Stuck Oil Cap?

I suppose this isn't particularly 'technical' but I can't get the damn thing off!!

I've only had the bike a month and I'm not even trying to change the oil, it's fine.

I just wanted to swap over my oil cap for a different one that's all. I've tried using a 50 pence piece to undo the oil cap but when that didn't work I went for a fairly chuncky flat head screwdriver. That wouldn't budge it either the bikes cold by the way and not been used for a couple days.

Any tips for loosening this thing??

 

Thank you all for your replies

What have I learnt? I need some mole grips!

Without them I tried a wrench but that wouldn't open wide enough so then I tried a big pair of pliers but they wouldn't open wide enough either

Ended up going back to the 50p piece and holding it with a pair of pliers, then putting it in the slot on the oil cap and giving it a few light taps with a hammer. Still holding the coin with the pliers I tried turning it. I didn't think it would budge as the coin was bending but eventually it moved enough for me to then be able to turn it freely that cost me 50p



However when I tried to put the new oil cap in it wouldn't go bought from square deals.co.uk and advertised as a direct swap for the Thruxton, Scrambler and Bonnie but I'm telling you it doesn't fit.

It goes in and catches the first bit of thread but won't turn more than half a turn or so before it feels like it locks up. I don't want to force it through fear it won't come out. Comparing the two the depth of thread on the new piece (top) looks ever so slightly bigger compared to the original.



Pop the original cap back in and it moves either way completely freely. So the new part will have to be returned.

Disappointing because I quite like it ...

 

There isn't any red stuff?

I think the red that you see around the edge of the oil cap in the picture is just the reflection of the red side panel/tank. At least I hope so anyway

 

Yeah the cap is far to wide. I think it's like 10" as my 8" wrench would fit around it I tried a couple of screwdriver bits but they get swallowed up.

 

Is the O ring the rubbery ring? If so it was there it just wasn't on the thing when I took the picture. Think I'd taken it off the original piece to see if it fit the new cap.

 

I'll try that before I totally give up on it, would rather not have to send it back and all ...

 

Thanks. I've just measured with some callipers.

The outside diameter of both is the same and the thread angle looks about right. However I've measured the distance between the thread and space between the thread on the original cap looks to be about .3mm where as on the new cap it looks closer to .4mm

I don't think oiling the new cap will help to be honest. Just tried again and although it initially catches the thread inside the casing it seizes up after less than half a turn by hand. It's not right.

I'll obviously make squaredeals aware of this when I return the item, just not sure whether to order a direct replacement and risk it being the same or try something else ...

 

Hmm I reckon it'll look better when it's in front of me. Just looks like it 'sticks' out quite a lot in the picture. Not to fond of what else they have on Squaredeals though to be honest, everything else looks much the same as the original.

 

Ha! That's what I was worried about!

 

Sorry it'll be my bad understanding of what all the bits and pieces are called.

I meant the variation occurs between these points. It's slightly bigger on the new cap and yep the original cap screws in/out perfectly.



I'll ask square deals for a replacement and if it's the same again I'll go with Dozers suggestion