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Help needed for some engine torque specifications.
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arscs
New User
Jan 28, 2017, 5:58 PM
Post #1 of 2
(1115 views)
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Help needed for some engine torque specifications.
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I have a Chevy Malibu from 2000 with a 3.1L V6 engine. I have a friend that is a truck mechanic that needs the torque specs for the main bearing and connecting rod caps. I have a Haynes repair manual for Chevrolet Malibu 1997 through 2003. It says that for 3.1L V6 engines there are two steps for tightening the main bearing and connecting rod caps. The first step is written in Ft-lbs units and the second in degrees. He doesn't quite understand what to do with these units.
For the main bearing caps it says:
step 1-> 37 Ft-lbs
step 2 -> Tighten an additional 77 degrees
Does this mean he should tighten for 37 Ft-lbs with the torque wrench and then turn an additional 77 degrees? Is it as simple as that? Thanks in advance for any help.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 28, 2017, 8:37 PM
Post #2 of 2
(1067 views)
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Re: Help needed for some engine torque specifications.
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That's because they are "Torque to Yield" bolts that actually are made to stretch.
You start out torquing them to 37 ft lbs, Then you tighten each one to 77 degrees of rotation. An entire circle is 360 degrees and a half circle is 180 so 77 is a little less than a quarter turn additional. They make tool to measure the exact degree of turn.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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