Lazy-Ferret
Well-known member
- Joined
- Jun 14, 2012
- Messages
- 5,217
I went to clean my air filter the other day, only to discover that the one way Duckbill valve was missing, so there was this 1" hole right in the bottom of the air intake... Sort of defeats the idea of have the snorkel!!
I went to get a replacement valve, and could not believe the price of these things... £15 to £20 a time... the cheapest I could find was £9 for one from a Massey Ferguson Tractor, but it was 45mm in diameter, and I was not sure I wanted to cut a hole that big in the filter box.
Not only that, but I think the fact that I have a cone filter in the box, and it is quite hard to get it in and out, it catches the valve, so if I did get a new one, it would only be a matter of time before it also died...
So, I put the thinking cap on and found a cheaper and I think better way of doing it...
First off, using aluminium tubes, I made an adaptor, this is 2 tubes that fit inside each other... The end of the larger tube was flanged, to fit in the air box, and the other end has a smaller tube inserted and epoxy'd in place to make an edge for the valve to sit against.
The hole in the air box was enlarged a bit, in order for the pipe to pass through, and it was then epoxy'd into place
Next a small ring was cut off of an other bit of tube, and inserted inside the groove of the valve, to keep it pressed nice and tight against the holder, and the valve was inserted into the adaptor.
It now fits nice and snugly and is protected from below by the extended pipe, and from insertion of the air filter by the flange...
What is the valve you ask.... it's from a breast pump, 4 for £3.99... This would be even easier to do, if you have a lathe.
I went to get a replacement valve, and could not believe the price of these things... £15 to £20 a time... the cheapest I could find was £9 for one from a Massey Ferguson Tractor, but it was 45mm in diameter, and I was not sure I wanted to cut a hole that big in the filter box.
Not only that, but I think the fact that I have a cone filter in the box, and it is quite hard to get it in and out, it catches the valve, so if I did get a new one, it would only be a matter of time before it also died...
So, I put the thinking cap on and found a cheaper and I think better way of doing it...
First off, using aluminium tubes, I made an adaptor, this is 2 tubes that fit inside each other... The end of the larger tube was flanged, to fit in the air box, and the other end has a smaller tube inserted and epoxy'd in place to make an edge for the valve to sit against.
The hole in the air box was enlarged a bit, in order for the pipe to pass through, and it was then epoxy'd into place
Next a small ring was cut off of an other bit of tube, and inserted inside the groove of the valve, to keep it pressed nice and tight against the holder, and the valve was inserted into the adaptor.
It now fits nice and snugly and is protected from below by the extended pipe, and from insertion of the air filter by the flange...
What is the valve you ask.... it's from a breast pump, 4 for £3.99... This would be even easier to do, if you have a lathe.
Nice to take another job off my huge rebuild list and with a tit bit too :lol
