Vacuum lines coming out of the fuel pump M38

qualityhardware · Post by **qualityhardware** » Thu Feb 14, 2008 6:42 am

1/4" OD or 3/16" OD?

I think I did it wrong...

Cacti_Ken · Post by **Cacti_Ken** » Thu Feb 14, 2008 3:21 pm

I did mine in 1/4 inch OD. I believe that is correct.
edited: 1/4 in. as coming from the pump.

OKCM38CDN · Post by **OKCM38CDN** » Thu Feb 14, 2008 4:45 pm

Lines out of the fuel pump are 1/4" and then change to 3/16" up at the tee to the distributor... Line to the wipers is also 1/4"

Hope this helps...

qualityhardware · Post by **qualityhardware** » Fri Feb 15, 2008 6:51 am

So the wiper tee is 1/4" on two ends (to fuel/vacuum pump and wipers) and 3/16" on the end going to the distributor with copper tubing?

OKCM38CDN · Post by **OKCM38CDN** » Fri Feb 15, 2008 7:22 am

Almost, it is 1/4" inverted flare on both ends and 1/8" pipe at the tee for the restrictor to the distributor... These fittings are hard to find, I found some and had to special order them at $10 each...

The restrictor is 3/16" inverted flare to 1/8" pipe and should only have a .040" hole in it. This can be made by soldering the hole closed then redrilling with a .040" drill. You can get this fitting at ACE hardware or NAPA... I got lucky went to NAPA several years ago and found some of these that had never been drilled... so I just had to complete the drilling...

Hope this helps...

Post by **wesk** » Fri Feb 15, 2008 10:49 am

All the aforementioned details are more easily viewed and understood on Bob W's vent system page. http://www.cj3a.info/sibling/m38vent/vent.htm

These images are Bob W's.

qualityhardware · Post by **qualityhardware** » Sat Mar 08, 2008 11:04 am

Fellers - thanks for all the help.

Found the inverted flare tee fitting at Fed Hill as well as the right nuts, etc. Had the fittings for the 3/16" vacuum line from the distributor left over from tear down.

Wiper motors work great.

Thanks.