Heres how to replace a leaking or clogged VTEC solenoid and gasket on the 2.4L 4 cylinder K24 engine.\r
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Leaking a leaking VTEC gasket or clogged/malfunctioning VTEC uator are a common problem on older Hondas. The VTEC solenoid mounts to the engine head, and allows the flow of oil into small passages that change the camshaft profiles, causing the engine to perform faster.\r
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This is not to be confused with the VTC solenoid, which advances or retards the variable valve timing gear to change engine timing. A video on VTC solenoid replacement can be found here:\r
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If your Honda is leaking oil down the passenger side of the engine, the most probable cause is a leaking VTEC solenoid. Oil will drip from the top, down over the oil filter and the side of the drain pan, and in some cases onto the subframe. Significant oil loss can be observed, along with a P1259 VTEC malfunction code.\r
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This tutorial demonstrates how to replace the VTEC solenoid and gasket. The gasket itself has a strainer that can sometimes get clogged. This procedure will be applicable to the Acura TSX, Honda Accord, Honda CR-V and Element.\r
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Three 10mm bolts secure the VTEC solenoid to the back of the engine, toward the firewall. It can be accessed from both the top or bottom of the engine. Have a catch pan ready to drain access oil once the bolts are removed. The oil pressure switch is also part of the solenoid assembly.\r
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Clean the mating surfaces thoroughly, before reinstalling the gasket dry. Torque the three 10mm bolts to 104 in-lb. Top off the engine oil and start the vehicle. Once the engine is warm, check for leaks.