V8 90 JON Posted July 7, 2010 Share Posted July 7, 2010 my v8 (4.6 block and heads 3.9 front cover & megasquirt) has suddenly started using lots of oil. it's not a road car mostly used for challenge events and pay and play. so....there is little or no crank case pressure (checked at the oil filler) but the plugs are oily and it smokes,bluey grey smoke so is it rings or valve guide oil seals? and if its the later can they be changed without removing the heads?...compressed air into the plug hole to keep the valves shut whilst changing the seal? thanks in advance .... Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted July 7, 2010 Share Posted July 7, 2010 [select of possibilities Wrong Oil / Too thin Too much oil / water contaninated oil Valve stem seals Piston rings (do a Comp Check) Bore wear Don't rule out the above Nige Quote Link to comment Share on other sites More sharing options...
V8 90 JON Posted July 16, 2010 Author Share Posted July 16, 2010 Problem found (i hope) ring gap in bore 6mm!!!!! not the recommended 6thou all going back together with new rings and shells so fingers crossed Quote Link to comment Share on other sites More sharing options...
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