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OIL PUMP IN THE OIL PAN.YOU HAVE TO REMOVE OIL PAN TO REPLACE OIL PUMP.IF YOU HAVE 4.6L ENGINE YOU HAVE TO REMOVE FRONT TIMING CHAIN COVER AND TIMING CHAIN.REMOVE OIL PAN.REMOVE THREE BOLTS AND THE OIL PUMP SCREEN COVER TUBE AND REMOVE OIL PUMP.YOU NEED TO SUBMERGE NEW OIL PUMP IN CLEAN ENGINE OIL TO PRIME IT.
Hello if your sport trac has a 4.0 v6 it has two timing chains. One on front drivers side head and one rear passenger side. The timing chain on the rear is costly to repair, which is usually the one to go out.
The rear timing chain (or "cassette" as it's called in Ford lingo) is the chain that drives bank #1 (passenger side) cam. The front timing chain drives bank #2 (driver side) cam. There is a also a primary "jackshaft" chain that is driven by the crankshaft in order to enable both banks to be driven through a common shaft. The reason for this peculiar layout is because this engine is a "derivative" of the 4.0L OHV V6 engine it replaces. Ford simply installed a dummy shaft in place of where the camshaft used to reside on the original OHV engines. But above all else, the job you describe SHOULD NOT be carried out by anyone unfamiliar with this particular engine. There are NO timing marks on any of the drive sprockets, nor are they key to their corresponding shafts. To time this particular engine requires use of FIVE dedicated Ford/Rotunda tools that hold all relevant parts in proper position. Failing to carry this procedure out correctly, will result in the bending of ALL valves with 100% certainty!!! Therefore, it is best left to a Ford dealer technician to carry out. If you would like more information regarding diagrams, TSBs, and procedures with detailed illustrations, please e-mail me directly with your FULL Yahoo e-mail address so I can attach PDF files. Hope this helps.
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