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Topic: Valve cover (Read 1858 times) previous topic - next topic

Valve cover

Reply #15 –
Yeh but my pcv is in the bottom intake.I was wondering if I was suckin oil out to the tb.from the cover.It's more of a ? than a problem.Maybe to see what others have done.I had this ? for days no one wanted to answer till I brought it back up.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

Valve cover

Reply #16 –
Questiong and problems get lost in other threads sometimes. Sorry about that bro

Valve cover

Reply #17 –
Theres no need for apology.This is where people learn.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

Valve cover

Reply #18 –
Quote from: kitzdnm;130118
Yeh but my pcv is in the bottom intake.I was wondering if I was suckin oil out to the tb.from the cover.It's more of a ? than a problem.Maybe to see what others have done.I had this ? for days no one wanted to answer till I brought it back up.


You dont quite understand how the PCV system works. The PCV valve is located in a place where it can suck air from the crankcase. In a 5.0, it in the lower intake. It sucks air from the lifter valley, which has airflow access to the crank case. Generally, when the engine is at low throttle and mid throttle, the PCV is open, and sucking air, keeping fresh air in the crank case, helping keep the oil from foaming, and helping keep the rings seated. This fresh air comes through the throttle body, to the valve cover, through the heads, and into the crankcase, which then it gets sucked into the intake manifold. It keeps fresh air going through the crankcase, while not creating a vacume leak.

The issue is with moderate and WOT, the PCV valve closes, and the only area that creates suction for the crankcase is the throttle body. Since the rockers sling oil around, and you have no baffle in the intake manifold, youre getting oil in your throttle body. If you ran a baffle, a catch can, or maybe even a little fuel filter, you wont have issues.

Keep in mind with the filter, if it gets saturated, it wont flow for shiznit.
It's Gumby's fault.

Valve cover

Reply #19 –
Nice write up.But what baffle in the intake are you talkin about/
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

Valve cover

Reply #20 –
By the way I do understand  positive crank preasure.
Not to be an Idiot I was wondering if there was a better way.
Read your own words when WOT the valve closes?,then what?
suck it does>TB.It's not a problem I can see but more of a ?
So far I don't see a real answer.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

Valve cover

Reply #21 –
Quote from: kitzdnm;130146
By the way I do understand  positive crank preasure.
Not to be an Idiot I was wondering if there was a better way.
Read your own words when WOT the valve closes?,then what?
suck it does>TB.It's not a problem I can see but more of a ?
So far I don't see a real answer.


At WOT, the PCV valve closes, and it uses the suction from the throttle body to relieve the pressure, and create vacume in the crankcase.

Baffle in the intake? I was refering to the baffle in the valve covers. If you take your stock valve covers, flip them over, youll see a baffle under the oil fill tube. Thats to keep oil from slinging up to where it can get sucked up by the throttle body.
It's Gumby's fault.