jp928
Well-Known Member
Just took delivery of a 3.9L I intend to overhaul for the P6B. Some aspects have me beat. Its out of a 1994 Discovery. 38D serial, suffix B, 8.13:1 CR markings. Serpentine front cover, crank driven oil pump. Block is 38A as it has the bosses for cross drilled main caps. 10 bolt heads. On these Hammil says the valves should be more recessed than earlier models, but they look like normal height to me. The pistons crowns have 22058 and X47 and M6 stamped on them. Sump is old style 14 bolt, looks same as P6B.
Pretty sure its been opened before, as all the gaskets are steel shim, rather than the composite I expected. None of the pistons have the washed look that would indicate they have seen water, although the No 8 exhaust valve is very white, where all the others look normal. The heads have been shaved, as I can easily see milling marks. New rocker assemblies , said to be ~ 3 months old , are present, with no visible wear on the shafts, but they were the wrong way around - oil holes on the wrong side. Also said to have head new lifters recently, and the 4 I have been able to pull all have very clean shiny bases. Dont believe the cam was changed when the lifters were done.
Comments please. Pics can follow if necessary to nail down anything.
thanks
Pretty sure its been opened before, as all the gaskets are steel shim, rather than the composite I expected. None of the pistons have the washed look that would indicate they have seen water, although the No 8 exhaust valve is very white, where all the others look normal. The heads have been shaved, as I can easily see milling marks. New rocker assemblies , said to be ~ 3 months old , are present, with no visible wear on the shafts, but they were the wrong way around - oil holes on the wrong side. Also said to have head new lifters recently, and the 4 I have been able to pull all have very clean shiny bases. Dont believe the cam was changed when the lifters were done.
Comments please. Pics can follow if necessary to nail down anything.
thanks
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