Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2009 Pontiac Torrent FWD V6-3.4LFACTORY OEM SERVICE PROCEDURE
Piston, Engine
PISTON CLEARANCE
Piston to Bore Clearance
Production - 1-4 0.17-0.053 mm (0.0006-0.0020 in)
Service Limit- 1-4 0.093 mm (0.0036 in)
Production - 5-6 -0.008-+0.048 mm (-0.0003-+0.0018 in)
Service Limit- 5-6 0.093 mm (0.0036 in)
PISTON DIAMETER
Production - Cylinder 1-4 91.985-92.003 mm (3.621-3.622 in)
Service Limit - Cylinder 1-4 91.945 mm (3.619 in)
Production - Cylinder 5-6 91.99-92.028 mm (3.621-3.623 in)
Service Limit - Cylinder 5-6 91.945 mm (3.619 in)
Piston to Bore Clearance
Production - 1-4 0.17-0.053 mm (0.0006-0.0020 in)
Service Limit- 1-4 0.093 mm (0.0036 in)
Production - 5-6 -0.008-+0.048 mm (-0.0003-+0.0018 in)
Service Limit- 5-6 0.093 mm (0.0036 in)
PISTON DIAMETER
Production - Cylinder 1-4 91.985-92.003 mm (3.621-3.622 in)
Service Limit - Cylinder 1-4 91.945 mm (3.619 in)
Production - Cylinder 5-6 91.99-92.028 mm (3.621-3.623 in)
Service Limit - Cylinder 5-6 91.945 mm (3.619 in)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.