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Old 02-25-2007, 03:16 AM   #1
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Well it is a blizzard here this weekend so I finally decided to replace my LIM gaskets. WOW, what a job! It is fairly simple just very involved. I was a little intimidated when I had the entire top end of the motor pulled off!!! (see pics) Didn't I hear there was a class action lawsuit for the LIM gaskets?? The originals were plastic!!! I replaced them with the aluminum ones. Anyway, alot of things were corroded and needed to be replaced. As you can see in the second picture, the tubes that run from the throttle body, the supercharger, and even one that was down on the LIM all corroded and broke at the connections. Can I just buy a small piece of rubber tubing to replace the tips of these. After I get that fixed I just have to remember how they were routed!!! Thanks

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Old 02-25-2007, 12:18 PM   #2
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Some of them you can pick up at places like Autozone, Advance, or Pep Boys. You'll have trouble finding the "T" there, however. You can either make one by using various fittings, or buy them from the dealer.
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Old 02-25-2007, 12:27 PM   #3
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FYI, there isn't a problem with the LIM gaskets in a car that doesn't run DEX. There is a class-action lawsuit on DEX, not on the gaskets.

Series 1 cars don't have LIM gasket issues until well over 100k, and it'* minor then. DEX eats the plastic, so GM went to Aluminum gaskets, and rumor has it that they just recently re-formulated their DEX. It gets corrosive with age.

For your vacuum lines, try the dealer, a wrecker, or go custom with bulk vacuum line at your local auto parts store. As mentioned, the Tees will be more difficult. Are the Tees cracked? Or are they re-usable? If they're ok, you can insert a small piece of your OEM plastic into each one, then slip aftermarket vacuum tubing over them. Make sure you use VACUUM tubing. It'* designed not to collapse on itself under vacuum.
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Old 02-25-2007, 01:59 PM   #4
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The dex doesn't corrode the rubber vaccum fittings...

There'* a technique to wiggling and removing.
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Old 02-25-2007, 02:34 PM   #5
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Quote:
Originally Posted by BillBoost37
The dex doesn't corrode the rubber vaccum fittings...

There'* a technique to wiggling and removing.
I was talking about the DEX killing the LIM gaskets.
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Old 02-25-2007, 02:36 PM   #6
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Use vacuum splice connectors. They come in all shapes and diameters. What you do is take the rubber end pieces off the broken plastic tubing and replace it with a section of vacuum hose.

You can get these vacuum connectors in the 'T' configuration too.



https://www.dormanproducts.com/
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Old 02-25-2007, 08:24 PM   #7
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Part# 24508742 cost me $22.10 from the dealer. This will replace EVERY piece along the smaller line, not the big one that goes over the supercharger. silicone vacume hose is also a good looking replacement and can be had in various colors.
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Old 02-25-2007, 10:57 PM   #8
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Alright, I just turned on the car for the first time since replacing the LIM gaskets!! Everything was great except there is one vacuum line that I cannot find where it goes!!! It is really making me mad because I have looked everywhere for a fitting. I cannot get my camera to upload the pic.. However, I have the diagram from alldata and it is the line that goes from the fuel pressure regulator to a tee at the LIM and around the top of the valve cover. It ends up right next to the evap purge valve and on the diagram it shows it going to the map sensors! What/where are the map sensors!! I am sorry I cannot get my picture on here but I guess on my initial pictures, it is the bottom vacuum line pictured. Thanks for the help! I this is the last thing to do and it will be a complete success!!!!
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Old 02-25-2007, 11:03 PM   #9
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MAP sensor is on a bracket mounted to your LIM behind the SC. Rectangular in shape. Has a vac fitting and an electrical connector.
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Old 02-25-2007, 11:09 PM   #10
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Yeah, that is hooked up...I wish I could get this darn picture to download!!!!
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