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How to Fix the Head Gaskets on a Subaru 2 5

Fixing the head gaskets on a Subaru 2.5 liter engine is a challenging task. It should only be undertaken if you have considerable experience working on cars and have a full set of automotive tools, both standard and metric. You should always wear safety glasses and gloves for protection. Keep a fire extinguisher in the work area for emergencies, and read through the entire procedure before starting work.

Instructions

1

Relieve the pressure in the fuel system as follows: Remove the fuel filler cap; Disconnect the fuel pump relay; Run the engine until it stops. Be sure to reinstall the relay when you have completed the repairs. Disconnect the negative cable from the battery. Be sure to disengage the security system before disconnecting the battery.

2

Drain the engine coolant into a container and save it for re-use or recycling. Remove the spark plugs, timing belt covers, the timing belt, camshaft sprockets and camshafts. Follow the procedures to mark the components in order to re-install the camshafts properly.

3

Remove the intake and exhaust manifolds (use the penetrating oil to loosen the bolts if necessary) and any other brackets, hoses or components blocking access to the heads.

4

Loosen the head bolts in the reverse order they are installed: Start with the outside bolts in an "X" pattern and loosen the center bolts last. The erence below will indicate the exact sequence. Remove the heads and place a clean towel in each cylinder to prevent contamination.

5

Clean the gasket mating surfaces caully and thoroughly. Install the new gaskets on the head locating lugs and install the heads with the bolts finger tight. Use the torque wrench and angle indicators in the tightening sequence and procedures to complete the installation process. Assemble the other parts in reverse of the order they were removed.