Vented Cap - Mot Issue?
#1
Posted 04 August 2019 - 06:35 PM
#2
Posted 04 August 2019 - 07:33 PM
#3
Posted 04 August 2019 - 08:47 PM
#4
Posted 04 August 2019 - 08:56 PM
My pickup has a drilled vented fuel cap - it came with it. I am not sure it needs a vented cap but that’s another issue. It’s going for MOT Tuesday and last time someone told me it would fail and lent me a cap - this time I have no spare. Is a drilled vented cap an MOT failure on a 1979 mini 95 with an K1100 engine? TIA for your advice.
K1100 engine, or K110 head on an A series block ?
#5
Posted 05 August 2019 - 07:19 AM
Totally agree with Ethel, it needs a vented cap, but how were the original van/estate caps vented, I don't remember there being a visible hole, they must have vented to the under side of the cap outside the filler neck.
Yes they vent to the underside.
#6
Posted 05 August 2019 - 11:16 AM
Is a drilled vented cap an MOT failure.
Sounds like it. But no pics means we only see what is in our head.
#7
Posted 05 August 2019 - 01:45 PM
Sounds like it. But no pics means we only see what is in our head.Is a drilled vented cap an MOT failure.
Will get one later. Imagine a normal cap with two small holes drilled all the way through from the face to the back.
#8
Posted 05 August 2019 - 01:47 PM
k1100 head on A series block
My pickup has a drilled vented fuel cap - it came with it. I am not sure it needs a vented cap but that’s another issue. It’s going for MOT Tuesday and last time someone told me it would fail and lent me a cap - this time I have no spare. Is a drilled vented cap an MOT failure on a 1979 mini 95 with an K1100 engine? TIA for your advice.
K1100 engine, or K110 head on an A series block ?
#9
Posted 05 August 2019 - 03:58 PM
You can never fail on anything that was legal when your car was made. I'm not a tester but I think the filler cap seal was added for visual inspection a few years back - that's entirely different to how the tank vents.
Inspection:
4. A fuel tank cap/filler neck sealing device:
a. missing
b. does not fasten/close securely:
• by a positive means, and
• such that pressure is not maintained on the sealing arrangement
c. sealing washer torn, deteriorated or missing, or a mounting flange/sealing method defective such that the leakage of fuel is possible
Reasons for failure:
4. A fuel tank cap/filler neck sealing device:
a. missing
b. does not fasten/close securely:
• by a positive means, and
• such that pressure is not maintained on the sealing arrangement
c. sealing washer torn, deteriorated or missing, or a mounting flange/sealing method defective such that the leakage of fuel is possible
Source: http://www.ukmot.com...7.2/Fuel-System
So the cap must seal on the filler neck, even if petrol can pee out of a vent hole in cap if you manage to flip your car on its head.
#10
Posted 05 August 2019 - 05:04 PM
Sounds like it. But no pics means we only see what is in our head.Is a drilled vented cap an MOT failure.
Will get one later. Imagine a normal cap with two small holes drilled all the way through from the face to the back.
That will be a fail if seen.
#11
Posted 05 August 2019 - 06:41 PM
#12
Posted 05 August 2019 - 07:37 PM
Interesting. I’ll let you know how it goes and I’ve got a local lad who can whip a cap down if it fails.
Just get the correct vented type. That will be fine. It is the modifications with drill that will fail it. IF SEEN.
#13
Posted 05 August 2019 - 07:59 PM
Stick a label on the cap (over the hole)
NO UNLEADED PETROL
#14
Posted 06 August 2019 - 06:48 PM
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