crankcase vent, question.
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Joined: Jun 2005
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From: Louisiana
crankcase vent, question.
I was reading about crankcase venting and I couldnt get a straight anwser. Do I just hook up the oil filler nipple directly to the intake nipple? If so I can do that. I just don't want to screw up my car without checking with the people who know.
Thanks in advance
-nicholas-
Thanks in advance
-nicholas-
Full Member
Joined: Sep 2006
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From: Hickville, Oregon
I think you need that little round plastic thingy! lol
My POS computer crashed trying to load it, so Im sorry I cant be more specific, but check the FAQ on rats nest removal for either 12a or 13b, Im not sure what motor you have. Crankcase venting procedure is in the last 5 or 6 steps of the tutorial.
Hope this helps, Good Luck!
My POS computer crashed trying to load it, so Im sorry I cant be more specific, but check the FAQ on rats nest removal for either 12a or 13b, Im not sure what motor you have. Crankcase venting procedure is in the last 5 or 6 steps of the tutorial.
Hope this helps, Good Luck!
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From: Grand Rapids Michigan
All I did was run a line from the nipple on the oil filler tube to the base of the carb. Solved my lung mustard issue and I've had no problems with this setup at all. I like simple! 
Just go get a PCV valve from a autoparts store, simple and easy!
Here is what you need to do:
Yeah that purge valve is important. I think if you dont have you could build up the dreaded lung mustard! But not to fear as you have helped us out with your how to's we shall help you out. I broke that stupid plastic thing too.
Here is what you need to do:
Lucky for you guys, I got my PCV system hooked up and running perfectly, so I'm more than willing to share. Hell, if I had the afternoon off work, I'd even throw in pics!
Okay, follow carefully, this is a three-line procedure, and you need about 3ft of 5/16" fuel/emissions/vacuum hose to do it:
Line #1
- Oil Filler Neck goes to non-threaded side of PCV Valve
- Threaded Side of PCV Valve goes to the vacuum source on the intake manifold under where the shutter valve used to be.
I didn't even realize this vacuum source was there until I read some posts on how to do this. It's on the manifold just above the #2 rotor housing
Line #2
There's a connection on the intermediate housing I believe, which juts out towards rotor housing 2. This is just above/ahead of the one on the oil filler neck and would normally have your charcoal canister plugged into it (via a metal tube that follows along the firewall).
- That connection needs a line going to a fresh air source. With the rat's nest removed, that's really easy. There's one on the stock airbox, just above and to the left of the carb vent.
Line #3
Now your charcoal canister isn't hooked to anything.
- Remove the old line that went from the metal tube on the firewall to the intermediate housing. Replace this line with a new one that goes to the carb vent.
And you're done! easy as 1, 2, 3.
Jon
For the PCV just get one that fits in the to hose at both ends. Thats what I did and it works great!!!
OR
Quote:
Originally Posted by vipernicus42
There should be a section with PCV valves at your local part store. I know here in Canada, you can go to Canadian Tire and they have a section devoted to it.
If you need to give them a vehicle make/model so that they can look it up in the computer tell them you have a '90 Dodge Caravan with the 3L V6. This is the purge valve you're looking for (or anything similar).
Basically you need one that sits in-line, with the vacuum source on one side and the "crankcase" on the other. The threaded end will go towards the manifold vacuum source, the other end will connect to the oil filler neck.
It should be a metal hexagonal-cylinder about three inches long. ANY part store should be able to hook you up for five bucks or less.
Jon
Originally Posted by MattG
Here is what you need to do:
Yeah that purge valve is important. I think if you dont have you could build up the dreaded lung mustard! But not to fear as you have helped us out with your how to's we shall help you out. I broke that stupid plastic thing too.
Here is what you need to do:
Lucky for you guys, I got my PCV system hooked up and running perfectly, so I'm more than willing to share. Hell, if I had the afternoon off work, I'd even throw in pics!
Okay, follow carefully, this is a three-line procedure, and you need about 3ft of 5/16" fuel/emissions/vacuum hose to do it:
Line #1
- Oil Filler Neck goes to non-threaded side of PCV Valve
- Threaded Side of PCV Valve goes to the vacuum source on the intake manifold under where the shutter valve used to be.
I didn't even realize this vacuum source was there until I read some posts on how to do this. It's on the manifold just above the #2 rotor housing
Line #2
There's a connection on the intermediate housing I believe, which juts out towards rotor housing 2. This is just above/ahead of the one on the oil filler neck and would normally have your charcoal canister plugged into it (via a metal tube that follows along the firewall).
- That connection needs a line going to a fresh air source. With the rat's nest removed, that's really easy. There's one on the stock airbox, just above and to the left of the carb vent.
Line #3
Now your charcoal canister isn't hooked to anything.
- Remove the old line that went from the metal tube on the firewall to the intermediate housing. Replace this line with a new one that goes to the carb vent.
And you're done! easy as 1, 2, 3.
Jon
For the PCV just get one that fits in the to hose at both ends. Thats what I did and it works great!!!
OR
Quote:
Originally Posted by vipernicus42
There should be a section with PCV valves at your local part store. I know here in Canada, you can go to Canadian Tire and they have a section devoted to it.
If you need to give them a vehicle make/model so that they can look it up in the computer tell them you have a '90 Dodge Caravan with the 3L V6. This is the purge valve you're looking for (or anything similar).
Basically you need one that sits in-line, with the vacuum source on one side and the "crankcase" on the other. The threaded end will go towards the manifold vacuum source, the other end will connect to the oil filler neck.
It should be a metal hexagonal-cylinder about three inches long. ANY part store should be able to hook you up for five bucks or less.
Jon
Originally Posted by rbf41182gt
This is how mine is hooked up, it's an SA, but it should be similar
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Thread Starter
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From: Louisiana
Do I need to have a oil catcher or anything like that? On the air compressor we have to have a water catcher I was just wondering the same with the rx7.
Last edited by Nicholas P.; Feb 6, 2007 at 06:34 PM.
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Joined: Jun 2004
Posts: 1,081
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From: Richmond, VA
Originally Posted by Frostycrowd
I like that diagram, but you arent running the fuel tank vent to your char filter? when I took mine out I just took the hoses off. And also is there any point to that carb vent line. Mine wasnt connected when I got the car a few months ago.
On an SA, the charcoal filter is inside the aircleaner (the hose on top)
that diagram is out of date though, for I have the racing beat air cleaner now, so the fuel tank vent and carb vent are just venting into the engine bay. :-P
You need a pcv valve inline between the crankcase and carb. All a pcv valve is, is a oneway valve in case the carb backfires, it won't blow back into the crankcase. Simple.
Senior Member
Joined: Oct 2002
Posts: 501
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From: Eugene, Oregon
T:
1 more step I found thats helpful is to install a Water-Air Seperator.
You can find these @ any Hydo Shop for about $15 or if you have a Harbor Freight Tool store in your area they are only $4-5.
They are about 3"s Height and 1-1/2 Width.
(Small Water-Air Seperator).
Hook it up between the Intake Source and the PCV Valve.
Remember that the Moisture that you remove is going somewhere.
For some it's no biggie, for me I don't want that moisture any where near my Intake system.
I did this install cause the RB Intake Mani only has the Brake Booster
Vacumn Fitting so I figure that some of the uncolected Moisture could be going there also.
Shouldn't though if your using a PCV Valve.
I can take Pictures later today if anyones interested.
Bone Dry and no Lung Mustard.
After about 7500 miles Seperator only 1/2 way full of water.
Make sure whatever one you buy that it has a Drain @ the Bottom of it.
sgieldon
steve
1 more step I found thats helpful is to install a Water-Air Seperator.
You can find these @ any Hydo Shop for about $15 or if you have a Harbor Freight Tool store in your area they are only $4-5.
They are about 3"s Height and 1-1/2 Width.
(Small Water-Air Seperator).
Hook it up between the Intake Source and the PCV Valve.
Remember that the Moisture that you remove is going somewhere.
For some it's no biggie, for me I don't want that moisture any where near my Intake system.
I did this install cause the RB Intake Mani only has the Brake Booster
Vacumn Fitting so I figure that some of the uncolected Moisture could be going there also.
Shouldn't though if your using a PCV Valve.
I can take Pictures later today if anyones interested.
Bone Dry and no Lung Mustard.
After about 7500 miles Seperator only 1/2 way full of water.
Make sure whatever one you buy that it has a Drain @ the Bottom of it.
sgieldon
steve
Full Member
Joined: Oct 2006
Posts: 101
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From: shreveport, la
I have done a lot of search on this and most are for cars that have had the rats nest removed. My rats nest is in place. So I dont know where to get a vacuum. Also there is a nipple that comes off of the oil filler neck that has a line that runs somewhere on it. Do I need to put a "T" there? I have a base 81. I am getting lung mustard at this time and hate it. I love diagrams on how to do these things.
rbf41182gt you did a good job.
rbf41182gt you did a good job.
I wish I had taken pics when I did this to my car. Use a PCV Valve from a 90 dodge caravan 3.0, and a T valve, plus i believe 6 feet of vaccuum hose, dont know the size off hand.
Thread Starter
Joined: Jun 2005
Posts: 1,415
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From: Louisiana
I am going to go to advanced auto. I am going to get the the long hose for the vacuum. And I am going to get the pcv valve so just incase of a backfire. Along with a water catcher for water type buildup for safety.
-nick-
woot finnaly after months of wondering it was all just that simple.....
boy im a dud lol.
-nick-
woot finnaly after months of wondering it was all just that simple.....
boy im a dud lol.
Thread Starter
Joined: Jun 2005
Posts: 1,415
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From: Louisiana
I would really like to do the water seperator just as a curiosity thing. Thanks for helping me on all of this. Its the only car I have and I try to make it as reliable as I can. If it breaks there isnt another.
-nick-
thanks again.
-nick-
thanks again.
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From: Grand Rapids Michigan
Originally Posted by trochoid
To properly vent the crankcase, it needs fresh coming in. If it's set up that way, then the out tube should go to the air cleaner, not a vacuum port.
Originally Posted by Kentetsu
Trochoid- No argument here, but I was wondering if you had any ideas why my setup (vacuum line from filler tube to base of carb) seems to be working for me? Not a trace of lung mustard since I did this. Since this is working for me, I myself will not be adding a pcv valve unless I can be convinced that I really need one. Thanks...