What size is the pump inlet? 12 or 14mm?

 

Lift-pump inlet, piston or diaphragm, is 1/4NPT.


Injection-pump inlet is 12MM.

 

Thanks for the catch, guys.

 

i noticed today that on my truck there is a plug in the banjo bolt from the lift pump to the head before the filter does any one else have this?

looks to be 1/8 inch pipe size or so

 

That's the bleed screw. It's metric.

 

so if you wanted you could take it out and run a gauge from there? and i figured it was metric but just wanted to give a hint of the size so everyone would know what i was talking about

 

I went to a local truck shop and bought a new banjo bolt. Drilled and tapped it for 1/8 npt. Doesn't leak. Would have bought one from Geno's, but I was in a hurry, and it's temporary.

 

You can drill and tap it, but there's not a lot of "meat" left when you do that. The tapped banjos have a thicker head so they are not as fragile.

 

Good question...

I'm not much of an engineer regarding mechanical gauges.

But from what i'm gathering there must be sending units and other miscellaneous doo-dads that one must connect into the fuel line in order to read pressure.

I should have payed more attention to the fuel pressure gauge I had in my jeep. And that one went to a sw into my dash.

Would be nice to see how to install fuel pressure gauges with either video or pictures.

Getting lost in the details, but still helpfull.
Need to read more.

Regards
Tom

 

The little metric bleeder bolt that is in the filter-outlet banjo-bolt is tiny, compared to a 1/8NPT fitting, thus standard available gauge fittings are much too large to work.


But, by welding/brazing a standard fitting to the head of the metric bleeder-screw, then drilling a tiny hole through the length of the screw, standard gauge-tubing can then be applied, and the gauge will function.

Or, the bleeder-screw can be discarded, and a standard fitting welded/brazed to the banjo-bolt's head, and the gauge plumbing attached to that.


It is much simpler to just give the seven-bucks for the tapped-banjo-bolt.

 

that tkes all the fun out