Fuel Tank Caps

[Corsair613]

I'm getting ready to install my fuel tank caps and, naturally, have some questions:

• Cork washers used (either or both) or discarded? I've seen references to each way.
• Funnel set in the recess from above or attached from underneath? I've seen references to each way.
• Vent spigots pointing which way and attached to what hoses? If those hoses were included, I've yet to find them.
• Are most people aligning the Ultima name perpendicular to the car's longitudinal axis (as shown in the manual) or parallel and facing outwards. Seems as though it would be more legible this way.

Ken

[mt308]

Corsair613 said:

I'm getting ready to install my fuel tank caps and, naturally, have some questions:

• Cork washers used (either or both) or discarded? I've seen references to each way.
• Funnel set in the recess from above or attached from underneath? I've seen references to each way.
• Vent spigots pointing which way and attached to what hoses? If those hoses were included, I've yet to find them.
• Are most people aligning the Ultima name perpendicular to the car's longitudinal axis (as shown in the manual) or parallel and facing outwards. Seems as though it would be more legible this way.

Ken

From memory-
Yes to cork washers
I think the whole unit is fitted from above, sitting on top of the cork washer. Memory a little hazy on that though.
I have my vent spigots pointing roughly back. No vent pipes were supplied and I didn't fit any initially for IVA. However I have now fitted as there was quite a smell of fuel in the car. This cured it. I ran my pipes down to a lower chassis rail.
I have the logo so it points forward - ie it is read from standing at the front of the car. I think it looks "right" but others may have chosen your method.

Mark

[barriejames]

Just fitted mine, used both cork washers above and below

If you use both cork washers you can only install funnel from below (I Have just cap assembly and cork washer on top)

No vent hose supplied will fit my own

I fitted spigots so I could get to them once installed (not pointing towards the front of the car)

If you fit the logos that way the cap does reverse 180 degrees so you can then choose which way around you want the logo

Edited by barriejames on Wednesday 29th July 18:11

[Corsair613]

So, you fit the funnels from below?

From the top down: black cap, cork washer, GRP, cork washer, funnel?

Ken

[barriejames]

yep that's what I did, you might find if you fitted from above the cap would be raised from the bodywork, plus your fixings would only tighten onto the fibreglass body, it just seemed to work that way.

[Corsair613]

Makes sense to me; that's what I'll do. Thanks!

Ken

[Corsair613]

In the interest of thoroughness (and my obsession for detail), I ran this by the factory. Their answer, received this morning, was that everything sits above the body:

Cap
Cork washer
Funnel
Cork washer
Body

I suspected that it might be this way after setting a cap and cork washer in place and discovering that the combination sat a fair bit below flush with the body.

Ken

[UltimaFAN]

I tried both solutions during the preparation of the center body section and reached the same configuration than the one adviced by the factory. With everything on top of the body, the cap are at the same level than the body surface. If I put the body in the middle, the cap was lower and it was an issue for me that the GRP/gelcoat could be in contact with the fuel or the fumes.

Concerning the Ultima logo, I just followed the user manual.