Lets get that PCV system working properly before you spend any money on anything or take it to anyone. You'll be surprised what not having a properly working PCV system can do.
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454 oil consumption (Cherry truck LOOK)
- Thread starter trevmountain
- Start date
trevmountain
1/2 ton status
Yo Eric, ya let me know of a good shop. I've kinda already tried the Jackson mechanics and well if they were good I wouldn't have needed to post the thread. Hey the truck's nice (thanks for that) but nothing to what it's going to be. By the way loving the new Pit's on your blazer. Looks like you've done some work to her. 
I would love to get the PCV system working properly Scott. Can you give me a list of parts to get. It'll have to be something incorporating the oil cap since I have aftermarket valve covers. I may have to drill a hole on the underside of the air cleaner and set in some kind of grommet to hold the hose. But ya if you've got some ideas for specific parts.??
Thanks
I would love to get the PCV system working properly Scott. Can you give me a list of parts to get. It'll have to be something incorporating the oil cap since I have aftermarket valve covers. I may have to drill a hole on the underside of the air cleaner and set in some kind of grommet to hold the hose. But ya if you've got some ideas for specific parts.??
Thanks
Kind of a long shot but maybe the plugs are the wrong heat range?
All you need to make sure of is that there is a PCV valve in one valve cover attach to manifold vacuum and the other cover has a "clean air" hose that goes to the bottom of the air cleaner assmebly. You CANNOT have any type of open air breather on either valve cover. If this means you have to use a grommet in each cover for the PCV valve and the fresh air hose and you need to pull a grommet to add oil then that's what will have to happen. Most valve covers had one hole in once cover and two holes in the other though so that you have a dedicated oil fill location.
fortcollinsram
1/2 ton status
Not to steal the thread at all but I am trying to get me head around this a little bit. I currently have one valve cover grommet plumbed to the base of the TB to manifold vacuum. The other side, I simply have a K&N breather. So does the slight vacuum of having the second valve cover plumbed to the base of the air cleaner really make that much of a difference?? What about just plugging the hole in the VC that has the breather in it, or is it truly better just to plumb it to the air cleaner base?
trevmountain
1/2 ton status
To Fortcollinsram, I have the exact same set up as you do. I wondered the same thing about the K&N breather oil cap. Apparently this type of set up is called an open PCV system, and having a hose run from the valve cover to the underside of the air cleaner makes it a closed system. The only way I could do this or you for that matter would be to find a regular oil cap that has a small hole in it so you could plumb a hose to the underside of the air cleaner. Or to get a normal fully sealed oil cap and drill a another hole in the valve cover and plumb the hose to the air cleaner. I am familiar with this set up. Most normal stock vehicles are set up this way but I would have thought the K&N breather would function much the same way. I think that by using a hose to air cleaner it will create a small amount of vaccum..?? Not quite sure but it shouldn't be to hard to set it up.
One way to do it would be to get a normal plug style oil cap and drill out a hole and then putting a nipple fitting up from inside of the cap, seal it up with silicone and then attatch the hose with a clamp and voila. I know they make fittings with nipples for air cleaners so that wouldn't be hard, just drill a hole.
I got it right 4x4 high?
Eric, I just went with stock specs on the NGK's listed in the pics. Maybe a hotter plug??
One way to do it would be to get a normal plug style oil cap and drill out a hole and then putting a nipple fitting up from inside of the cap, seal it up with silicone and then attatch the hose with a clamp and voila. I know they make fittings with nipples for air cleaners so that wouldn't be hard, just drill a hole.
I got it right 4x4 high?
Eric, I just went with stock specs on the NGK's listed in the pics. Maybe a hotter plug??
Trev, you've got the concept now but all you need to do is buy the correct valve cover grommet that fits the valve cover and that has a proper size hole (usually 3/4") for the metal/plastic pipe that goes to the air cleaner assembly. There is a metal or plastic pipe that pushes into the grommet and then the other end has a rubber hose that fits the metal/plastic pipe and then attaches to a fitting on the air cleaner assembly.
trevmountain
1/2 ton status
I totally know what your sayin. I just got get the parts and get it hooked up. I noticed the air cleaners got some punch out holes ready to accept the hose plumbing so that's good. I'll have to utilize the oil fill hole some how cuz I really don't wanna drill any holes. While I was out fartin around with it I thought I'd grab some better shots of the motor just for ****s.
WannabeRacing
Registered Member
I just finished this Big Block engine and I can't seem to figure out how to rig up and route the PCV valve system. I want to do this engine right. Can someone please help me with that.
Yep, looks like a race engine to me. I can tell you the proper way but you'll just disagree with me anyways. 
Seems you want to do nothing but argue/disagree with me about engine related topics so i'm going to avoid posting in any post that you've had your .02 in. Maybe you should do the same with me.
In all the time i've been on CK5 i've never used the ignore feature but you're just about there.
Seems you want to do nothing but argue/disagree with me about engine related topics so i'm going to avoid posting in any post that you've had your .02 in. Maybe you should do the same with me.
In all the time i've been on CK5 i've never used the ignore feature but you're just about there.
I just finished this Big Block engine and I can't seem to figure out how to rig up and route the PCV valve system. I want to do this engine right. Can someone please help me with that.
Well, I'm not a mechanic by any stretch but you have the ability to build an engine like that and can't figure out the PVC junk?????
rufusbooth
1/2 ton status
4x4High is the expert here but the new pix may have shed some light on the situation. I noticed that your current hose running from the PVC valve to your manifold vacuum source is labeled as transmission cooler line.
4X4High, that hose might collapse under high vacuum, what do you think? I have always acquired vac line rated for something like a vac brake booster when setting up my pcv system.
That might be your first step to diagnosing the system along with getting your other valve cover plumbed into the bottom of your air cleaner.
Cheers,
Rufus
4X4High, that hose might collapse under high vacuum, what do you think? I have always acquired vac line rated for something like a vac brake booster when setting up my pcv system.
That might be your first step to diagnosing the system along with getting your other valve cover plumbed into the bottom of your air cleaner.
Cheers,
Rufus
fmstruck
1/2 ton status
Someone please explain to me how it can make any difference whether you take filtered air from the air cleaner base or a filtered breather. Seems like the same thing to me. I have been doing this all my life and have never had a problem running a PCV valve in one cover and a Breather in the other.
WannabeRacing
Registered Member
Well, I'm not a mechanic by any stretch but you have the ability to build an engine like that and can't figure out the PVC junk?????
Without a doubt, a good running PCV system is a great thing. It is a great way to pull vacuum in the crankcase, as well as give somewhere for positive crankcase pressure to go.
There are other ways to achieve the same thing. I run small electric vacuum pumps (smog pumps run backwards) on my street trucks and cars that way the oil can go to a catch can rather than back into the intake side of the engine. All of the pro stock cars, NASCAR stuff and bigtime racing engines use vacuum pumps to create a large amount of crankcase vacuum. It is a way to create less windage on cranks, rods, etc and makes large amounts of power increase. It is hard on parts and creates lots of other issues like buring up wrist pins, welding ring lands, and is just generally hard on parts. Not a way to go for a truck/car daily driver, etc. Jessica, the above posted engine, is just a little engine for one of my boats. Not a race engine by any stretch, but does have lots of race inspired technology, and pulls 12 inches of vacuum while running.
But what is more important here is that I have greatly offended someone. I went back and read this post and did not see where I was at odds with him. However, it does not matter what I thought happened, it matters what he thought. In our world, preception is reality. And if he is thinking that way, there are probably others thinking the same thing. It was not my intent to offend, and I am sorry that I did. I just wanted to come on this site to gain some ideas on how to go about re-building my K5 and doing it right the first time. To do it right after seeing hundreds of others with experience letting me know the right route to take. Unfortunately I have offended and started contention. I do appologize to those with whom I have offended, and certainly to 4X4HIGH. Rather than let the contention continue, I will just bow out of this internet site rather than have a fued or online argument take place.
It has been fun, and I thank all of you for the knowledge. Maybe I will catch you on a trail sometime. Just look for the candy red 75' with WannabeRacing on the window. Good luck everyone, and I hope you find your problem with your oil burning issue. Great looking truck you have.
-Wannabe-
Bye.
Later dude!
Trev, Scott (4x4High) is the guru around here for engines so do what he says and if it still having problems let us know. If it still is take it to Wallys on 17 st in Idaho Falls, I know a couple techs there.
Trev, Scott (4x4High) is the guru around here for engines so do what he says and if it still having problems let us know. If it still is take it to Wallys on 17 st in Idaho Falls, I know a couple techs there.
Thanks for thinking so highly of me guys. I've been working on cars since i was 11 years old so that gives me 31 years of experience under my belt. I don't know everything (noone does) but in those 31 years i have accumulated more knowledge than the average person probably has. I am a self taught automotive machinist and even though i've never held a position as an automotive technician i would still consider myself one. The best knowledge a person can get is self taught with "hands on" experience. You can read all the books you want and be "book smart" but reading a book and having hands on is a whole lot different.
Anyways, i just want to thank the people who have trust in my abilities to help diagnose problems from behind my computer screen.
Anyways, i just want to thank the people who have trust in my abilities to help diagnose problems from behind my computer screen.
+1
4x4HIGH, I'm not doubting your experience at all. I just can't see the difference between air from the air cleaner and air going through the breather filter....help a brudda out!!
+1
4x4HIGH, I'm not doubting your experience at all. I just can't see the difference between air from the air cleaner and air going through the breather filter....help a brudda out!!
Having the fresh air hose attached to the air cleaner like it's supposed to be will draw a vacuum across the hose and actually help pull blowby from the crankcase along with the PCV valve. When you run an open air breather that creates a vacuum leak in the crankcase (think about the PCV valve that is attached to manifold vacuum) so now the PCV valve cannot do its job. I don't know if you or anyone else who doubts me will understand but I know how the system works and the effects of not having the system set up properly.
Thanks man.
I have an A&P license, and have been wrenching since I was 15. Just never realized or thought about a pcv system having 2 vacuum sources. I always thought air came from the air cleaner, through the motor, then through the valve to the carb.
Learned something new....
