buttoning up new build, PCV and crankcase vent question
#1
buttoning up new build, PCV and crankcase vent question
Trying to put a bow on my 455 build and I want to ensure I do the crank case venting correctly.
Engine is a 455, Sniper EFI, OAI air cleaner setup.
I assume I need to do the following:
Driver side - use crank case vent filter (See image) - put PCV valve in that, and then run vacuum line to manifold vacuum
Pass side - use crank case vent filter (see image) and run hose to air cleaner base and use filter (see image)
OR
Pass Side - just use a valve cover vent filter (K&N, Morroso, Etc.)
Engine is new, only run about 20 min so far and have the expected initial blow by/ring seating smoke from the breather on both valve covers so it triggered me to remember to get this setup correctly
Engine is a 455, Sniper EFI, OAI air cleaner setup.
I assume I need to do the following:
Driver side - use crank case vent filter (See image) - put PCV valve in that, and then run vacuum line to manifold vacuum
Pass side - use crank case vent filter (see image) and run hose to air cleaner base and use filter (see image)
OR
Pass Side - just use a valve cover vent filter (K&N, Morroso, Etc.)
Engine is new, only run about 20 min so far and have the expected initial blow by/ring seating smoke from the breather on both valve covers so it triggered me to remember to get this setup correctly
#2
Norm - its a 72, no longer using the charcoal cannister. Yes using the Tans vacuum( I have a TH400).
** I do see I can use what my 350 had, a rubber grommet and a vent "pipe" to the OAI air cleaner. I just wasn't sure since the car didn't have a 455 when I got it.
My goals is not not stink like the car or my wife will shoot me and never want her or the kids in it LOL
** I do see I can use what my 350 had, a rubber grommet and a vent "pipe" to the OAI air cleaner. I just wasn't sure since the car didn't have a 455 when I got it.
My goals is not not stink like the car or my wife will shoot me and never want her or the kids in it LOL
#3
Ah.. no I’m running full electronic controlled ignition through the sniper.
reason I’m confused ...see attached from my assembly manual it doesn’t even show a PCV valve on either side just just shows pipes coming out of the valve covers and going into both sides of the air cleaner with no filter on it..
reason I’m confused ...see attached from my assembly manual it doesn’t even show a PCV valve on either side just just shows pipes coming out of the valve covers and going into both sides of the air cleaner with no filter on it..
#4
Ah.. no I’m running full electronic controlled ignition through the sniper.
reason I’m confused ...see attached from my assembly manual it doesn’t even show a PCV valve on either side just just shows pipes coming out of the valve covers and going into both sides of the air cleaner with no filter on it..
reason I’m confused ...see attached from my assembly manual it doesn’t even show a PCV valve on either side just just shows pipes coming out of the valve covers and going into both sides of the air cleaner with no filter on it..
AT cars used Plug P/N 405727 in the driver side hole in the air cleaner housing and the PCV valve goes in the driver side valve cover on those cars.
#5
#6
#7
Thank you Joe and Norm - as always a wealth of info and knowledge.
So I plug the driver side on the air cleaner base and run the breather/PCV to Manifold vacuum - Pass side as shown in the image...pretty easy, also to be clear no extra "filter" in the air cleaner, just the rubber connection and the air cleaner filter takes care of it from there ?
So I plug the driver side on the air cleaner base and run the breather/PCV to Manifold vacuum - Pass side as shown in the image...pretty easy, also to be clear no extra "filter" in the air cleaner, just the rubber connection and the air cleaner filter takes care of it from there ?
#8
Thank you Joe and Norm - as always a wealth of info and knowledge.
So I plug the driver side on the air cleaner base and run the breather/PCV to Manifold vacuum - Pass side as shown in the image...pretty easy, also to be clear no extra "filter" in the air cleaner, just the rubber connection and the air cleaner filter takes care of it from there ?
So I plug the driver side on the air cleaner base and run the breather/PCV to Manifold vacuum - Pass side as shown in the image...pretty easy, also to be clear no extra "filter" in the air cleaner, just the rubber connection and the air cleaner filter takes care of it from there ?
#9
Look again. The "dual ventilation system" with two breathers was for W-30s and MT cars that have the PCV nipple on the intake. Note the star and the note:
AT cars used Plug P/N 405727 in the driver side hole in the air cleaner housing and the PCV valve goes in the driver side valve cover on those cars.
AT cars used Plug P/N 405727 in the driver side hole in the air cleaner housing and the PCV valve goes in the driver side valve cover on those cars.
Thanks!
Pat
#10
Here's the 404521 iron intake with the nipple in place.
Here's the same 404521 casting with the boss undrilled.
#11
Pat, I'm not sure exactly what you're asking. The cast iron intake used on the 70-72 cars had a boss right behind the water crossover. On AT cars this was left blank. On MT cars, it was drilled and a nipple pressed in just like on the W-30 manifolds.
Here's the 404521 iron intake with the nipple in place.
Here's the same 404521 casting with the boss undrilled.
Here's the 404521 iron intake with the nipple in place.
Here's the same 404521 casting with the boss undrilled.
Pat
#12
Can't say that I have a good answer. The MT engines had a more radical cam than the AT engines. Maybe there was an issue with not enough vacuum for the PCV system to work reliably - except that the AT W30 used the same cam as the non-W 442s.
#13
Pat
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