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 Jeep Compass 4WD L4-2.0LFACTORY OEM SERVICE PROCEDURE
Piston, Engine
PISTON
Piston Diameter
A 85.995 - 86.015 mm (3.3856 - 3.3864 in.)
B 86.005 - 86.025 mm (3.3860 - 3.3868 in.)
C 86.015 - 86.035 mm (3.3864 - 3.3872 in.)
Clearance to Bore (-0.015) - 0.015 mm ((-0.0006) - 0.0006 in.)
Weight 345 - 355 grams (12.17 - 12.52 oz.)
Land Clearance (Diametrical) 0.60 - 0.73 mm (0.0236 - 0.0287 in.)
Piston Length 49.0 mm (2.929 in.)
Piston Diameter
A 85.995 - 86.015 mm (3.3856 - 3.3864 in.)
B 86.005 - 86.025 mm (3.3860 - 3.3868 in.)
C 86.015 - 86.035 mm (3.3864 - 3.3872 in.)
Clearance to Bore (-0.015) - 0.015 mm ((-0.0006) - 0.0006 in.)
Weight 345 - 355 grams (12.17 - 12.52 oz.)
Land Clearance (Diametrical) 0.60 - 0.73 mm (0.0236 - 0.0287 in.)
Piston Length 49.0 mm (2.929 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.