CAV filter connections - fuel bleeding problem

[spannerman]

There is always a lot of confusion over CAV filter connections, ignore the arrows they are misleading. The fuel must enter via one of the two inlets nearest the mounting bracket (upper connections in the photo in the post), and out via one of the two furthest out ( lower two in the photo), doesn't matter which you use as long as its in at the back, out at the front when you look at the filter housing.
The reason is very simple, the fuel has to flow in and down the hollow center of the filter element past the long bolt so it can dump any dirt or water in the glass bowl where its visible. The fuel then flows up through the element and to one of the outlets.
Any other way is wrong as if the fuel comes in via the outlets the dirt or water will sit on top of the element and you will never know its there until the engine stops.
Look at it next time you change the filter and all will be obvious.
And yes your fuel pump is on the cam so rotate the engine one turn, cam rotates 1/2 a turn.

 

[DaveS]

Spannerman, I don't disagree with anything you're saying, but why are you telling me? It was the OP who raised the connection issue - then effectively answered it himself by posting the very helpful picture that makes all clear.

 

[flyingscampi]

THESE look like an easy add-on to CAV filters

 

[DaveS]

Yes, I had originally thought of fitting one of these: apart from anything else it looks a bit more "professional", but I was put off by a fair bit of negative feedback from posters who had them. I now can't find the thread, but I think it was on this forum 3 or 4 years ago.

 

[jimbouy]

Not sure I understand what you are saying (spannerman) as it seems to totally contradict the markings on the top of the filter?

(sorry for nicking someone elses piccy but I am sure they won't mind)

Which would suggest that the way I have fitted mine is incorrect

Despite my having followed the markings on top the filter.

Oh and for the poster who mentioned the banjo pump from ASAP... I fitted one and it makes priming and bleeding a doddle and has never given me a problem.

Cheers

Jim

 

[Refueler]

Why would CAV go to the trouble of tooling up a cast mould with arrows for us to ignore them ? Surely they know their product ? It's been around for many years and I've never heard anyone previously say ignore them. I reckon the world and his dog has been following those arrows for simple fitting without need to "flow-trace" the internal workings ??

/forums/images/graemlins/confused.gif

 

[jdavey]

CAV filter connections

If you read the CAV manual it states that in order to remove entrained water from fuel, it must be pulled through the filter first to agglomerate, and then settle in the bowl. If you see sediment then this indicates failure of the filter media. I would plumb the filter per the arrows.