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| Matatk | IAC / coolant passage modification. | ||
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Webmaster
 
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I already have the TB bypass done on my car. With my new Accel throttle body I wanted to eliminate the coolant nipples so I was going to cut them off and JB weld the holes for cosmetic reasons. Then vetteoz posted a picture for me showing how to cut off the coolant passage area and leave only the IAC. Looked good so I decided to do that.
Here is the picture he posted:  Here's what you will start with:  I had already cut the coolant nipples off prior to this project, so here's what it looked like with the bottom piece removed:  I guesstimated and marked a rough cutout area with a sharpie. Turns out that was a bit too big and I had extra material to trim off later. But I'd rather cut it too big than accidentally cut into the IAC passage and render it useless.  I drilled a couple holes in a 2x4 so that I could lay the piece flat (there are locator pins in the bottom) and it would be stable. Then I went to work with a cut off wheel. Not the best tool for this project, but it worked ok. A band saw would be ideal, but oh well. After initial cutout:   I slowly cleaned up the edges with the cut-off wheel and then used a straight grinder with a roll sander to smooth it out:  Here is a comparison of the TBs. As you can see, the Accel doesn't have a provision for the coolant passage anyway:  I tried cleaning this thing with brake cleaner, scotchbrite, napa aluminum brightener. Still looked like crap. So I shot it with some high temp cast aluminum color engine paint:   I'll make a gasket later, and it's good to go. Should look a lot cleaner without the extra junk sticking out from underneath the TB. Matthew |
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Posted on: 2012/8/12 13:07
Edited by Matatk on 2012/8/12 15:16:55 |
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
 
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Do you make your gaskets with a small ball peen hammer? Just askin' . |
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Posted on: 2012/8/12 13:25
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| Matatk | Re: IAC / coolant passage modification. | ||
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Sorry, I don't get it. |
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Posted on: 2012/8/12 15:17
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Old school stuff.
Place the gasket material on the part. Take a fairly small ball peen and tap around all the surfaces that need to be cut out. This will give you a perfect imprint of the gasket you need to cut. Works especially well on holes that you can't see when you put the gasket material on the part. If it was a steel part, you could actually do the complete cut with the hammer. |
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Posted on: 2012/8/12 15:23
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| bogus | Re: IAC / coolant passage modification. | ||
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Grand Imperial Pooh-Bah
 
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the IAC housing is made of pig metal... ain't no cleaning that garbage.
The finished piece looks GREAT!!!! The paint was brilliant, looks better than new. Way to go! Also, you can use hi-tack to outline for a gasket. And finally, you can use right stuff straight out the of the can. Let it skin over for 5-10 minutes, then put it on. Should be a-ok. Remember, it is no longer protecting coolant on one side and vacuum on the other. |
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Posted on: 2012/8/12 18:52
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Interesting about the ball peen hammer thing....never knew that. I will use a sheet of victor reins gasket material. I used the right stuff on the last jacket housing with good results.
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Posted on: 2012/8/12 20:07
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| pianoguy | Re: IAC / coolant passage modification. | ||
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Guru Emeritus
 
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Looks great, Matt! I must qualify for old-school - I remember using a ball-peen hammer to make a gasket decades ago.
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Posted on: 2012/8/12 22:06
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1996 LT4 �Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.�- Jack Handey |
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| flyboy | Re: IAC / coolant passage modification. | ||
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Elite Guru
 
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Too much time on your hands.
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Posted on: 2012/8/13 2:01
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'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Quote:
Yeah, if only I were retired with a brand new Corvette, then I'd just drive it around and never have to fix anything  |
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Posted on: 2012/8/13 12:37
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| volzfan | Re: IAC / coolant passage modification. | ||
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Senior Guru
 
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Quote: BillH wrote: Quote: Bill, you don't really expect these young folks to know about these things, do you? The first time Trae saw me do that, I know he thought I was crazy...........now he knows the technique! |
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Posted on: 2012/8/13 14:33
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'98 Coupe, LS1, Corsa Pace Car Exhaust, WCC "X-Pipe", Blackwing CAI, C6 Z-06 wheels, Custom two tone (Pewter/Black) Seat Skins from "Corvette Originals" Vettes of the Smokies |
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Quote:
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Posted on: 2012/8/13 15:54
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| bogus | Re: IAC / coolant passage modification. | ||
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Grand Imperial Pooh-Bah
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meh... all these old fogies trying to break bad with us... I say befuddle them! Give them an iPhone without the instructions! ha! That'll shut'm up.
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Posted on: 2012/8/13 16:30
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| flyboy | Re: IAC / coolant passage modification. | ||
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Elite Guru
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Quote:
Thought small ball peen hammers were for breaking kneecaps. |
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Posted on: 2012/8/13 17:08
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| Matatk | Re: IAC / coolant passage modification. | ||
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Webmaster
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This guy is hilarious:
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Posted on: 2012/8/13 17:49
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| screamin_conure | Re: IAC / coolant passage modification. | ||
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Senior Guru
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Quote:
That's AWESOME! Remember that word, "purfek"! Love it! Nice job on the IAC too Matt! I'm always amazed by people who those types of fabrication skills. Very nice work. |
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Posted on: 2012/8/13 18:16
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Quote:
No iPhone, no watch, no schedule...life is good. |
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Posted on: 2012/8/13 18:54
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Quote:
Nah, that's a baseball bat. |
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Posted on: 2012/8/13 18:54
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Tomorrow's lesson:
How to make antifreeze from urine.
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Posted on: 2012/8/13 18:58
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Every man dies but not every man lives. |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Webmaster
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Quote:
It's either one or the other....urine or urout |
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Posted on: 2012/8/13 19:26
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Webmaster
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Quote:
Thanks for the kind words....but these are just basic hacking skills....I really have respect for the guys that weld and fabricate from bare materials! |
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Posted on: 2012/8/13 19:34
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Quote:
Thank You.  Anyway, you mentioned using a drum sander, are you using in your drill press? |
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Posted on: 2012/8/13 19:39
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Every man dies but not every man lives. |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Webmaster
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Quote:
No, straight die grinder on the air compressor. |
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Posted on: 2012/8/13 20:03
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_________________
2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| joeld | Re: IAC / coolant passage modification. | ||
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Guru
 
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Looks good Mat!
Really cleans up that area. Joel |
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Posted on: 2012/8/13 23:44
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1989 Coupe,L98 automatic |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Webmaster
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Quote:
Oh yeah, when I actually see you fabricate something other than supposed "winnings" from the casino, I'll shoot you a compliment |
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Posted on: 2012/8/14 1:08
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_________________
2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| Matatk | Re: IAC / coolant passage modification. | ||
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Quote:
Thanks! I'm also making a top plate out of some aluminum stock since I don't want it to say "tuned port injection" and I refuse to pay $25 on ebay. |
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Posted on: 2012/8/14 1:09
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| BillH | Re: IAC / coolant passage modification. | ||
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The Stig Moderator
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Quote:
I'm too busy right now with DNBFS and C2 frames to fab up something just for shits and giggles. I could post the tools I make, alignment gear, bump steer gauges etc. but that would require effort and effort can interfer with DNBFS. |
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Posted on: 2012/8/14 1:46
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Every man dies but not every man lives. |
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