have seen others post at the old site.
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: rocketeer on June 22, 2011, 06:36:32 PM: That's the wrong pump for a CJ3A. It will work but isn't correct. The correct pump has the fittings for metal tubing.

(http://thejeephut.com/images/normal/17709.03.jpg)

Larry
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: athawk11 on June 22, 2011, 08:42:51 PM: Hi Larry.
Yah, I know now that it's not the original style pump, but it is a step up from the electric pump I removed. My Willys will never be a show winner. CJ3A tub and chassis. GPW motor. All dressed up like an M38.

Still looking for some ideas for adding steel vacuum lines.
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: rocketeer on June 22, 2011, 09:39:06 PM: In that case make up the steel lines and just use a short piece of rubber hose to connect them at the pump, no fittings necessary at that end.

Also, very important, be sure to install the necessary spacer between the pump and block when installing that fuel pump.

http://walcks4wd.com/fuel/fuel-pumps-kits-spacers/fuel-pump-spacer.html

Larry
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: athawk11 on June 23, 2011, 09:01:59 AM: Hi Larry,

I have thought about the small length of hose as an option. I just thouht the little clamps wouldn't look as nice.

I did install an 1/8" steel spacer. I understand it will help regulate fuel pressure. I don't think this fuel pump would have fit without the spacer. The notch cut into the new front engine plate had to be enlarged slightly to allow enough room for the screws holding the lower part of the vacuum pump together. Without the spacer, I would have had to remove more material from the front plate and may have had an issue getting the timing cover to seal up. There is not much room back in there.

Tim
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: rocketeer on June 23, 2011, 10:19:57 AM: Since it's vacuum lines, clamps aren't necessary as long as it's a snug fit.

Larry
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: jamesr on June 23, 2011, 11:23:03 AM: My new fuelpump was leaking oil. I removed it and found that its mating surface was not machined "flat". I had to hand file the mating surface straight edge flat, then reinstall it. No more leaks. Jim
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: calvinhunt on June 24, 2011, 12:31:49 AM: So typical of the new parts we get these days. We have to finish building them ourselves. Ahh, for the good ol' days.
Title: Re: Vacuum Fuel Pump/ Vacuum Lines
Post by: rocketeer on June 24, 2011, 07:05:44 PM: In the good old days we didn't replace parts, we repaired them. I rebuilt fuel pumps, water pumps, generators, starters, and manually repaired voltage regulators. Sometimes the good old days were good but not so easy. ï¿½:)

Larry