[DeTomaso] Oil from PCV

[JDeRyke at aol.com]

In a message dated 6/27/07 2:44:05 PM, pantera at kommevalla.se writes:

<< When starting up the engine after the EFI installation some oil is coming 
thru the PCV valve into the plenum. I have attached the hose from the PCV to a 
connection after the throttle blade and the hose from the other valve cover 
to a connection before the throttle blade. The PCV is working as it should. Is 
there any way to prevent this from happen?  >>

Why have two hoses? The connection AFTER the throttle blade will show high 
vacuum at idle and reduced vacuum as the throttles are opened. The second 
connection will act in reverse- higher vacuum at high rpms and no vacuum at idle. Do 
both hoses suck oil? Do both hoses connect to a PCV? The PCV should be hooked 
to the 'after' hose. 
If a PCV is connected properly and is not in the rocker cover upside-down 
(which is quite possible), excess oil may be coming from one of two sources. 
First, if one of the two small oil drainback ports in the ends of the heads 
is blocked, oil will accumulate to the point of overflow and will go up the 
PCV. This is especially true with a high-volume or high-pressure oil pump, which 
is totally un-necessary for street cars. 
Fix: clean out both drains thoroughly. This can be done with heads mounted in 
the car, by winding in a 5/16" dia screen door spring that will follow the 
s-shape contours of the non-straight drain. The straight drain can be cleared 
with a drill bit if necessary. Note also that any slop cleared by this method 
will fall into the pan to possibly cause further trouble, so change the oil 
afterwards.
If both oil drains in the heads are clear, the oil is likely coming from 
blow-by past the rings and an engine overhaul is your only other recourse. Good 
luck- J DeRyke<BR><BR><BR>**************************************<BR> See what's 
free at http://www.aol.com.</HTML>