Yes, most probably the valve seals are bad.
The normal way to replace the seals are to rremove the cylinder head and perform valve lapping and replacement of the seals.
Alternatively you can remove the rocker arms and with plugs removed, apply regulated compressed air into the cylinder to enable the valve springs to be removed without the valves dropping into the cylinders. Valve seals can be removed and replaced.
The valve cover seals can be replaced at the same time.
Wednesday, April 21st, 2010 AT 10:08 AM