swilde20 Posted October 5, 2011 Share Posted October 5, 2011 I'm going to be replacing head gaskets and putting on a set of heads that have been off the engine for more than a year, and was wondering what things i might want to do to prevent future problems. Also wondering about bleeding valves if it would be needed and how to do it. Thanks Steve Quote Link to comment Share on other sites More sharing options...
davebugs Posted October 5, 2011 Share Posted October 5, 2011 Those valves probably have the shims to adjust - a bit of a PITA. Quote Link to comment Share on other sites More sharing options...
Mike104 Posted October 5, 2011 Share Posted October 5, 2011 Definitely check the valve clearances as Dave mentioned. Depending on the condition of the heads you may want to consider having a leak down test done to determine if the valves need any work before installing the heads. Another thing to consider may be changing the valve stem seals and having the heads checked for flatness/resurfaced to ensure long HG life. You may also want to replace the camshaft seals and all timing components while you are there. There may be some other things I may have missed but hopefully more knowledgeable members will chime in. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 5, 2011 Share Posted October 5, 2011 Is this a 2.2 or a 2.5? GD Quote Link to comment Share on other sites More sharing options...
swilde20 Posted October 5, 2011 Author Share Posted October 5, 2011 sorry 2.5 engine Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 6, 2011 Share Posted October 6, 2011 Definitely check all the valve adjustments. Usually somewhere between 1/4 to 1/2 the valves will need new shims. Have the heads resurfaced if you haven't already. Use only Subaru head gaskets. They redesigned the gasket about 4 times so you want the latest from Subaru. GD Quote Link to comment Share on other sites More sharing options...
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