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.
Pistons, Piston Pins & Piston Rings Specifications
2004 Acura 3.5RLSECTION Pistons, Piston Pins & Piston Rings Specifications
PISTONS, PINS & RINGS
| Application | In. (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pistons | ||||||||||
| Clearance | ||||||||||
| Standard | 0.001-0.002 (0.02-0.04) | |||||||||
| Service Limit | 0.003 (0.08) | |||||||||
| Diameter | ||||||||||
| Standard (1) | ||||||||||
| "A" Or No Marking Piston | 3.5425-3.5429 (89.980-89.990) | |||||||||
| Service Limit | 3.5421 (89.970) | |||||||||
| "B" Piston | 3.5421-3.5425 (89.970-89.980) | |||||||||
| Service Limit | 3.5417 (89.960) | |||||||||
| Oversize | ||||||||||
| .010" (0.25 mm) | 3.5524-3.5527 (90.230-90.240) | |||||||||
| .020" (0.50 mm) | 3.5622-3.5626 (90.480-90.490) | |||||||||
| Piston Pins | ||||||||||
| Diameter | ||||||||||
| Standard | 0.8646-0.8648 (21.961-21.965) | |||||||||
| Service Limit | 0.8643 (21.953) | |||||||||
| Pin-To-Piston Clearance | -0.0002-0.0001 (-0.005-0.002) | |||||||||
| Rod Interference Fit | ||||||||||
| Standard | 0.0002-0.0006 (0.005-0.015) | |||||||||
| Service Limit | 0.0008 (0.020) | |||||||||
| Rings | ||||||||||
| No. 1 | ||||||||||
| End Gap | ||||||||||
| Standard | 0.010-0.016 (0.25-0.40) | |||||||||
| Service Limit | 0.028 (0.70) | |||||||||
| Side Clearance | 0.0022-0.0031 (0.055-0.080) | |||||||||
| Service Limit | 0.005 (0.13) | |||||||||
| No. 2 | ||||||||||
| End Gap | ||||||||||
| Standard | 0.016-0.022 (0.40-0.55) | |||||||||
| Service Limit | 0.033 (0.85) | |||||||||
| Side Clearance | 0.0012-0.0022 (0.030-0.055) | |||||||||
| Service Limit | 0.005 (0.13) | |||||||||
| No. 3 (Oil) | ||||||||||
| End Gap | ||||||||||
| Standard (2) | 0.008-0.028 (0.20-0.70) | |||||||||
| Standard (3) | 0.008-0.020 (0.20-0.50) | |||||||||
| Service Limit | 0.031 (0.80) | |||||||||
|
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RENDER: 1.0x
NO RELATED
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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.