Does the Haflinger have this?? If so where is it.
See pic below
![Image](http://i42.photobucket.com/albums/e334/gazzz21/Forum%20Posts%20Album/P9080115_zpsb454767a.jpg)
In the pic you can see the brass T junction between the oil filter and the dizzy with the oil pressure switch on top of it. In the base of this where the oil pipe casting that joins the oil pump to the base of the oil filter there is a vertical spring controlled valve/plunger. When the engine starts and the oil pump gets up to pressure, the pressure lifts the plunger and allows oil pressure into the chamber above it (where the brass fitting screws into) to operate the oil pressure switch and in the case of my vehicle oil pressure to the oil pressure gauge. There does not seem to be any other purpose to this pressure valve.
The problem is that when the engine is turned off (or in theory oil pressure lost) the valved closes but pressure seems to remain in the chamber above the spring controlled valve/plunger so that it may take quite a few minutes for the oil pressure light to come on and while you can see pressure dropping on the gauge it also takes a couple of minutes for pressure to fall to zero.
The ramification being that when driving and oil pressure is lost, I do not have immediate indication that oil pressure has been lost.
So does this spring operated valve just allow oil pressure to the oil pressure switch or is there an additional reason for this. If just to provide oil pressure to the switch, then really the valve is not really required.
Advice appreciated.
Cheers
Garry