Hi there.
What engine oil are they using, don't use a synth oil use a mineral oil and for those miles 20w-50, now the main problems that with the new head, this has shown up a weakness in the lower end, a common problem that they should have explained before fitting a new head, you will need a leak down test to determine if this is the case, but I feel there is not a lot to be done except a lower end overhaul.
Mark (mhpautos)
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Monday, November 16th, 2009 AT 3:06 PM