APN , DORMAN , MOTORMITE replacement upper intake ( UIM) - 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 02-07-2008, 09:47 PM   #21
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Quote:
Originally Posted by rkpatt
Throttle body ( TB) gasket too ?
Yup. Everything you need to do the upper half of the motor.
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Old 02-07-2008, 10:11 PM   #22
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Yes, the TB gasket is included with the APN.
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Old 02-08-2008, 04:53 PM   #23
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Another question - What are the torque specifications for the new style GM alumimun frame LIM ( lower intake manifold ) gaskets 3.8 L36 ?
- Thanks

Edit - I found some more info on the procedure at with some diagrams from GM --

http://www.gminsidenews.com/forums/*...ad.php?t=60606
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Old 02-08-2008, 06:18 PM   #24
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11 ft-lb in proper sequence. Someone will have an illustration of the sequence which is typically starting from the center of the piece, alternating sides, working out to the ends. Best to work up to the spec in two or three passes. Use blue loctite on the cleaned bolt threads.
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Old 02-08-2008, 10:17 PM   #25
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Old 02-09-2008, 01:21 AM   #26
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What'* that 80 and 90 degrees stuff? Never heard of that as a torque value.
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Old 02-09-2008, 02:58 AM   #27
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Quote:
Originally Posted by Barry
What'* that 80 and 90 degrees stuff? Never heard of that as a torque value.
Torque to yield bolts usually have "angle torque" tightening specs like those. Basically, you snug them up to some pre-load then turn the head of the bolt another (n)degrees. In some applications, the total angle is achieved in several passes through the sequence. With torque to yield bolts, this brings you into the range where the bolt begins to stretch. Clamping force achieved with TTY bolts is more evenly distributed than can be obtained by relying on the torque value alone. Torque values are greatly affected by the condition of the bolt and the type of lubricants used on the threads. Almost all cylinder head bolts are now done this way.
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Old 02-09-2008, 11:33 AM   #28
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Thanks Bill. It appears that water pump bolts are TTY. Does that mean they should be replaced if I replace the water pump?
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Old 02-09-2008, 03:31 PM   #29
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Quote:
Originally Posted by Barry
Thanks Bill. It appears that water pump bolts are TTY. Does that mean they should be replaced if I replace the water pump?
Don't say I said so, , but depending on the application, most TTY bolts can be re-used. For critical applications like head gaskets, I almost always buy new bolts. But the last Lexus cylinder head I did I re-used the TTY bolts because the factory service manual permitted it. Don't sue me when your water pump falls off, but I have never bought new bolts for a water pump.
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Old 02-09-2008, 06:29 PM   #30
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I don't know where that table Archon posted came from, but I checked my FSM and there is no indication the bolts for the Water Pump are TTY. It does have two sets of bolts that have different torque ratings.

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