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Tuesday PCV valve question
- Thread starter bdkw1
- Start date
Will Scarlet
The universe is vast...
- Joined
- May 20, 2020
- Member Number
- 766
- Messages
- 1,663
49willys_mogon
Member
- Joined
- Jun 7, 2021
- Member Number
- 4029
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- 16
Looks similar to an early vette
www.autozone.com
ACDelco PCV Valve 19310783
Shop for ACDelco PCV Valve 19310783 with confidence at AutoZone.com. Parts are just part of what we do. Get yours online today and pick up in store.
www.autozone.com
7/16" outlet.Looks similar to an early vette
ACDelco PCV Valve 19310783
Shop for ACDelco PCV Valve 19310783 with confidence at AutoZone.com. Parts are just part of what we do. Get yours online today and pick up in store.
CarterKraft
Red Skull Member
I tried to find one of those one time and it sucked, I didn't think it should have.
CarterKraft
Red Skull Member
![[486]](https://data.irate4x4.com/avatars/m/0/94.jpg?1700178133){kind=avatar}
[486]
ugh, that guy again?
there are a couple datsun ones for a12 motors that are 1/4" bspt on one end, which you could stuff a 9/16 hose onto with a clamp
don't remember the hose size though
don't remember the hose size though
Yeah, I have those bookmarked. Just not sure if they are fast enough acting for a pcv valve. I may buy some just to see. The 14mm ones have a more correct looking picture.
CarterKraft
Red Skull Member
If they are serviceable you could pull the spring out, lighten the ball etc.
Really looking for a Reed valve type.
subybaja
E. Spengler
Adding a PCV was a common mod on the KLR650. You might look those up.
[486]
ugh, that guy again?
ain't there more to a pcv valve than just a check valve?
CarterKraft
Red Skull Member
arse_sidewards
Red Skull Member
- Joined
- May 19, 2020
- Member Number
- 71
- Messages
- 8,556
Gen 1 Subaru Legacy (and many other applications) is NPT and whatever size the barb is fits 3/4 expansion PEX nicely.
I know this doesn't help OP but knowing the shit you get up to it might help you.
That's where this started. On the KLR, the trick was to use a step down one and run the little hose to the vacuum spigot on the intake manifold. Pulling a slight vacuum on the crankcase made a noticeable difference on power and oil consumption.
Doing a KTM690 now, going to the intake is out, just going to the airbox like stock. It has a stupid solenoid check valve in line that I am trying to delete. Smog BS that has no place on an ADV bike. The fuel vapor canister has all ready left the chat.
CarterKraft
Red Skull Member
Any non EPA configuration of the bike in the parts manual?
No.
Fortunately this is a 2012 and the computers are pretty programmable. The way I'm deleting stuff shouldn't throw any codes though. It will just need a better map for the new exhuast. The bottom end on these is pretty lean at part throttle, like 14.5-1. Bumping it to high 12's makes them much better to lug around.
subybaja
E. Spengler
Big thread with pics and part #s. Apparently in the last decade everyone decided it's a waste of time.
Good fitting PCV, with pics. - KLR650.NET Forums - The Original Kawasaki KLR650 Forum!
In preparation for the new rings I fitted a PCV while in town today. Took the pipe off the bike and walked around Auto Zone with it until I found one that was a good fit. Auto Zone part# PCV1175 (PC272) Just cut the pipe and join it back together with the PCV. It doesn't make any noise.
www.klr650.net
Yeah, I was on there about the time that thread started. To many bolt on farkle bandits and not enough skilled people. Fork swaps and rear suspension redesigns did not go over well. Or maybe it was just my approach.
If I win the lotto, I'd just buy one of these.
www.improvedracing.com
High-Flow, Low Cracking Pressure Flapper Check Valve, -8AN Male
High flow, low cracking pressure flapper style check valve with -8AN male connections. 0.05 PSI cracking pressure. 300+ psi max operating backflow holding pressure, 1,000+ psi max operating pressure in normal direction of flow. FKM seals are compatible with most automotive fluids and gases. -4°F...
www.improvedracing.com
subybaja
E. Spengler
Same. I'm probably in that thread, did that mod. And YZ forks. I got sick of Whatshisname's over-moderation, and left for ADV. Then I got sick of dentists and hit PBB. At this rate I'm headed for 4chan.Yeah, I was on there about the time that thread started. To many bolt on farkle bandits and not enough skilled people. Fork swaps and rear suspension redesigns did not go over well. Or maybe it was just my approach.
[486]
ugh, that guy again?
don't bother, they've been redditified quite a bit
[486]
ugh, that guy again?
...
a pcv valve doesn't go to the airbox
Not normally no. If functioning correctly, it will still create a slight crankcase vacuum on a single cylinder engine. Multi cylinder it won't do shit without manifold vacuum.
Ok, couple extra tidbits.
1, the Reed valve in the head does not work like I think it does.
2, crankcase pressure builds up pretty quick in an LC4.
3, The clutch cover is held in by the rubber gasket. When it builds enough case pressure, it will eject the cover like a fucking air cannon into your right shin scaring the bejesus out of you.
Fortunately not much oil comes out when this happens. This is going to require a little more investigation.
1, the Reed valve in the head does not work like I think it does.
2, crankcase pressure builds up pretty quick in an LC4.
3, The clutch cover is held in by the rubber gasket. When it builds enough case pressure, it will eject the cover like a fucking air cannon into your right shin scaring the bejesus out of you.
Fortunately not much oil comes out when this happens. This is going to require a little more investigation.
Vent it to atmosphere and run a filter on the end of the hose? It's not going to supply vacuum to the crankcase but it will keep the engine from sucking in dirty air which has got to help.
Ok, took the reed valve cap off. It's a one way for an exhuast port venturi deal. It creates a pretty good vacuum.
So I had the crankcase vent feeding into the head vent and the exhuast ejector setup sucking air form the airbox
New plan, T the 2 vents together and run them to the ejector port. Dragster style......
So I had the crankcase vent feeding into the head vent and the exhuast ejector setup sucking air form the airbox
New plan, T the 2 vents together and run them to the ejector port. Dragster style......