I think my 3.9 is a 4.0 Please help me id.
Mudding
Joined: Aug 2007
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RE: I think my 3.9 is a 4.0 Please help me id.
Your dealer should be able to tell , record the engine number at the driver side head gasket surface starts with 38D or simular, the newer castings do not have a bottom row of head bolts. no 3.9s had cross bolted mains.
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