abeauch Posted May 7, 2009 Share Posted May 7, 2009 I am doing a head gasket job on an 98 outback 2.5l, I am concerned about the grooves left by the old gaskets on the cylinder head surface. They are also on the block Is it necessary to get them ground by a machine shop? I checked for warpage with a .002 feeler gauge and straight edge and they do not appear to be warped. Thanks Link to comment Share on other sites More sharing options...
erik litchy Posted May 7, 2009 Share Posted May 7, 2009 i would, as a rule resurface any head that has a bad headgasket, not for flatness but for surface roughness. irregularities are the enemy. i think what would be needed is a Surf guage Link to comment Share on other sites More sharing options...
abeauch Posted May 7, 2009 Author Share Posted May 7, 2009 What about the block? I have the same grooves on the mating surfaces on the block? Link to comment Share on other sites More sharing options...
porcupine73 Posted May 7, 2009 Share Posted May 7, 2009 Not sure if this helps but : http://www.scoobymods.com/forums/showthread.php?t=7229 Link to comment Share on other sites More sharing options...
msmithmmx Posted May 7, 2009 Share Posted May 7, 2009 That is normal, you need to sand them out. Take a nice size peice of plexi-glass (lowes). 6 inches wide by 10 inches long and wrap it in 600 grit sand-paper, the black sand paper. Soak the paper down with WD-40 and start evenly sanding the block. Do not spend a lot of time in one section. It will take some time but you can get all of that old gasket out. If you see some wd-40 dripping down the cylinder wall just gently wipe it out. Link to comment Share on other sites More sharing options...
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