Reinstalling UIM & LIM - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 08-08-2006, 05:42 PM   #1
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Default Reinstalling UIM & LIM

Hey Guys,
Need some advice... have removed UIM & LIM because of coolant loss. The egr port does not seem to be burned thru but there was coolant in both manifolds. Lower gaskets were not as bad as I expected. I just purchased the gm aluminum frame gaskets ($56), elbow ($7) and upper gasket kit ($30) and was searching for torque specs on the LIM. I could not find them. All I've seen is 89in/ib. for the upper and a 11ft/lb with no designation. Can you guys help me out? Also any advice on reassembly is appreciated. Waiting on Bob Dillion "special" to reinstall upper.
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Old 08-08-2006, 06:38 PM   #2
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Chilton'* 28200 gives 89 in-lb twice in sequence for the '95 lower, and 89 in-lb for the upper in sequence. For 96-99, it lists 11 ft-lb for the lower in sequence, and 89 in-lb for the upper in sequence. Threadlocker is recommended for the LIM bolts. I use threadlocker on the LIM and the UIM bolts.

BTW, take something sharp and strong like an awl, or a heavy needle, and poke the outside top of the UIM. Then try the same thing on the EGR bore, especially near the bottom, and see if it is as hard as the outside. Sometimes a coating of carbon hides rotten plastic.
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