my problem with the pcv valve has now annoyed me beyond belief.
The valve spring is so loose that it opens and closes at will.

I planned on removeing it and blocking the hole but upon further investigation this in theory can lead to more oil burning as the back pressure at high revs on the sealed sytem reduces oil burning.

The dilemma is should i run the risk of running no pcv vale to reduce any chances of detonation or replace with one that may work (they have a life span of apporx 40,000 miles apparently).

If blocking will just run oil catch can (not a coke bollte 1200rc)

any experiences from doing this would be appreciated.

Definately put one in that works. Dont bother trying to block it off. I did when I first put my new engine in and it was a pain in the ass. You could see the capour and stuff coming out of the block pipe even though I had it facing the ground + you could smell it. Also the line that goes into the aircleaner. Oil was pumping up it. In small doses but it didnt look clean inside the air filter element.

It just wasnt worth the hassle. I noticed no difference in performance or idle ect when I put it back in. There just didnt seem to be any other effective way to ventilate the engine properly.

New PCV valves are still available, and quite cheap. Definately worth keeping installed.

Don't be a friggen tightass.

Get down to the wreckers.. most will give you one for free.

Sort it out....

i've yet to see a twin weber manifold with provision for a pcv valve,maybe some factory setups,but nothing aftermarket.the pcv lets fumes from the crankcase enter the inlet manifold,so blocking the pcv isn't going to raise the pressure in the crankcase unless you block
off the pipe coming out of the block.this pipe is usually vented to a catch tank,along with the breather off the rocker cover.BUT,i always thought the pcv valve was required for road registration.so,buy a new one or get a good one from a wreckers & replace the one you've got in the car.i once traced the dreaded rattling coming from the engine in one of my 1200's to a dud pcv valve,it quickly got an aerial trip to the bin.

dont want to block it to be a tight ass, just have some people that bloch the vavle to the inlet manifold part and vent the crankcase externally and a couple run oil air seperators...... dont know which way to go.....
might just try and find the part number for the stoc pcv and try it before going any further witht he idea of blocking it.

Try to get rid of a problem, not being a tight wad as i usually am

i went to supercheap and got one for about 7 bucks...

a little off topic but can someone tell me the legalities of catch cans?
im running twin webers that have nowhere to put pcv, plus a turbo and dont want all that muck in my turbo, and have made a catch can, but can it be engineered with a catch can or will i have to hook up a dodgy one? also while im at it, thinking that a few ppl with catch cans have blow off valves, are these engineereable as well? like will an engineer make me weld the pipe or will i get away with having a block bov flange?????

I believe they aren't legal for the same reason that externally vented blow off valves aren't - they change the emissions. But having said that my car was engineer approved with the catch can in place.
Matty

thats ####in stupid, i dunno how they can say that filtered air coming out a blow off valve is changing the emissions, i can sorta see with the pcv but surely if youve got crankcase fumes being burnt then they are making the emissions worse than not having them in the exhaust ??? think its time for another trip to the engineers .....