PCV valve hose goes???

[Unkle Krusty]

The smallest bill we have in Canada, is $5.00. The $1 Loonie, is a coin. The $2 Tui, is also a coin. We do not use pennies anymore, was too difficult for the kids to count. My 318 is the same as the pic above. 36. Edelbrock supplied pics in the instructions

 

[koosh]

Koosh, On street engine run with a pcv. Hook to 3/8 un Ported vacuum, front or back but below the blades.
You need a breather in the other valve cover for inbound air flow. This will help with internal pressure and help prevent oil leaks.

So you are saying:
“On street engine run with a pcv. Hook to 3/8 un Ported vacuum, front or back but below the blades.”
Where this plug is on the front of the throttle body?

 

[RemCharger]

The smallest bill we have in Canada, is $5.00. The $1 Loonie, is a coin. The $2 Tui, is also a coin. We do not use pennies anymore, was too difficult for the kids to count. My 318 is the same as the pic above. 36. Edelbrock supplied pics in the instructions

Toonie.
But I don't think anyone had a counting problem, it's that pennies are too f#*king annoying

 

[RemCharger]

So you are saying:
“On street engine run with a pcv. Hook to 3/8 un Ported vacuum, front or back but below the blades.”
Where this plug is on the front of the throttle body?
View attachment 1841501

A couple of simple solutions; look up the instructions for that efi kit and / or; pull the TB and have a look-see

 

[oldbee]

So you are saying:
“On street engine run with a pcv. Hook to 3/8 un Ported vacuum, front or back but below the blades.”
Where this plug is on the front of the throttle body?
View attachment 1841501

That should work fine.

 

[68 Sport Satellite]

Koosh, On street engine run with a pcv. Hook to 3/8 un Ported vacuum, front or back but below the blades.
You need a breather in the other valve cover for inbound air flow. This will help with internal pressure and help prevent oil leaks.

EDIT for correction - no vent holes under cap - On mine I've got a valve cover PCV valve cap like this (with a vacuum hose connecting the PCV 90-degree nipple to manifold vacuum):

Compared to this, what's the added benefit of placing the breather on one valve cover and the PCV valve on the other? (my other valve cover cap is just a cap where oil is filled).

 

[koosh]

I FINALLY got ahold of someone at MSD, told them all ports on the back of my Atomic EFI throttle body were being used. He recommended using the larger plugged port on the front for the PCV valve. Thanks for everyones input!

 

[eldubb440]

On mine I've got a valve cover breather cap with holes on the underside of the cap and PCV valve insert like this (with a vacuum hose connecting the PCV 90-degree nipple to manifold vacuum):
View attachment 1841517

Compared to this, what's the added benefit of placing the breather on one valve cover and the PCV valve on the other? (my other valve cover cap is just a cap where oil is filled).

Sorry OP - hope this is not derailing since you have EFI, but hoping a setup like the photo above may be an option for you - and others, please correct me on my setup if this is not a good idea to have breather and PCV all in same cap.

that looks useless to me

 

[oldbee]

that looks useless to me

Me also, need some “cross flow” across the engine.

 

[MarPar]

A couple of simple solutions; look up the instructions for that efi kit and / or; pull the TB and have a look-see

 

[RJRENTON]

View attachment 1841530

???? ......Another cryptic expression???......perhaps, the best thing to do is READ the instructions that came with the item????
BOB RENTON

 

[koosh]

Perhaps read post #47…..

 

[MarPar]

???? ......Another cryptic expression???......perhaps, the best thing to do is READ the instructions that came with the item????
BOB RENTON

No Bob, not a cryptic expression. Take it at face value.

Rem said look at the instructions. I said "BINGO" meaning I agreed with him. Pretty cut and dried.

 

[RemCharger]

No Bob, not a cryptic expression. Take it at face value.

Rem said look at the instructions. I said "BINGO" meaning I agreed with him. Pretty cut and dried.

Very kind of you to explain.. but I fear there's no point..

 

[MarPar]

Very kind of you to explain.. but I fear there's no point..

 

[RemCharger]

View attachment 1841618

NICE ONE

 

[coloradodave]

On mine I've got a valve cover breather cap with holes on the underside of the cap and PCV valve insert like this (with a vacuum hose connecting the PCV 90-degree nipple to manifold vacuum):
View attachment 1841517

Compared to this, what's the added benefit of placing the breather on one valve cover and the PCV valve on the other? (my other valve cover cap is just a cap where oil is filled).

Sorry OP - hope this is not derailing since you have EFI, but hoping a setup like the photo above may be an option for you - and others, please correct me on my setup if this is not a good idea to have breather and PCV all in same cap.

Can you show a picture of the underside of that cap with the PCV valve? The caps of that type that I've seen weren't vented on the bottom. They were used on valve covers that only had a screw in hole meant for a sealed oil filler cap. It provided for an easy way to fit a PCV valve. If it is vented it makes no sense!

 

[68 Sport Satellite]

Can you show a picture of the underside of that cap with the PCV valve? The caps of that type that I've seen weren't vented on the bottom. They were used on valve covers that only had a screw in hole meant for a sealed oil filler cap. It provided for an easy way to fit a PCV valve. If it is vented it makes no sense!

EDIT - apologies - that was a screen shot of an example and not my actual cap. I've updated my earlier post as well for correction.
Even bigger apologies - I just ran down to the garage and looked and my cap is not vented underneath - my memory must be shot. It's flat. So on mine it's just a PCV cap, but no vent. I'm an idiot...

I still don't understand how a vented cap on one side and a PCV valve cap on the other side work together. Can you have one or the other and not both and still be ok? Which is more important?

Should I be replacing the sealed cap on the opposite side valve cover with a vented one?

 

[eldubb440]

I still don't understand how a vented cap on one side and a PCV valve cap on the other side work together. Can you have one or the other and not both and still be ok? Which is more important?

put a straw in your mouth and suck (pcv)....... if you plug the other end (breather), you can no longer suck

your engine is the straw, and the object is to suck air through it

also affects air/fuel ratio as the pcv system is a controlled (metered) "vacuum leak"; and the carb is jetted to compensate

excessive internal pressure will look to escape through gaskets and seals, creating leaks

 

[68 Sport Satellite]

put a straw in your mouth and suck (pcv)....... if you plug the other end (breather), you can no longer suck

your engine is the straw, and the object is to suck air through it

also affects air/fuel ratio as the pcv system is a controlled (metered) "vacuum leak"; and the carb is jetted to compensate

excessive internal pressure will look to escape through gaskets and seals, creating leaks

Agree on all of this except the first part which is a bit confusing...

put a straw in your mouth and suck (pcv).......
ok, yes, the PCV has a one-way check valve yes?

if you plug the other end (breather), you can no longer suck
Not sure what you mean here. If you have a breather, the breather end is open, not closed, correct?

One thing to note here, in keeping with the OP's issue - my car has a carb and he's running EFI. Both can benefit from a PCV valve, but I imagine that each have different requirements for a breather cap vs no breather cap on the opposite side since carb is an open system and EFI is a closed system. Am I correct on that?