The end of UIM deaths? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-20-2007, 04:04 AM   #21
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Quote:
Originally Posted by theJMFC
I had to bail out before the filling of fluids and startup, but wow. An intake job goes a lot faster when you've done one before. We probably only spent about 2 hours on actual R&R work (and 3 hours of driving to get parts and supplies that we forgot). The first time, we probably spent at least twice that...

I'll leave the fun details for mkaake to report, since I forgot my camera.
*bump!*

Any new updates on this, perhaps a howto? I will likely be planning on doing this (LIM/UIM gaskets and elbow) with my '99 SLE, as I have some seepage, and could use as best a roadmap as possible.

Thanks in advance.
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Old 11-20-2007, 08:41 AM   #22
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The How To is actually in Techinfo (link at top left of all pages).
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Old 11-29-2007, 01:45 AM   #23
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The How To is actually in Techinfo (link at top left of all pages).
Yeah, but that is all from 2006. I've been lurking for awhile and was real interested in how this alternative fix worked (closing off the passageways).

Perhaps getting a bit more info on how they closed them off, as well (I would be afraid to stuff dimes in the holes).
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Old 11-29-2007, 11:16 AM   #24
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Although you cannot tell it by the original posting date shown on the title page, the Techinfo article has been updated at least twice since it was originally posted in 2006. The information therein is accurate and up to date. Also, if you read the entire article, you will find links at the bottom describing more than one "how-to."

To read about how to plug the LIM to eliminate coolant flow through the UIM and throttle body, use the search feature under subject LIM and authors bob dillon and mkaake.
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Old 11-29-2007, 11:26 AM   #25
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1. Drill the lower out to 31/64"


2. Go to the auto parts store and buy some 1/2" oil gallery plugs. Clevite part number is 219-3169.

3. Using a blunt punch, gently tap the plugs into the holes you just drilled.

4. Cover the plugs with JB Weld.



5. You're done. Slobber the sh*tbox together. Use the new GM aluminum gaskets, of course.

If you're a belt and suspenders kinda guy, you can also plug the upper while you have it apart. The UIM passages as cast are .375. Use a 7/16" drill to go into the passages a short distance, then a 1/2" drill far enough to seat the plug. JB weld it. You're done.

(This UIM was also sleeved.)



As to icing, I think it'* extremely unlikely. The intake charge passes by that plastic ring far too quickly to be heated much, and if you look about 1" below the throttle body, you'll see a loop of the exhaust. That loop probably provides all the throttle body heat you're ever gonna need, unless you're motoring around north of the Arctic circle.
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Old 12-02-2007, 07:12 PM   #26
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Do any of you guys have cars that are running with this mod? Is there any down side to doing it this way other than the icing issue? I'm not too worried about that since I'm in North Carolina. I like the idea of doing it this way because it keeps the coolant out of the upper intake and it saves money.
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Old 12-02-2007, 07:15 PM   #27
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I installed one of Bob Dillon'* plugged UIM'* on EK98'* car. It was fine for the 6 months he drove it before he sold it. I drilled 'vent' holes in the passages afterwards to get a little convection cooling around there.
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Old 10-23-2008, 08:13 PM   #28
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WillWren, when you say you drilled holes in the passages to get a little convection cooling around there" Can you be more specific on the location of these new holes?

Regards,
James



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Originally Posted by willwren View Post
I installed one of Bob Dillon'* plugged UIM'* on EK98'* car. It was fine for the 6 months he drove it before he sold it. I drilled 'vent' holes in the passages afterwards to get a little convection cooling around there.
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