Valve cover question - ka24de

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7anshin8r
Posts: 543
Joined: Sat Mar 10, 2007 10:06 am
Car: 96 Nissan 240sx

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I can't log on to my normal account and for some reason it is not sending me my forgotten password email so I created this account for now.

On the valve cover near the front there is a small 90 copper or brass elbow, hooked to a pipe that hooks up to the intake. Here is a picture:



This picture shows the area circled in green. This is where the 90 was...

Well I have an AEM WAI and this hose was disconnected by the mechanic telling me it was wrong, and they installed a plug on the intake and let the hose just hang... I didn't like the hose hanging as it was at times hitting my fan blades. I hooked up a small breather filter to the 90 elbow which worked fine, until I open the hood one day and the filter and the 90 are gone...

Now this hole is there and everyone parting out cars that I have talked to sold that as part of the valve cover when they sold it... I can't find another 90 unless I buy a whole new valve cover, which is silly.

Can I block this as it sucks air in? I put a penny over the hole and the suction held it in while the car was running, I had to pry it off when I shut the car off though and a huge sucking sound was the result.

I will continue to drive it uncovered until someone says that blocking it with the penny and some JB weld will not harm anything. I'm worried about it building up too much suction pressure???

So yes or no to this?

Thanks,7anshin


TheOne
Posts: 1836
Joined: Mon Aug 09, 2004 4:28 pm
Car: 93 240sx FB
Location: Arlington, TX

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i wouldn't block it off, that helps the engine breath, i'd try to find another elbow and hook it up to the intake like normal.(btw i'd also advice not going to that mechanic anymore, sounds like he doesn't do good jobs)

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7anshin8r
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Car: 96 Nissan 240sx

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LOL that was the first time and the only time I went there... I know I may not be the smartest man, but I can read the instructions and I know I hooked everything up right, but blah on them.

As far as blocking it that is why I didn't until I asked. I seems to be sucking real hard and I didn't think I should just block it. Florida is bad about mud dobbers and wasps finding their way into small holes and building nests... I guess it is back to the search for someone parting that is willing to give up that elbow then.

Thanks for the input.

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7anshin8r
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Car: 96 Nissan 240sx

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hahaha right after I posted this I pulled a hard left from my driveway and heard a clunk followed by the sound of something coming out from under my car... I can see it in the rear view bouncing in the lane next to the drivers side of the car. Maybe I left a tool under the hood...

So I walk down the road picking up parts... I find it, looks like a exhaust manifold stud sheared off at the motor. (Nut was still on it, I can tell it is a stud, half of the center section is there, it looks burnt, and it kicked out of the drivers side. Larger than a intake manifold stud, I checked.)

This day gets more fun by the minute! If one more part of my car falls off/shears off this month I am selling it... I know the cheep rout would be to go ahead and put headers on and have the exhaust mani pulled and the stud tapped back out... but I don't want a ka24de with loud *** headers that gain me very little power...

New motor time? I could tick everyone off and have a ls1 dropped in for fairly cheep.

tonynalli
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Ahh someone from Gainesville. I just came up a few weeks ago for surgury and am recovering from it now. Do you go to the thurday night INTMO meet at butler plaza?

Anyways, you definatly want to connect that hose back up. Even though it is not really needed to be connected to the intake, you can do that. My suggestion is getting a long hose and routing it towards the bottom of the car. The gasses from the engine will eventually go into your car when you are driving, and its not a real pleasent smell.

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Raxephon
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Car: '04 RX8...for the moment...

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So you decided not to use the pipe I gave you?

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7anshin8r
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Car: 96 Nissan 240sx

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anlasak wrote:So you decided not to use the pipe I gave you?
I would but it is too large. Can't make it fit. I tried a good bit yesterday but it def. would not fit.

Thanks though!

Shabbernigdo
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Joined: Thu Jul 20, 2006 11:36 am

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I belive that is part of your breather seystem. not 100% on that tho.

If it is it helps to keep exaust gases from contaminating your oil and making it acidic.

leveloneae86
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Joined: Tue Oct 03, 2006 11:43 am

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ehhhm isnt that where ur pcv valve goes nd its for discharging waste thats produced from the combustion and notaowing it to go back inside?

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7anshin8r
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leveloneae86 wrote:ehhhm isnt that where ur pcv valve goes nd its for discharging waste thats produced from the combustion and notaowing it to go back inside?
No, the PVC valve is lower, not on the valve cover. Besides this is sucking air in and not out.

I like Shabbernigdo's explanation best. Sounds more functional.

tonynalli
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It only sucks air in under idle. Try reving your motor up and see what it does. It connects to your intake to burn off those byproducts under normal driving conditions. Like I said, your best bet is to either reconnect it or run a line down towards the groud so you dont have to smell it all the time.

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donmada
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Car: 91 240sx with a s13 black top sr20det

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find out how much to ship the whole valve cover to you from 32905 and i will give it to you for 20 bucks

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7anshin8r
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Car: 96 Nissan 240sx

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donmada wrote:find out how much to ship the whole valve cover to you from 32905 and i will give it to you for 20 bucks
I didn't want to have to but a new valve cover because mine is fine except missing one part, not unless I have to. is it a 95-96 valve cover? (was there a difference in 97-98?)

If it is in good shape I may just go ahead and buy it from you, I have no idea what it weighs though, so I can't calculate shipping.

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7anshin8r
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tonynalli wrote:Ahh someone from Gainesville. I just came up a few weeks ago for surgury and am recovering from it now. Do you go to the thurday night INTMO meet at butler plaza?
I have yet to make it over there. I want to though, I think it would be fun. Speaking of... I was supposed to meet up with some people last night... My work schedule changed last minute and it made me think today was yesterday and I go out and wash my car today... Then, about half way though, well you know.

(apparently I turned into Pac Man and got into a fight with a sith lord, because he threw his poo at me or whatever that black stuff is...)

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Slipstream
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Car: '94 Sonoma, '90 300zx n/a

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Pull the valve cover off, tap the whole, put a threaded piece of pipe or a AN fitting and reconnect the hose or attach a breather filter. You can probably have it done pretty cheap. Match it with a black anodized fitting to match the valve cover.

Chris859
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Joined: Mon Aug 07, 2006 10:09 pm
Location: Pinetop, Az

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That is the air inlet that works with the pcv system, it needs to have filtered air. If you just leave it open you are just sucking dirty air, and contaminating your crankcase. Not to mention, it will also be an un-metered air leak if left open(bypassing the maf, causing a lean condition, possibly stumbling, poor idle, etc). To put it simply - if you don't know how the pcv(positive crankcase ventilation) system works, here it is. the Pcv valve uses vacuum from the intake, to put a vacuum on the crankcase, which pulls in filtered air through that breather tube... The basic principal is to circulate fresh air through the crankcase, while burning the vapors being drawn in through the pcv valve rather than venting them.

McManusKA24DE
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KA24DE Engine

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So, what size is the hose? I would like to buy an air breather for the valve cover but, I'm not sure on size.


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