Dear Sir, I own a new brand isuzu NPR truck (3.6L) but has a problem with engine head. That is, two bolts can not hold engine head probably because of minor crack and engine oil splits out when the vehicle is running. Thus I request for a replacement. Before that, please could kindly give a quote for a new engine head (complete set) and also a new engine (whole set). I will work around total cost involved after having seen it.Thanks and I wait for your reply,Thanks.