ok on my 65 mustang i have a 200 that's not original its a 78 block and a 80 head. the pcv valve is hooked up to the Carb adapt on plate is that the right place?? i have seen pic of it hooked up to the Air Cleaner. makes me wonder if its been wrong all this time. also if the pcv valve is not suppose to hook up there what does? is it just manifold Vacuum? i will take pics tomorrow after work if my explaining it is not enough.
PCV Valve hook up question.
- Thread starter Xargon321
- Start date
The PVC valve mounts to opening at the rear of valve cover, the vacuum hose for it can be hooked up to (in order of the best to less so) to the carb's base, an adapter plate under the carb, or to a manifold sorce. To complete a closed PVC system the breather cap at the front of valve cover has a hose hooked to it going to the base of air cleaner. 
Pictures are worth a thousand words.. So I took a couple this morning before coming to work.
1970 170 from a Maverick
You can see the valve cover breather hooked up to the air cleaner.
And in this picture with the air cleaner off you can follow the PCV hose from the rear of the valve cover up and around the front of the carburator and then to the base of the carb.
And I need to take a look at this motor when I get home, it doesn't look like it has a water/coolant lines that run through the carb/intake adapter.
-ron
1970 170 from a Maverick
You can see the valve cover breather hooked up to the air cleaner.
And in this picture with the air cleaner off you can follow the PCV hose from the rear of the valve cover up and around the front of the carburator and then to the base of the carb.
And I need to take a look at this motor when I get home, it doesn't look like it has a water/coolant lines that run through the carb/intake adapter.
-ron
thanks again that just where my pcv valve is hooked up but it is on the front of my valve cover and my breather it not the type that has a hook up to the air breather. also is there a way to see if its bad? if i plug it the idle drops some and smooths out but other then that dont seem to be any different.
Sounds like you don't have all the right parts. You would want to get the right valve cover and air cleaner to hook it up like the pictures posted by CoupeBoy
A PCV (Positive Crankcase Ventilation System) is a controlled vacuum leak so anytime you open the system the idle is going to change. It does make a difference in how well it works keeping the engine clean inside and that is why the factory designed it that way back in the 1960's. Online look to see if you can find an internal flow path showing the PCV operation. Good luck
What kind of valve cover do you have on your engine???
Is the cover a stock ford stamped steel cover or a cast aluminium cover??
Advise cause if its a cover with no PCV baffles you will need a special baffled pcv grommet so oil splash cannot get into the pcv vacuum hose. Bill
Is the cover a stock ford stamped steel cover or a cast aluminium cover??
Advise cause if its a cover with no PCV baffles you will need a special baffled pcv grommet so oil splash cannot get into the pcv vacuum hose. Bill
Its a stock ford one i assume 78 or so it has a bracket on the drivers side that looks like it was used for a cable throttle or somthing. it if is baffled its not very good because the pcv has oil all over it and the fill cap as well.
Here is a old pic its has not changed.
Here is a old pic its has not changed.
The picture clears up a lot! That valve cover will work right and has a baffle in it. 
you might pickup a new grommet for the PCV valve if it's leaking oil. So is the breather cap hooked up to the air cleaner base?
you might pickup a new grommet for the PCV valve if it's leaking oil. So is the breather cap hooked up to the air cleaner base?it is now as i went out and got a new cap that had a hole for the tube. the pcv grommet is not leaking oil but the pcv valve has oil on the bottom of it when i pull it out of the grommet.
i assume the old one was a original one designed for a road draft tube it has the fomoco sticker on it and everything.
i assume the old one was a original one designed for a road draft tube it has the fomoco sticker on it and everything.
Maybe a combo of different years of parts there (would need to see the date codes for block and head) is 80's late model head and valve cover installed, the late V.C.'s have the PCV valve location reversed from an early style V.C.
Oh boy, may B I shouldn't have asked... just complicatin things. It seems on our 60s, 70s & (early) 80s motors the PCV is just a "breather" (V=venting) or as some 1 here wrote upgrade 4 the down tube sys. It doesn't have a check valve in it, it's just a 'spun' filter material, no? As the I6 propels us down the rd there's alot of flailing around (rotating assembly) and it vents pressure - all the "gaseous material" (meaning not a liquid or a solid, as posed to petrol type 'gas'). Sorry for that description of our marvelous mystery (2 me) machines.
So the manifold vac gives it a lill push and the hoses keep it contained (don't allow external 'gases' entry) as it goes from 'top' & 'front' of motor to 'bottom' & 'back' as it circulates back 2 the beginning? Air cleaner & PCV keep it clean, motor action & carb vac keep it movin?
As the family friend & wencher said "Has it got fire? fuel? air? water?" as he diagnosed our current automotive conundrum - this complicates the "air" prt a lill more...
So the manifold vac gives it a lill push and the hoses keep it contained (don't allow external 'gases' entry) as it goes from 'top' & 'front' of motor to 'bottom' & 'back' as it circulates back 2 the beginning? Air cleaner & PCV keep it clean, motor action & carb vac keep it movin?
As the family friend & wencher said "Has it got fire? fuel? air? water?" as he diagnosed our current automotive conundrum - this complicates the "air" prt a lill more...
I have another question to add to this thread now...
My 1981 cougar 200 was "confirmed" 100% original when I got it from its 1 and only previous owner a few years ago with 30k miles on the clock. Still had original tires, brake pads/shoes
as well as the complete emissions system. As far as I could tell, nothing except the oil and filter had ever been changed before I bought it. The car spent most of its life sitting in a garage and even the full soft vinyl top looked brand new with no marks or fading.
Anyway on to my question/s... The PCV valve is at the front of the valve cover and it runs into the carb mounting base as expected... but there is no breather at the back of the valve cover and no place for a breather to hook up to the air cleaner even if there was one, instead there is only a twist in style sealed oil fill cap. Is this how this car came from the factory?
Should I switch from the sealed oil fill cap to a breather cap? Should I use an open filter style breather cap? Should I use a breather cap with a hose that runs into the air cleaner and either modify my air cleaner or find one that already has the setup for a breather cap with a tube?
What are the advantages/disadvantages of each system?
FYI: The engine is almost completely disassembled right now and the entire emissions system is getting scrapped as most of it wasnt in working order anymore and almost all of the vacuum lines were bad as well. It is being reassembled with only what is absolutely necessary to make it run well with the bare minimum of vacuum lines to keep things simple.
My 1981 cougar 200 was "confirmed" 100% original when I got it from its 1 and only previous owner a few years ago with 30k miles on the clock. Still had original tires, brake pads/shoes
as well as the complete emissions system. As far as I could tell, nothing except the oil and filter had ever been changed before I bought it. The car spent most of its life sitting in a garage and even the full soft vinyl top looked brand new with no marks or fading.Anyway on to my question/s... The PCV valve is at the front of the valve cover and it runs into the carb mounting base as expected... but there is no breather at the back of the valve cover and no place for a breather to hook up to the air cleaner even if there was one, instead there is only a twist in style sealed oil fill cap. Is this how this car came from the factory?
Should I switch from the sealed oil fill cap to a breather cap? Should I use an open filter style breather cap? Should I use a breather cap with a hose that runs into the air cleaner and either modify my air cleaner or find one that already has the setup for a breather cap with a tube?
What are the advantages/disadvantages of each system?
FYI: The engine is almost completely disassembled right now and the entire emissions system is getting scrapped as most of it wasnt in working order anymore and almost all of the vacuum lines were bad as well. It is being reassembled with only what is absolutely necessary to make it run well with the bare minimum of vacuum lines to keep things simple.
On the 3.3 1978 -1980 T and 1981-1982 B code and the last 1983 X-code, the filler cap always has a line to the back of the air cleaner. Std post 1971 Cleveland, Windsor item. The Maverick and Early Bronco system was the old front filler rocker cover.
http://i1215.photobucket.com/albums/cc5 ... G_5189.jpg
http://i1215.photobucket.com/albums/cc5 ... G_5188.jpg
On the front is another line. In 1978, all S-shell Fox T-codes reversed the rocker fittings so the steeper sloping hood could be covered, meaning the aftermarket filler caps would be too tall to fit.
The 1978 on X-shell Fords ( non Fox Granada, Monarch, Versallies) L and C code 250's were the same reversed rocker set up , even though the carb, air cleaners, a/c units and air pumps and exhast system set-up was diferent, although the EGR system, head, ignition and fittings were almost the same.
http://i1215.photobucket.com/albums/cc5 ... G_5189.jpg
http://i1215.photobucket.com/albums/cc5 ... G_5188.jpg
On the front is another line. In 1978, all S-shell Fox T-codes reversed the rocker fittings so the steeper sloping hood could be covered, meaning the aftermarket filler caps would be too tall to fit.
The 1978 on X-shell Fords ( non Fox Granada, Monarch, Versallies) L and C code 250's were the same reversed rocker set up , even though the carb, air cleaners, a/c units and air pumps and exhast system set-up was diferent, although the EGR system, head, ignition and fittings were almost the same.
xctasy":1zxikvba said:
So this brings me back to my question... Should I switch from the sealed oil fill cap to a breather cap? If so, what type should I use, line or no line to the air cleaner?
Also, why doesn't my factory air cleaner have a hook up for a line that would run to a breather cap?
It has hook ups for a few other small vacuum lines but not one for a line to a breather... I also have a 250 I pulled from a '77 Maverick that was set up with a PCV at the front of the valve cover with a line running to the carb base and a breather cap at the back with a line running to the air cleaner, but of course I don't have the air cleaner to use if I went that route with my 200.So what should I do with the PCV system on my 200?
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