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In order to change the spark plugs on a 2005 Chrysler Pacifica w/3.8L engine the upper intake manifold will need to be removed in order to access the 3 front spark plugs. The 3 rear plugs however are very easily accessable. once the upper intake manifold has been removed (approx. 12-15 bolts) the coil packs will need to be unscrewed and removed in order to gain access to the spark plug. Seeing as how the throttle body must be removed, now is a good time to spray it all down with throttle body cleaner and clean out the IAC (idle air control) won't hurt either. A new set of upper intake gaskets will be needed in order to re-assemble the upper intake manifold in order to prevent any vacuum leaks. Make sure to torque all plugs and bolts to factory specs to prevent leaks or even possibly breaking bolts on reassembly. As extra precaution, once the manifold has been removed, I stuffed some workshop towels into the intake manifold on the block just in case I get clumbsy and drop a bolts or even some debris down there.

Job is fairly simple but time consuming. remember don't rush it and work clean and thoroughly and in case you think that you might forget how to re assemble evrything, take out the digi cam and snap some pics along the way as a refference point.

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Q: How do you change the spark plugs on a 2005 Chrysler Pacifica?
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