Cylinder Head Specifications

2004 Acura 3.5RLSECTION Cylinder Head Specifications
CYLINDER HEAD

Application Specification
Cylinder Head Height 3.935-3.939" (99.95-100.05 mm)
Maximum Warpage (1) 0.002" (0.05 mm)
Valve Seats
Intake & Exhaust
Seat Angle 45Β°
Seat Width
Intake
Standard 0.031-0.039" (0.80-1.00 mm)
Service Limit 0.060" (1.50 mm)
Exhaust
Standard 0.049-0.061" (1.25-1.55 mm)
Service Limit 0.080" (2.00 mm)
Valve Guides
Intake & Exhaust
Valve Guide I.D.
Standard 0.217-0.218" (5.51-5.53 mm)
Service Limit 0.219" (5.55 mm)
Valve Guide Installed Height 0.620-0.640" (15.75-16.25 mm)
Valve Stem-To-Guide Oil Clearance
Intake
Standard 0.001-0.002" (0.02-0.05 mm)
Service Limit 0.003" (0.08 mm)
Exhaust
Standard 0.002-0.003" (0.05-0.08 mm)
Service Limit 0.004" (0.11 mm)
(1) Maximum resurface limit is 0.008" (0.20 mm).
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.