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.
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HOMESERVICE MANUALSTOYOTA2000TACOMA BASE, 2D PICKUP, 2.4 L, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ON-VEHICLE ADJUSTMENTS - 4-CYLINDERENGINE MECHANICALVALVE CLEARANCEECHO
2000 Toyota Tacoma Base, 2D Pickup, 2.4 L, Standard
Valve Clearance: Echo
2000 Toyota Tacoma Base, 2D Pickup, 2.4 L, StandardSECTION Echo
- Remove No. 2 cylinder head cover located on top of engine, above ignition coils and valve cover. Disconnect electrical connectors at ignition coils mounted on top of valve cover. Remove bolts and ignition coils from valve cover. Disconnect PCV hoses from valve cover.
- Remove valve cover bolts/nuts, seal washers, valve cover and gasket. Rotate crankshaft clockwise (viewed from timing chain end of engine) until crankshaft pulley timing mark (groove) aligns with "0" mark on timing chain cover and cylinder No. 1 is at TDC on compression stroke. Cylinder No. 1 is front cylinder at timing chain end of engine.
- Ensure timing marks on camshaft sprockets are facing upward at 12 o'clock position. See Fig 1. If timing marks are not as specified, rotate crankshaft clockwise one full revolution (360 degrees) and realign crankshaft pulley timing mark (groove) with "0" mark on timing chain cover and then recheck reference mark alignment.
- With cylinder No. 1 at TDC on compression stroke, use feeler gauge to measure valve clearance between valve lifter and camshaft on specified valves. Perform STEP 1 in illustration. See Fig 2. Record valve clearance.
- To check remaining valves, rotate crankshaft clockwise one full revolution (360 degrees) and realign crankshaft pulley timing mark (groove) with "0" mark on timing chain cover. Using feeler gauge, measure valve clearance between valve lifter and camshaft on specified valves. Perform STEP 2 in illustration. See Fig 2. Record valve clearance.
- Ensure valve clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS (ECHO) table.VALVE CLEARANCE SPECIFICATIONS (ECHO)
Application (1) In. (mm) Intake .006-.010 (.15-.25) Exhaust .010-.014 (.25-.35) (1) Adjust valve clearance with engine cold. - If valve clearance requires adjustment, camshafts must be removed for access to valve lifters. Different thickness valve lifters are used. Ensure camshafts are positioned so timing marks on camshaft sprockets are facing upward at 12 o'clock position. See Fig 1.
- Place reference marks on timing chain at both camshaft sprockets. See Fig 3. Remove timing chain cover plug from front of timing chain cover. See Fig 3.NOTE: When attempting to rotate stopper plate downward, if stopper plate cannot be easily rotated downward, it may be necessary to slightly rotate exhaust camshaft back and forth to aid in movement of stopper plate.
- Using screwdriver, rotate stopper plate on timing chain tensioner downward while rotating exhaust camshaft slightly clockwise and pushing plunger on timing chain tensioner inward. See Fig 3. Once plunger on timing chain tensioner is pushed inward, while holding stopper plate downward, insert a .08-.12" (2.0-3.0 mm) pin through stopper plate and into hole on timing chain tensioner to retain the plunger in retracted position. See Fig 3.
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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.