My UIM/(porting)LIM replacement thread 56k beware - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-16-2007, 10:11 PM   #11
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Can I used the throttle body cleaner to clean off the fuel injector nozzles?
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Old 12-16-2007, 11:06 PM   #12
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im having a hell of a time figuring how to accurately port this thing. the paper stencil thing didnt work... to it being so flexible...
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Old 12-17-2007, 12:08 AM   #13
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Yes, TB cleaner is the best thing to clean injector nozzles, but there'* no point. Gas squirting out of there at 50 psi keeps them clean. Forget the PCV gunk. It'* not hurting you.

The ports on the LIM should already be the right height and width at the widest and tallest points. You STRAIGHTEN the edges to those points. Not more than .9 by 1.9 inches. Preferably a TINY bit less in width and height.
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Old 12-17-2007, 12:28 AM   #14
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I got it . One anyway lol. I cut it, threw it on the motor (after cleaning it off with air, ofcourse)with the gaskets on, and did it until I didn't feel any overlap. I threw it on about 5 different times just to check, because I'm a perfectionist.

Here'* the first port done:

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I think I'm going to finish the LIM, and call it a night. I have to go to work at 8 am lol.

I'll do the rest tomorrow.
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Old 12-17-2007, 12:33 AM   #15
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Outlet looks pretty good there. You'll want to 'clean it up' all the way up to the UIM inlet end.
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Old 12-17-2007, 01:52 AM   #16
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LIM is done, and it'* bedtime. Tomorrow begins re-assembly. I would like to clean the LIM up a little bit more as well before I start re-assembly tomorrow. I've also decided that I'm going to run the engine for about 3 minutes before I shut it off and go ahead to drain the oil. That way, any little metallic pieces lurking in there, as well as any coolant that could have made it'* way in there, will come out with the warm oil.

During the first 100 miles of the drive, I'm going to get out about every ten to make sure there'* no coolant in the oil. That'* like a personal fear of mine lol.

Man, that throttle body cleaner got to me. I couldn't tell when I was just standing there, but sitting here typing is making me feel dizzy and crap. Guess it was a good idea to call it quits.

Nite.
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Old 12-17-2007, 10:02 AM   #17
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Flush the LIM out with hot water. Very hot. It'll lighten up the oil and gunk that may trap particles. Coolant and intake passages alike.

Let'* see some finished pics from both the top and bottom.
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Old 12-17-2007, 11:01 AM   #18
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Alright, it'* morning, I'm going back down to start it right after I have a balanced, healthy breakfast. Or... eggs and bacon w/ fried potatoes lol. Leftovers...

Anywho, I will take pictures as soon as I'm sure all the cuts made were straight, and inside is smooth as far as bumps and extrusions. I had a heck of a time getting the dremel all the way in there. I ended up using the sanding drum as far as I could, then I used tb cleaner with a brass wire brush to touch up the rest.

As for the coolant reservoir, any idear how to get the rest of the rusty particles out? The prestone cleaner stuff I put in last week really helped, but there'* still a few particles in there. I've filled it with boiling hot water and vinegar about three times, shake vigorously, and each time I get a little more sediment. But it'* not really taking off as much as I'd like. I was thinking bleach, but I didn't possibly want to leave residue behind that may harm the engine. If bleach can harm hands and clothes, then I'm sure it has some kind of negative affect on aluminum and steel. Any input on that would be great.

I'll post pics of the LIM next, after I get it all nice and clean.
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Old 12-17-2007, 11:03 AM   #19
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Bleach or Castrol Super Clean on the reservior. Rinse well when done. Use a bottle brush if you need to. Let it soak, and shake it every now and then. You have time.

Bleach and Castrol won't harm the plastic or remain in the pores after rinsing.
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Old 12-17-2007, 12:45 PM   #20
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Reservoir is soaking, LIM is done and ready to be re-assembled. I'm glad I double checked myself from last night. There were a few edges that were cut, but it was just the edges, it didn't actually go into the LIM lol. The carbide bit is toast. Towards the end it started getting real dull, and it skipped out of the hole once

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It'll be iite lol. You can't feel it when you rub your finger over it. Glad I got the tapered bit and not the straight bit. I have a funny feeling I'd be looking for a new LIM lol.

Here'* the rest of the LIM after sanding and dipping in tub of hot steaming water for ten min. Then I took the brass brush to it again, just to make sure it was clean. Brush is now toast aswell, and my fingers are the color of aluminum even after thorough washing lol.

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And reassembly begins. In two and a half - three hours, I should be done .
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