quote:Originally posted by Andyuk:
I doubt it'll make any difference to your oil smoke though..... More likely you'll need to investigate valve stem seals/guides, or if you're lucky, intake leak path from the valley to the intake runner (though I'm more familiar with windsor - that may, or may not, be possible with a cleveland).
Kind regards
Andy
Funny you should mention that? As a matter of fact all cars with a pcv valve plumbed directly into the intake manifold for vacuum have the tendancy to siphon oil out of the valve cover.
Some manufacturers have relocated the pcv valves to other portions of the engine for that reason.
There is no other place to locate the valve on the Cleveland except into the valve cover.
My parents had a Granada with a 302 in it. That engine emptied the oil pan on a trip that they took. All 5 quarts.
What I would recommend is that you use some kind of an oil separator in line that has a sight glass in it.
Something like you would use on an air compressor.
That way you would be able to see what is going on at just a glance.
Certainly if you are going to "track" the car at high speed events and/or race it, and still leave the pcv valve connected to the intake manifold you MUST use the separator.
The Cleveland valve covers and head in particular retain about 3 inches of oil in the valve cover to cool the valve springs.
It raises the oil level high enough that even just the 6 inches of vacuum that the intake will pull through the crankcase at WOT will start a siphoning effect.
The glass bowl (see pictures v) creates a separator to break the continuous suction that would be created without it.
You can run open breathers (see picture below v) on the track with the required catch cans but the Cleveland is susceptible to high crankcase pressures and really needs to be positively vented.
Also consider that open breathers loose 25hp because the upper piston ring looses some of it sealing ability unless the crankcase has somewhere in the 6 to 10 inch NEGATIVE flow pressure.