Front exhaust manifold

Tiny
FLIPPA334
  • MEMBER
  • 2010 BUICK LA CROSSE
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 132,000 MILES
Can someone show me and give me the part number for the front exhaust manifold on mth car I put in. Mines is cracked and I need to replace the original one that came on the car
Monday, August 11th, 2025 AT 2:26 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
GM says that both are the same part number 12608747. Replacement is straightforward, remove the heat shield, remove the O2 sensor, then the nuts for the converter. Then the bolts from the manifold. I generally like to drop the exhaust pipe so I can get more room on the bolts and the cat won't lower if the pipe is attached. Then clean the block. The new one goes on and torque the bolts to 7 ft lb, then to 15 ft lb. Start in the center and work outward using an X pattern. Cat to manifold nuts are 40 ft lb.
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Monday, August 11th, 2025 AT 7:08 PM

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