labwork Intake & Exhaust Valves for GM 2.0–2.4L ECOTEC — Direct-Fit OE Dimensions

These labwork intake and exhaust valves are direct-fit replacement components engineered for GM 2.0, 2.2 and 2.4L ECOTEC engines, matching OE dimensions for reliable valve seating and operation.

When an engine valve is bent, burned or worn, restoring proper valve geometry and sealing is essential to recover compression and performance. This labwork kit supplies intake and air-out (exhaust) valves manufactured to the specified diameters and lengths used in many GM Ecotec four-cylinder heads. Before ordering, verify the listed part numbers against your existing valves or vehicle VIN to ensure compatibility with your cylinder head and camshaft setup.

Which engines and part numbers do these valves fit?

These valves are produced to match the GM ECOTEC family of 2.0L, 2.2L and 2.4L four-cylinder engines. They correspond to the specific replacement part numbers noted by labwork and are intended as like-for-like replacements for OE valves.

• Intake valve replacement part number: 12622329
• Air-out (exhaust) valve replacement part number: 12615936
• Designed for GM 2.0L, 2.2L and 2.4L ECOTEC cylinder heads

What are the exact dimensions and why do they matter?

Correct valve dimensions determine how the valve seats, clears the piston, and interacts with valve guides and springs. Installing valves with precise head diameter, stem diameter and overall length preserves valve-to-seat contact, avoids piston interference and maintains intended valve train geometry.

• Intake valve: head 35.1 mm, stem 6.0 mm, overall length 102.2 mm
• Air-out (exhaust) valve: head 30.1 mm, stem 6.0 mm, overall length 100.9 mm
• Stem diameter consistency (6 mm) ensures fit in standard guides for these ECOTEC heads

How should I confirm compatibility before purchasing?

Always compare the replacement part numbers and the physical dimensions of your current valves with the labwork specifications. Confirming fit prevents unnecessary returns, safeguards against interference, and ensures the valves seat properly after machine work or valve grinding.

• Match your old valve part numbers to 12622329 (intake) and 12615936 (air-out)
• Measure head diameter, stem diameter and length if possible
• Check your vehicle VIN, head casting number, or service manual for ECOTEC variant details

What should a technician consider during installation?

Professional inspection and machining can be necessary when replacing valves. Proper valve guide clearances, seat condition, spring pressure and valve lash (or hydraulic lifter condition) must be checked to ensure long-term durability and performance.

• Inspect and, if needed, reface or replace valve seats before installation
• Verify valve guide wear and measure clearance to avoid stem wobble
• Check spring height and tension; replace springs and keepers if worn

Who is this for: This labwork valve set is intended for mechanics, engine rebuilders and DIY enthusiasts working on GM 2.0L, 2.2L or 2.4L ECOTEC engines who need exact-dimension intake and exhaust valves. It's suited for engine repairs after valve damage, routine head overhauls, or performance rebuilds where OE-style geometry and fitment are required. If you are unsure about fitment, measure your current valves or consult your service manual before buying.