Question 1

How to disassemble and inspect cylinder heads on Lexus ES300?

Accepted Answer

Cylinder heads, new or rebuilt, are readily available at dealerships and auto parts stores. Specialized tools and parts needed for disassembly and inspection may make it more cost-effective for home mechanics to buy replacements. Cylinder head disassembly involves removing intake and exhaust valves and related components, assuming lifters or rocker arms and camshaft(s) are already removed. Before removing valves, label and store them for reinstallation in the same valve guides. Use a spring compressor to remove the springs on the first valve and its components. If a valve binds, deburr the area around the keeper groove. Repeat for all valves, keeping parts together for reinstallation. After removal, clean and inspect the head. If overhauling the entire engine, complete engine disassembly before cleaning and inspecting the cylinder head.

Question 2

How to install a cylinder head on Four cylinder engine on Lexus ES350?

Accepted Answer

For 2010 or later models, you can remove the engine and transaxle assembly. Begin by relieving fuel system pressure, disconnecting the battery, draining the coolant, and removing the drivebelt, alternator, valve cover, throttle body, fuel injectors, fuel rail, intake and exhaust manifold, timing chain, and camshaft sprockets. For newer models, also remove camshafts, lifters, and camshaft housing. Remove the variable valve timing controversy, coolant hoses, and electrical connections from the cylinder head. Loosen the cylinder head bolts in 1/4-turn increments and lift the cylinder head off. Install the removed components, position the new gasket, and apply RTV sealant. Tighten the bolts in the recommended sequence. Installation is the reverse of removal.

Question 3

How to remove and install the Cylinder Head in 3.5L V6 engine on Lexus RX350?

Accepted Answer

New cylinder head bolts should be used when installing the cylinder head. This procedure applies to either cylinder head, and the manufacturer recommends removing the engine and transaxle assembly to perform it. Begin by removing the camshafts and camshaft housings, followed by the exhaust manifolds. If removing the left cylinder head, gradually loosen and remove the two front bolts. Remove the cylinder head bolts gradually and evenly, in the order opposite that of the tightening sequence, then take off the cylinder head from the engine block. Discard the old cylinder head gasket. Ensure the mating surfaces of the cylinder heads and block are perfectly clean before installation. Use a gasket scraper to eliminate all traces of carbon and old gasket material, then clean the surfaces with brake system cleaner. Stuff the cylinders with clean shop rags to keep out debris while working on the block, and use a vacuum cleaner to remove any material that falls into the cylinders. Check the block and head mating surfaces for nicks, deep scratches, and other damage; slight damage can be removed with a file, while excessive damage may require machining. Use a tap of the correct size to chase the threads in the cylinder head bolt holes, then clean them with compressed air to ensure nothing remains in the holes. Position the cylinder head gasket on the engine block with the lot number stamp facing up, then carefully place the cylinder head on the gasket. Apply a light coat of oil to the new cylinder head bolts, install and tighten them gradually and evenly, in the proper sequence, to the initial torque. After tightening all eight bolts to the initial torque, mark the front edge of each bolt, then retighten each bolt in the same sequence another 90 degrees, repeating this process one more time for a total of 180 degrees from the initial torque. If installing the left cylinder head, install the two front head bolts and tighten them in the correct sequence to the torque. If both cylinder heads were removed, install the other cylinder head now. Proceed to install the intake and exhaust camshafts, followed by the camshaft timing oil control valve, oil control valve filter, and VVT-i sensor. Install the timing chains, timing chain cover, and all components attached to the cover. The remainder of the installation is the reverse of removal. Finally, install the engine/transaxle assembly, refill the engine with oil and coolant, reconnect the cable to the negative battery terminal, start the engine, and check for leaks.

Genuine Lexus Cylinder Head

183 Cylinder Heads found

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Left Hand

Lexus Cylinder Head Sub-Assembly

Lexus Head Sub-Assembly, CYLIN

Lexus Cylinder Head Left Hand

Lexus Cylinder Head Left Hand

Lexus Cylinder Head Sub-Assembly

Lexus Head Sub-Assembly, Cylinder

Lexus Head Sub-Assembly, CYLIN

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Left Hand

Lexus Cylinder Head Left Hand

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Sub-Assembly

Lexus Cylinder Head Sub-Assembly

Lexus Head Sub-Assembly, CYLIN

Lexus Head Sub-Assembly, CYLIN

About Lexus Cylinder Head

Lexus Cylinder Head Parts Questions & Experts Answers

Related Lexus Parts

Browse by Model