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Wedge TR7/8 small gas cap

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I've never thought about comparing my factory locking cap to the whole big/small thing but if that one is the small cap, then my locking cap must be really small! Weren't the small caps used on the coupes (ie Early cars) and the larger caps used the later cars? Or do I have that back to front?
 
I was wondering that myself. All DHC apparently have the small caps, but by first FHC was a 1979 and it was a small cap. My second FHC was a 1980 and was a large. Maybe by where it was made?
 
my '76 fhc has a large cap, my '81 dhc has a small cap
 
PATR8 said:
I was wondering that myself. All DHC apparently have the small caps, but by first FHC was a 1979 and it was a small cap. My second FHC was a 1980 and was a large. Maybe by where it was made?
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I'm not sure about your particular cars, and I don't have the book in front of me, but as I recall, according to Bill Piggot ( Original TR7/8 ), the change was made with the introduction of the convertible, in order to fit on the rear panel. Apparently the larger fuel opening would interfere with the convertible top fitting, so they reduced the size.

But again, there was so much inconsistency with all of our LBC's, it's often hard to pin many things down to a hard and fast rule.
 
OK, what is up with these gas caps, I was pretty confident I was going to win the one on ebay and I ended up losing it. It sold for close to $40 plus over $10 for shipping. Wonder who that guys uses for shipping?
 
doesn't matter who he uses does it? they can charge what they want.
 
Exactly, and people who need a small gas cap like I woud be willing to pay it.
 
Most of the time the restrictor is placed inside the fuel fill pipe in a press fit manner. They could be 'whacked' down out of the way with a large dowel and a hammer. Emissions testers used to have to check that the restrictor was still in place with a special tool Even a small amount of leaded fuel run through a car with catalytic converters would render the cats inoperable.

This was not what caused the cap change on the wedge though as the restrictor doesn't have anything to do with the fitting of the cap. At least it doesn't on my TR8 that still has the restrictor. /bcforum/images/%%GRAEMLIN_URL%%/wink.gif
 
swift6 said:
Most of the time the restrictor is placed inside the fuel fill pipe in a press fit manner. They could be 'whacked' down out of the way with a large dowel and a hammer. Emissions testers used to have to check that the restrictor was still in place with a special tool Even a small amount of leaded fuel run through a car with catalytic converters would render the cats inoperable.
Click to expand...

Also why a lot of converters had been gutted by someone punching a steel rod through them. /bcforum/images/%%GRAEMLIN_URL%%/shocked.gif
Can't tell how many used cars (pre-owned vehicles) I inspected in the early days of converters that had that done. Especially in rural areas where farmers wanted to fill up at the tank where they kept their tractor fuel.
 
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