Speaking of the new tank vent....

[engineerofsorts]

My take from the new drawings is that one no longer drill holes in the fuel cap, since you now have sufficient venting, AND having the holes could allow some possibility of water infiltration. Am I correct, oh noted authority on everything? (i.e. Scott)

[RFSchaller]

I managed to get some water in my tank due to careless spraying around the vented cap while washing the plane. Good news: it promptly showed up in the gascolator.

[12vaitor]

I have not seen anything in the tank vent modification docs that would indicate the fuel cap hole is plugged or that the drawings to drill the hole have been modified to eliminate that step. The issue addressed with the tank vent mod was filling the tanks with fuel, not normal operations. I would think that sealing the fuel cap hole would be a good idea to keep water out.

John Salak
RV12 120116

[Hal-san]

When I picked my vent kit up at Vans last month, I ask about the fuel cap and was told by Ken Scott to just dab a little sealer in the hole to keep any water out of the tank.

[Godo]

Originally Posted by Tony_T

12 Fuel Tank Vent Mod (available now).

Hal_san photo recon:

I've ordered both, the "Fuel Tank Vent Mod" and "Fuel Tank Mod" (Moeller gauge), both now enjoying customs clearance...
I was hoping that the little T-1010 hexagonal plate that prevents the fuel tank return line AN832 fitting to not to turn, would be part of the kit. (As seen in 37-2, bottom rigth)

Anyone that has purchased the Mod kit knows if is part of it?

Thanks in advance!

[dick seiders]

I think I'll pass on the vent. I am tired of putting new holes in my tank which has already suffered enough surgery with the mods. If the vent is only for filling w/o spilling well gee whiz the little fuel I have spilled isn't worth the tank rework. If it becomes an SB then probably OK, but I'll put it on my "next tank mod list" for now.
Dick Seiders 120093

[rvbuilder2002]

Originally Posted by dick seiders

If the vent is only for filling w/o spilling well gee whiz the little fuel I have spilled isn't worth the tank rework.

That is one of the two reasons for it.

[dick seiders]

Ok Scott, what's the second reason?
Dick Seiders

[rvbuilder2002]

Sorry, I thought I had mentioned it in this thread (maybe another one?).

It will prevent fuel venting / dribbling on the outside of the fuselage as the result of fuel expansion.

[sonny-m]

I am just wondering what is actually causing the crazing. I have spilled fuel on my rear window a number of times and no crazing. I have used nothing but non-oxiginated 91 octane. Could it be that nasty corn stuff they put in auto fuel that the rear window doesn't like.
Bad day for flying the 12 zero degrees and 30 to 40 MPH winds.
Sonny