crankcase ventilation

Jon · Post by **Jon** » Sun Aug 29, 04 12:05 pm

my mild street/strip 493 is going through oil like it is going out of fashion, it seems to be blowing out of the rocker cover breathers as its all over the engine bay, its worse on long motorway journeys, cruising at 70+mph theres 2 breathers in each cover
what do you think?
would a pcv set up work better?

Anonymous · Post by **Anonymous** » Sun Aug 29, 04 12:27 pm

i would never run a car WITHOUT a pcv system. Also i think another problem can be if you are using aftermarket (esp cheapo) rocker covers they do not have the baffles etc to stop oil spraying out of the hole.

fit a pcv to one rocker cover ,and a filterd breather cap to the other, and it should at least top the inside of your engine catching black death

Jon · Post by **Jon** » Mon Aug 30, 04 2:20 pm

yeah thats more or less what I had in mind
put a pcv valve in one side and block the other breather
then leave the other side with 2 breathers
I wouldn't call those indy rocker covers cheapo!

Dave-R · Post by **Dave-R** » Mon Aug 30, 04 5:14 pm

Put the valve on the drivers side. You might be better with just the one breather on the other side. That way you get a nice flow of air moving through the breather which will help drive the oil back. Make sure there is a baffle under the breather and valve and hamer the edges over so they come close to the inside surface of the valve cover.

If your piston rings are worn or the pistons a loose fit (forged?) the problem will be worse.

Jon · Post by **Jon** » Mon Aug 30, 04 5:26 pm

OK thanks
Cant hammer the baffles over in the covers as they're welded in along the full length but I'll give it a try with just the one breather on the passenger side
might be able to go back to having a white engine bay then

db · Post by db » Wed Sep 01, 04 9:19 am

Now PCV is something which i always think i understand but now i'm thinking about it i'm not so sure- do you run a pipe with a 1-way valve to the inlet manifold?