Water pump torque and sequence

1998 BUICK RIVIERA
141,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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INTOSILENCE1
  • MEMBER
  • 79 POSTS
I need the torque specs and correct sequence for tightening the bolts to the water pump. There are 4 thinner short bolts, and 4 thicker longer bolts. Thanks.
Oct 31, 2020 at 5:17 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,295 POSTS
The bolts are all tightened to 20 lb ft. or if you have a torque angle gauge you torque them all to 11 lb ft and then tighten an additional 80 degrees. The pulley bolts are torqued to 116 inch pounds. There is no set pattern on the pump bolts but you can use a simple cross pattern if you wish, just pick a bolt as a starting point.
Oct 31, 2020 at 7:15 PM
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