Looks like you still have the spring loaded PCV valve going into the block, which is why it doesn't work. either get/make a straight through adaptor or get the older Cortina baffle unit or poke something through the valve to break it.
Also as above one of the catch can outlets should be open to atmosphere noy connected back to the cam cover.
They may be a bit mythical but there's one for sale near me, Kaig if this works ok. Non registered but could be fun as a grass track racer.
Nothing to do with me but I have told him what it is.
Is there something wrong with the sender or is there just a leak at the joint? If the latter and you have the square RH tank then the majority of people had that problem, try the search system on this site and you’ll find a few solutions.
Probably a 5 year old Capri Mk I 1100 I inherited from my father in law. It looked the part, red with black vinyl roof but rotten front wings, and rust appearing in various places. It was so underpowered, brakes were terrible, tiny front disks, didn’t keep it long but can’t remember what happened to it.
Hi John, I had replied to your message, glad you have found Andy though.
Technically the stick on ones are usually illegal as they are supposed to be vertical, I knew someone who was done by a ‘keen’ law enforcer but it must be very rare.
The standard set up with the manifold you have is from the pcv to a connection on the inlet manifold which keeps it nice and simple, works very well. Catch tanks are usually needed when a different carb set up is used. There is a good explanation on Dave Andrews old web site, look at water and oil control. http://www.dvandrews.co.uk/
Ps forget about connecting to the cam cover.
The Sierra arb is much too stiff for any RH, it prevents the suspension working correctly. Going to tie bars/ compression improves the handling no end.
There are 2 sizes of rear brakes, 8” and 9” with different auto adjusting mechanisms. The QH ones you’re looking at are the 9” but are yours 8”? The early Haynes Sierra manual shows both types.
As no one has replied to this yet I expect there may be little experience of using poly. The Oem ones seem to last about 30 years, I’m sure that a bit of flex helps in the ever changing geometry of a semi trailing arm arrangement too.