Fuel system question re: vapor lock
 

Not sure what it is that's happening but as I drive (then stop)the 66 B20 powered Estate I can see and hear bubbles going through the fuel filter.
I also notice fuel stains on the 1/4 panel from fuel seeping past cap.
I loosened cap and heard a woosh. No more bubbles. At first I thought it was from heating up the fuel line as its pretty close to the block and t-stat housing. Now I have to wonder if I should use the vented fuel inlet I took off
the 68 Estate parts car.
It has a 32/36 Weber carb if that matters.
It does start hard after sitting. Ideas? Thanks in advance!

The fuel cap on an estate should be non vented, otherwise fuel will slosh out. However there is a vent hose connected to the filler pipe behind the trim panel. Make sure it isn't blocked. The tank must have an air vent otherwise it'll vacuum lock.

On a regular 122, should the fuel cap vent? Sometimes my Amazon cuts out at high speeds and I thought that this could be caused by my sealed fuel cap. I also have a carb problem though, but that should be fixed soon.

Also, what is your name? You have been very helpful on this forum, and I appreciate all your comments and posts. Thank you.

I'll double check but I'm pretty sure there was not any vent on this 66.
For sure there was on the 68. I just found it and was surprised.
I did have the tank and pipe out of the 66 when I resealed the tank.

A saloon vents through the cap. If it lacks the vent then eventually the car will stop because the fuel tank can't overcome the vacuum that gets created in the tank.

I'm Peter

Just getting around to this vent work. I'll add the vent from the 68 Estate to my 66. I am trying to recall was it a filtered vent or what? In case I dont find the old 68 stuff because of the mess in my garage.
If I mod the 66 filler should I look for a particular vent (filter).
Anyone have pictures?

I believe it comes off the filler-tube upwards, and then attaches to a rubber hose, which just goes up, hangs off something or another, then through a hole in the bottom of the rear quarter. Not exactly a simple add-on, I'd be looking for a fuel-cap that vents. Heck, mine might even be a vented one, it is a locking cap. Anyone know if those are vented? I have the original one, painted, and since I won't be living in NY anymore, shouldn't need it. It doesn't look right on an estate anyways.

DON'T fit a vented cap to an estate!!!! Every time you go round a right hand corner, fuel will slosh out due to the low angle of the filler pipe*. The factory style vent is simply a fitting on the filler pipe for the rubber hose that is described above. Can't believe it would be difficult to replicate.

*Even with the proper sealed cap, when parked with a full tank & the filler to the kerb, just road camber can be enough for fuel to spill out of the filler cap on a hot day as the air on the other side of the tank expands.

I happen to be messing about in the boot of my estate and saw this vent pipe, i will be putting the trim back tomorrow but before I do I will take a pic for you

Tom

Thanks Tom,
I cleaned up the 68 vent w/nipple. Found it last night. Its not raining here now so I've been out in the yard. I'd love to see the routing and where the exit hole is as I really think the 66 does not/did not have this.

Brad