: Perform on a warm engine with the throttle fully open; measure pressure by cranking the engine after removing spark plugs [11]. Fuel System Safety
Loosen the cylinder head bolts in a circular pattern, starting from the outside and working inward to prevent head warping.
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Use a precision straightedge and a feeler gauge across the bottom mating surface of the cylinder head. The maximum allowable warpage is 0.05 mm (0.002 inches) . If exceeded, the head must be resurfaced by a machine shop. Valve Clearance (Engine Cold): Intake Valves: 0.15 mm to 0.25 mm (0.006 in to 0.010 in) Exhaust Valves: 0.20 mm to 0.30 mm (0.008 in to 0.012 in)
Locate the gray inside the engine bay near the firewall or under the dashboard. : Perform on a warm engine with the
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Carefully lift the cylinder head assembly off the engine block. Do not pry between the mating surfaces with a screwdriver, as this will gouge the aluminum face. Valvetrain Inspections and Tolerances Here is where to search effectively: Use a
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: High-quality workshop manual covering engine overhaul and electrical systems [13]. Haynes Toyota Corolla Workshop Manual
Loosen the tensioner bolt, push the tensioner pulley away from the belt, and temporarily tighten the bolt. Slide the timing belt off.
If you encounter overheating or white smoke from the exhaust, the manual details the process for removing the cylinder head, checking for warpage, and replacing the head gasket. 4. Torque Specifications