slowroll
Posts: 1254
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Joined: 10/3/2007
Status: offline
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The 4.1,4.5, and 4.9 Engines are very rebuildable. Cylinders or jug are easily removed and replaced, so over boring isn't necessary. Assembly is a little different because cylinder heads need to be installed, before the main bearing clearance can be checked. The block can distort slightly as head bolts tightened / torqued to spec. With the 4.9 there is one thing to keep in mind; 91-93 were built with short skirted piston which tended to be noisey on start up. They did come out with piston with a longer skirt to get rid of the noise, however power and economy sufferred. If you plan do your own rebuild, it is strongly suggested to get factory manual or atleast a reprint of the engine section of the manual for year of you're working on.
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Printable Version
Engine Rebuild - 
