Toyota 13053-31031 CAMSHAFT Sub-Assembly

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This procedure requires engine and transaxle removal. Drain engine oil and coolant, then remove timing chains and sprockets. Ensure correct camshaft positioning before removal. Gradually remove bearing cap bolts, then housing bolts. Remove bearing caps and camshafts, and pry off camshaft housing. Remove and inspect rocker arms and lash adjusters. Check cam lobes and bearing journals for damage. Measure camshaft lobe and journal dimensions, replacing any outside specified limits. Check oil clearance for each camshaft journal, replacing if necessary. Lubricate and reinstall lash adjuster bores, rocker arms, camshafts, bearing caps, and housing. Apply RTV silicone sealer to sealing surfaces and tighten bolts. Repeat for front cylinder bank. Reinstall timing chains, cover, and components. Check for resistance by hand-rotating crankshaft. Refill oil and coolant, reconnect battery, start engine, and check for leaks.

After camshaft removal, thoroughly inspect the following components:CamshaftsCamshaft bearingsLiftersOther related componentsMeasurements should be taken to ensure they meet specifications.

The initial steps involve draining the engine oil and coolant, followed by the removal of the timing chains and sprockets.

In the final reassembly, follow these steps:Ensure proper camshaft endplay and alignment.Reassemble components in the reverse order of removal.Verify critical factors before completing the procedure.