Extra hole in air intake? - Defender Source
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  #1  
Old September 14th, 2013, 02:44 PM
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Andrew Clarke
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Extra hole in air intake?

Hi. What's the large hole in the bottom of the air intake for? I have an '86 110 that was converted from 2.5td to 200tdi by a previous owner. Years ago, before I knew about the gaping hole in my air intake, I took the truck through a fairly shallow stream and ended up hydrolocking my engine. Since then, it's been covered with duct tape and plastic bags. While I have things apart though, I'd like to sort this out properly. I just have no idea what it's for, what to hook it up to, or what part I can buy to cap it off.

Thanks,
- Andrew.
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  #2  
Old September 14th, 2013, 04:17 PM
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Quote:
Originally Posted by aclarke View Post
Hi. What's the large hole in the bottom of the air intake for? I have an '86 110 that was converted from 2.5td to 200tdi by a previous owner. Years ago, before I knew about the gaping hole in my air intake, I took the truck through a fairly shallow stream and ended up hydrolocking my engine. Since then, it's been covered with duct tape and plastic bags. While I have things apart though, I'd like to sort this out properly. I just have no idea what it's for, what to hook it up to, or what part I can buy to cap it off.

Thanks,
- Andrew.
Once upon a time a hose came off that and went to the grate in the rear of the lf wing on 200 tdi's. Its where a snorkle hose would attach if you care to go that route. How does your engine get any air with that sealed off ?
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  #3  
Old September 14th, 2013, 05:12 PM
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Wouldn't it suck through the bottom pipe pointing down?

On our conversions, we use an early 90s Chrysler 5th Ave air filter box. Tucks in nicely inside the wing and bolts to the galvanized splash guard completely out of the way.
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  #4  
Old September 14th, 2013, 05:17 PM
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Quote:
Originally Posted by rdavisinva View Post
On our conversions, we use an early 90s Chrysler 5th Ave air filter box. Tucks in nicely inside the wing and bolts to the galvanized splash guard completely out of the way.
Pics? Would be interested in seeing how it looks and fits.
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  #5  
Old September 14th, 2013, 07:18 PM
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I had the snorkel attached to the hole you can see on the top right, pointing up. Originally I didn't have a snorkel, but I didn't know there was a hole on the bottom, just waiting for water to splash up into it.

After "the incident", I installed a Safari Snorkel, as I said, onto the top hole. I sealed off the bottom hole with a plastic bag.

I still don't understand why the box would need two intakes. Was the other hole supposed to go somewhere, or what's the deal? I've looked at hardware stores for some sort of plumbing cap or something to go on there, but have never been able to find something the correct size.

Thanks again,
- Andrew.
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Old September 14th, 2013, 07:31 PM
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That diagonal hole is what is known as a SPOT. Stupid Previous Owner Trick. The one pointing down is the factory port and the diagonal one is some bodged up shite somebody welded on there. Best bet, cut it off and weld a plate over it.
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  #7  
Old September 14th, 2013, 09:34 PM
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Quote:
Originally Posted by Ren Ching View Post
That diagonal hole is what is known as a SPOT. Stupid Previous Owner Trick. The one pointing down is the factory port and the diagonal one is some bodged up shite somebody welded on there. Best bet, cut it off and weld a plate over it.
I cannot conceive of a problem with the air box for which the solution would be to add a second intake. But OK, I guess it happened. It's off to the welder I go. Thanks!
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Old September 14th, 2013, 10:01 PM
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I know what you mean. On mine a previous owner cut the port in half perpendicular to the box so it was c shaped. Maybe thought it would let more air in or something
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  #9  
Old September 15th, 2013, 08:29 AM
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Chrysler/Fiat's new thing is to have dual air intakes called "Multiair". in the new Dodge Dart and Fiat 500. The previous owner was just ahead of the curve, LOL
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Old September 15th, 2013, 01:23 PM
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Air intake? Are you talking about the air filter housing? If so, the bottom hole is for a water drain, which should have a rubber drain cap on it with a slit type of opening- water can drain down, but no water gets in if going for a swim.......

Tim
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  #11  
Old September 15th, 2013, 03:22 PM
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Quote:
Originally Posted by skrufy View Post
Air intake? Are you talking about the air filter housing? If so, the bottom hole is for a water drain, which should have a rubber drain cap on it with a slit type of opening- water can drain down, but no water gets in if going for a swim.......

Tim
If you look at my photo, you'll see the small drain hole you're talking about, with the nipple on it. You'll also see two large intake holes. The second one of those is the one I'm talking about.
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Old September 16th, 2013, 12:16 AM
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Andrew-

Sorry, my mistake. The thumbnail pix of the extra huge and continuous Titanic sized intake hole didn't open up for me for some unknown reason.... When I asked the question, everybody else knew what you were talking about, but not me..... oh well. The drain hole with it rubber drain cap is easily seen as well..... As far as getting it welded up, I assume your welding guy will TIG-it, that metal is pretty thin for a MIG welder unless you run some real thin wire, and know what you are doing. For small stuff like that, the TIG weld will look better anyway.... Please post some "after" pix.....

Tim
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  #13  
Old September 16th, 2013, 08:16 AM
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Quote:
Originally Posted by skrufy View Post
Andrew-

Sorry, my mistake. The thumbnail pix of the extra huge and continuous Titanic sized intake hole didn't open up for me for some unknown reason.... When I asked the question, everybody else knew what you were talking about, but not me..... oh well. The drain hole with it rubber drain cap is easily seen as well..... As far as getting it welded up, I assume your welding guy will TIG-it, that metal is pretty thin for a MIG welder unless you run some real thin wire, and know what you are doing. For small stuff like that, the TIG weld will look better anyway.... Please post some "after" pix.....

Tim
Haha no problem. There's a fabricator nearby I used for another small job, so I'll see if they're willing to do this, and fab up some brackets for my raised air intake. I'm going to keep the side intake and blank off the bottom one, as it makes fitting the intake hose easier.
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Old September 16th, 2013, 10:00 AM
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Fyi

FYI, the bottom hole is factory
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  #15  
Old September 16th, 2013, 10:05 AM
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Quote:
Originally Posted by roverman2010 View Post
FYI, the bottom hole is factory
Yeah, but the side hole looks like it's going to fit more easily with my Mantec kit raised air intake kit.
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Old September 16th, 2013, 10:46 AM
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twin snorkels/intakes?


when I had my last 90, i had the boost cranked up HIGH (24/28 psi IIRC) and needed two intakes to let it breathe better.
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Old September 16th, 2013, 11:01 AM
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Quote:
Originally Posted by Capt Milks View Post
Chrysler/Fiat's new thing is to have dual air intakes called "Multiair". in the new Dodge Dart and Fiat 500. The previous owner was just ahead of the curve, LOL
New thing?
Take a look at any 1970 Hi Performance "Chrysler/Fiat" (Plymouth/Dodge). Single four barrel 383 and 440 engines had dual air intakes. Multi-carbed engines and single 4 barrel cars with hood mounted fresh air induction systems from that era had open air cleaner elements. (Chev and Ford had similar offerings.)

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  #18  
Old September 16th, 2013, 11:02 AM
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Quote:
Originally Posted by diesel_jim View Post
twin snorkels/intakes?


when I had my last 90, i had the boost cranked up HIGH (24/28 psi IIRC) and needed two intakes to let it breathe better.
Maybe, but there's no evidence of the truck ever having a snorkel before I added one. I have a full-length Allisport intercooler, a slightly reworked turbo and tweaked fuel/air, and I've never gotten the impression that my vehicle was starved for air through a single Safari Snorkel.
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