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View Full Version : 4 Inch Drain Pipe Drainage Covers as Hood Vents?



chadjans
12-09-2004, 06:44 AM
Was wondering HD today. Found some four inch pvc drain pipe covers. Was thinking of using them as hood vents. Drill a 4 1/4 inch hole, insert, done. Am I crazy? Don't answer that. But where is the most heat build up under the hood. Over the engine or near the area where the 5.9 vents are?

Mods: Move if you think this is gay

Chad

95 ZJ
12-09-2004, 09:54 AM
It's pretty easy to do, myself and Nate off this board did to mine with Lowe's heater vents. Total cost about $6 or something. I got the idea from Alaska ZJ when he still lived up here. They look good and they are functional too, you can see the heat pour out of them when the motors really warm. Just make sure you figure out exactly where you want them before you start sawzalling the hood. There are pics of mine somewhere on this board but I don't remember where. I'm at work right now but when I get home I'll try and remember to post pics or if Alaska sees this maybe he'll remember where on this board he posted the pics of mine and link you to them. So to answer your question... No you not crazy, it's a great idea :wink:

95 ZJ
12-09-2004, 10:01 AM
I found the thread on them that Alaska posted, it's on the third page of general grand talk. Title of thread is "meat let's go of some heat" Don't ask.

nate
12-09-2004, 10:27 AM
Yeah that was fun installing those. I just realized how much I miss my garage. :(

JeepinHank
12-09-2004, 11:35 AM
Would PVC be able to handle the heat?

RufftyTuffty
12-09-2004, 02:47 PM
Would PVC be able to handle the heat?

Good point....i think PVC melts at around 240-280 F.

So, who's got a thermal gun?/How hot does the hood get?

~Mike

ATL ZJ
12-09-2004, 03:08 PM
I made my FIPK-style intake out of PVC. 3 years and no problems yet. It's painted too if that matters.

chadjans
12-09-2004, 10:03 PM
Would PVC be able to handle the heat?

Good point....i think PVC melts at around 240-280 F.

So, who's got a thermal gun?/How hot does the hood get?

~Mike

Not that hot. Besides at 1.98 a piece, they can be easly replaceable if you go without the morning latte.

Chad

chadjans
12-09-2004, 10:04 PM
It's pretty easy to do, myself and Nate off this board did to mine with Lowe's heater vents. Total cost about $6 or something. I got the idea from Alaska ZJ when he still lived up here. They look good and they are functional too, you can see the heat pour out of them when the motors really warm. Just make sure you figure out exactly where you want them before you start sawzalling the hood. There are pics of mine somewhere on this board but I don't remember where. I'm at work right now but when I get home I'll try and remember to post pics or if Alaska sees this maybe he'll remember where on this board he posted the pics of mine and link you to them. So to answer your question... No you not crazy, it's a great idea :wink:

Saw your install. But I was looking for something a little smaller and no offense but better looking. Not that PVC is a finished piece lol. Going to attack this project in two weeks....

Chad

95 ZJ
12-09-2004, 11:51 PM
Better looking? What are you talking about it doesn't get much better than that :mrgreen: I'm happy with it but I'm not building something to take to a ZJ customs show in Cali either lol. It's gonna be an ugly mother when I'm done with it anyway :twisted:

AprilzWarrior
12-10-2004, 01:01 AM
http://fototime.com/79DB8493427FAB3/standard.jpg
http://fototime.com/66C1F2C852C43A6/standard.jpg
http://fototime.com/AD38FC1C306B900/standard.jpg



CarParts.com 96 pontiac Grand Prix (supercharged edition)
$80 each
OSH for Nylon Spacers Under $5
and get a local painter.


Thats what I did.

AW

LouisianaZJ
12-10-2004, 01:10 AM
http://www.ericsxj.com/vents/vents29.jpg
lebaron hood vents, they are made of fiberglass

i paid $35 for my pair hope to get them installed over vacation

95 ZJ
12-10-2004, 01:50 AM
Damn that is an ugly grill on the ZJ in the pic above. I don't see how those 5.9 hoodvents do much good, they look to small and they are placed all the way over to the side of the hood. Just cut a big square hole in the hood and don't cover it up at all for maximum air flow and increased horse power :wink:

chadjans
12-10-2004, 02:33 AM
http://fototime.com/79DB8493427FAB3/standard.jpg
http://fototime.com/66C1F2C852C43A6/standard.jpg
http://fototime.com/AD38FC1C306B900/standard.jpg



CarParts.com 96 pontiac Grand Prix (supercharged edition)
$80 each
OSH for Nylon Spacers Under $5
and get a local painter.


Thats what I did.

AW

Too rich for my blood

chadjans
12-10-2004, 02:34 AM
http://www.ericsxj.com/vents/vents29.jpg
lebaron hood vents, they are made of fiberglass

i paid $35 for my pair hope to get them installed over vacation

Those things are huge. I like

Chad

AprilzWarrior
12-10-2004, 03:24 AM
Damn that is an ugly grill on the ZJ in the pic above. I don't see how those 5.9 hoodvents do much good, they look to small and they are placed all the way over to the side of the hood. Just cut a big square hole in the hood and don't cover it up at all for maximum air flow and increased horse power :wink:



Thanks for the love http://users.pandora.be/IMS/smileys/mad15.gif


As for the vents, they are not the 5.9's if you re-read my post :idea:
They measure (about) 14"x5"

and please cut a big hole in the hood :wink: Id love to see some pics. 8)

95 ZJ
12-10-2004, 05:16 AM
No problem I've got plenty of love to spare :D

I already did cut two big holes in the hood 8) works great!

When I mentioned the 5.9 vents I wasn't talking about yours I was talking about the actual 5.9 vents. They aren't very big and they are placed too far to the side for my liking.

AprilzWarrior
12-10-2004, 11:41 AM
Have you seen what they look like Under The Hood ?


All boxed in... I dont get them either. :)

95 ZJ
12-10-2004, 12:05 PM
So they're just for looks then? I didn't know that, that's dumb :?

LouisianaZJ
12-10-2004, 12:24 PM
the 5.9L vents suck air out at speed

the lewvers create a low pressure system over them which draws hot air out

nate
12-10-2004, 03:45 PM
Low pressure system? Am I on weather.com? :lol: ok, I thought it was funny.

Gary's Home Depot vents did turn out pretty darn good. He came over the house one day and said, "hey want to help me install these?" I'm thinking ok this is pretty damb ghetto, but hey, it's not my Jeep, so sure I'll cut up that hood for you :D

Oh, BTW Gary... I think it cost more than $6. Remember you had to buy me a new pair of safety glasses after you smashed mine? And the sawzall blades you broke... and the cut off disk for the grinder? :shock:

http://mallcrawlin.com/phpBB/viewtopic.php?t=111

95 ZJ
12-11-2004, 01:28 PM
That's true but the actual cost of the vents was like $6. The other stuff wouldn't be a cost involved for anyone else trying this unless they were as mechanically handicapped as me :(

Swamp boy
12-12-2004, 10:44 PM
I bought a new hood at Certi-fit for $67 and used a set of Pontiac Z34 vents.. I put them directly over the headers.. You should see the heat coming out of there at red lights... :shock:



http://216.77.188.54/coDataImages/p/Groups/94/94531/folders/169383/1244823IMG0019.jpg

This is a picture of the inside from when I first did it... I cleaned it up some since then....

http://216.77.188.54/coDataImages/p/Groups/94/94531/folders/169383/1247378IMG0007.jpg

chadjans
12-13-2004, 02:52 AM
http://www.imagestation.com/picture/sraid150/pd14152f4d2fc0bb7a5824a6123ba62cf/f5ed6d49.jpg

http://www.imagestation.com/picture/sraid150/pd8e7a34e1a63d158e2a8cd93875cd709/f5ed6d3d.jpg

http://www.imagestation.com/picture/sraid150/p4c191b7560f67a4971ee8a164879ae2c/f5ed6d30.jpg

http://www.imagestation.com/picture/sraid150/p12c0d2e661fc2af70d1b7933458d597c/f5ed6d21.jpg

http://www.imagestation.com/album/?id=2134157966

OverkillZJ
12-13-2004, 11:31 AM
This should be good :lol:

KevinM
12-13-2004, 06:29 PM
DOOD, THIS IS GOING TO BE UGLY....DON'T DO IT CHAD!!

Kraqa
12-13-2004, 11:08 PM
hey chad, i think you should leave em green it will go well with your pussy lip pink interior. i think those will look sweet on your truck tho. can't wait to see the drains.........i mean vents installed.

jsteves
12-13-2004, 11:32 PM
Have you seen what they look like Under The Hood ?


All boxed in... I dont get them either. :)

On my dad's 5.9 we took the box thingies underneath off, now we see the heat coming out of them as well.

I agree they would work better over the headers but where they are they do work, we have never had any probs. with the 5.9 overheating with stock t-stat, radiator, and water pump...i really like yours too AW

chadjans
12-14-2004, 12:02 AM
DOOD, THIS IS GOING TO BE UGLY....DON'T DO IT CHAD!!

I think they will look better than the ac registers I thought about doing. They will have no exposed screws.

Chad

chadjans
12-14-2004, 12:04 AM
hey chad, i think you should leave em green it will go well with your pussy lip pink interior. i think those will look sweet on your truck tho. can't wait to see the drains.........i mean vents installed.

http://img.photobucket.com/albums/v280/Kraqa/thefinger.gif

Nah got some plastic paint, going to shoot them white. Just can't decide where I am going to put them and how many.

Chad

jpmtx
12-14-2004, 12:09 AM
DOOD, THIS IS GOING TO BE UGLY....DON'T DO IT CHAD!!


:cry: :cry: :cry: Don't do it, Chad! :cry: :cry: :cry:

OverkillZJ
12-14-2004, 12:31 AM
Do it, but paint them inferno red like the inside :twisted: 8) :shock:

chadjans
12-14-2004, 12:48 AM
Do it, but paint them inferno red like the inside :twisted: 8) :shock:

Ahu Tuna red

OverkillZJ
12-14-2004, 01:16 AM
Do it, but paint them inferno red like the inside :twisted: 8) :shock:

Ahu Tuna red

Just think, if you install metal drain grates instead, you could even COOK tuna on your hood when the engines running hot!

Mmmmm.... engine flavored tuna....

chadjans
12-14-2004, 06:30 PM
http://www.imagestation.com/picture/sraid150/p4a37855d8bab99f548b17dbc1146ff08/f5e811ba.jpg

http://www.imagestation.com/picture/sraid150/pe5e63e2bf818b81a4222324f30984cb5/f5e811a2.jpg

http://www.imagestation.com/album/?id=2134157966

Chad

Kraqa
12-14-2004, 08:17 PM
go with the four. i think the four looks waaaaayyy better./

nate
12-14-2004, 09:11 PM
I concur.

OverkillZJ
12-14-2004, 10:14 PM
Another vote for 4. If you're gonna do it, do it right ;)

robselina
12-14-2004, 10:26 PM
what year hood is that? never noticed one with an off center 'hump'

chadjans
12-14-2004, 11:04 PM
93. No off center hump. It dips in the middle.

Chad

chadjans
12-14-2004, 11:06 PM
go with the four. i think the four looks waaaaayyy better./

Have to see if there is room. I know there is room for two, but I don't know about four. Have to pull the inner hood liner and start measuring up. Not willing to cut the inner structure.

Chad

LouisianaZJ
12-14-2004, 11:35 PM
go with the four. i think the four looks waaaaayyy better./

Have to see if there is room. I know there is room for two, but I don't know about four. Have to pull the inner hood liner and start measuring up. Not willing to cut the inner structure.

Chad
look at swampy's pic
looks like you will have to gut the cross rail things
http://216.77.188.54/coDataImages/p/Groups/94/94531/folders/169383/1247378IMG0007.jpg

robselina
12-14-2004, 11:58 PM
93. No off center hump. It dips in the middle.

Chad

my bad. bit of an optical illusion there plus I just had an eye exam so my pupils are all dialated and crap

/ end sorry ass excuse

Kraqa
12-14-2004, 11:58 PM
http://img.photobucket.com/albums/v280/Kraqa/randoms/vents.jpg

problem solved!!

http://img.photobucket.com/albums/v280/Kraqa/thefinger.gif

chadjans
12-15-2004, 01:53 AM
If I do four, I'd like to get them into the triangles closest to the wind shield, staying away from the center triangle.

Chad

chadjans
01-05-2005, 08:51 PM
Drilled the holes:

http://www.imagestation.com/picture/sraid153/pcd4c35205d1e9a9befe03c36fc73c2f8/f599113a.jpg

http://www.imagestation.com/picture/sraid153/pd493890a15f36996a69db462d55b38b2/f59910cb.jpg

http://www.imagestation.com/picture/sraid153/pad516ebbe15b9464ee7393287bf46b33/f599107b.jpg

http://www.imagestation.com/picture/sraid153/p8ddac15b5a2a6ace7988eb4d9f071614/f5990f88.jpg

http://www.imagestation.com/picture/sraid153/p6137ec7029af7d77f2305933d5daedb1/f5990f37.jpg

http://www.imagestation.com/picture/sraid153/p3b0fb9cd2c60eb26fa8f927f14f52b9f/f5990e46.jpg

http://www.imagestation.com/picture/sraid153/pb3a75dd1eb5e0108186d30b5e71166a7/f5990d00.jpg

http://www.imagestation.com/picture/sraid153/pc110e394e0a58496c5369332ae7c8de4/f5990c58.jpg

http://www.imagestation.com/picture/sraid153/pc7647e805a8222754c05c206a1b291c3/f5990bfd.jpg

http://www.imagestation.com/picture/sraid153/p2761662718b89ab6dac5b9b9dcbe13bf/f5990b73.jpg

http://www.imagestation.com/album/?id=2134157966

Chad

KevinM
01-06-2005, 04:33 PM
Chad, looks like someone stuck drain covers in your hood!!! You should find the person who did that...... :D



Are those large enough to make any difference?

chadjans
01-06-2005, 10:05 PM
More than enough hot air comes out of them. I'd be wlling to bet they flow the same amount of air as 5.9 and GTP pontiac vents because they have no louvers blocking them.

Chad

OverkillZJ
01-07-2005, 12:22 AM
Not too shabby!

KevinM
01-07-2005, 11:10 AM
More than enough hot air comes out of them. I'd be wlling to bet they flow the same amount of air as 5.9 and GTP pontiac vents because they have no louvers blocking them.

Chad

That's true, anyway they are in a better place. Right over the engine instead of over the battery/airbox.

Kraqa
01-08-2005, 01:01 AM
thats sexy.

nate
01-12-2005, 10:37 AM
Nice. Any reason you didn't go with 4 like you had layed out in some pics?

chadjans
01-12-2005, 03:35 PM
Too many holes and it seemed overkill.

Chad

Texas ZJ1
02-04-2005, 12:16 AM
I just like the detailed pics you took so if I wanted to say, put the lund scoops on, I could follow your pics.

Hunter

death-mobile
08-29-2006, 08:50 PM
What would be a good vent for a WJ?

LouisianaZJ
08-29-2006, 09:12 PM
anything fairley small. you prolly have alot of hood sup[ports like the ZJ

LouisianaZJ
08-29-2006, 09:15 PM
btw, i did finally get those lebaron hewd vents on my ricer

http://img104.exs.cx/img104/1358/hoodvents_1786.jpg
http://img152.exs.cx/img152/367/rti13tm.jpg
:smt025

death-mobile
08-29-2006, 09:23 PM
those are cool...where did you get those? run any cooler?

chadjans
08-29-2006, 10:44 PM
Rise of the dead post.

DJJordache
08-29-2006, 11:41 PM
old post indeed! but just in case anyone is wondering here are a few pics of hte 5.9L hood vents to show the SMALL holes!

http://memimage.cardomain.net/member_images/7/web/151000-151999/151822_21.jpghttp://memimage.cardomain.net/member_images/7/web/151000-151999/151822_22.jpg
http://memimage.cardomain.net/member_images/7/web/151000-151999/151822_23.jpghttp://memimage.cardomain.net/member_images/7/web/151000-151999/151822_24.jpg

and a OLD pic of mine with the Pontiac GTP vents with no bottoms and I cut out the LARGE hole for the vents and they really flow some HOT air
http://memimage.cardomain.net/member_images/7/web/151000-151999/151822_19_full.jpg

LouisianaZJ
08-30-2006, 12:50 AM
nice fog lights

TrojanMan
08-30-2006, 01:35 AM
More than enough hot air comes out of them. I'd be wlling to bet they flow the same amount of air as 5.9 and GTP pontiac vents because they have no louvers blocking them.

Chad

I'm wondering if the louvers actually direct the air flow better which would cause a higher pressure differential which would suck out more air.

chadjans
08-30-2006, 01:39 AM
Hell if I know. I have since added two more vents (four in total) removed the cowl plastic, front underhood weather stripping, windshield and windshield wiper crap. So it all flows good.

Chad

DJJordache
08-30-2006, 10:52 AM
AerodynamiX:
lol if you really want people to stare at you with the WTF look on their face:
Tape 5" pieces or yard all over your hood to see where the low pressure areas are at speed. I did this and ended up with where they are as kind of a compromise between low pressure area and not having to cut the hood supports. After I installed the vents I put some yarn on the vents and there is some good air flow out of them at speed now. So since there was a low pressure area in that spot before, by putting vents in after it encourages the hot engine air to flow out of the vents when at speed.... or at least it did on my with my ghetto wind testing:D

CurtP
08-30-2006, 11:25 AM
nice fog lights
They go well with the brush guard.

DJJordache
08-30-2006, 11:36 AM
nice fog lights

They go well with the brush guard.
yeah yeah yeah I knew I'd get some shit for them:D The lights are full of water and are dead so I'm pulling them off soon, and I'm waiting for a buddy to come back from college some weekend to put the brush gaurd on his ZJ. he has nerf bars too lol