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Old 01-15-2006
mx98ranger's Avatar
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Replace spark plugs

for Christmas this year i got a set of Bosch Platinums to install into to truck cuz the stock are pretty much gone after 7 years of driving. i know the what im trying to do and ive helped do it on other cars/trucks... but im really not positive about how i should replace spark plugs. 1st question... do i need to unplug the battery before doing anything. 2nd question... i was lookin at my engine bay and took notice the very small amount of room that i have to do this... do you guys have any tricks or other ways of getting to your spark plugs? 3rd question... anything else i need to know before getting started? thanks for any help.

Cory^^

'98 4.0 OHV
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Old 01-15-2006
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I don't have any real answers except try searching, cuz I have a read quite a few threads on this already.... all I really know is that there are one or two towards the way back on the passenger side that are just plain PIT's
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Old 01-15-2006
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It's better to use a long 5/8" socket rather than a big thick rubber interiored sparkplug socket as it won't reach in to get to the plug.

Just take a slow common sense approach to it. The two rear ones on both sides of the truck can be reached through the flap in your fender well if needed. Use antiseize compound on them to make the next change easier.
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Old 01-15-2006
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if you go through the top, just be careful of that oil dipstick, i broke my handle off on my OHV. sometimes the best way is through the fender well. as a side note im not a big fan of the bosch platinums in our engines, i always use motorcraft
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Old 01-15-2006
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motorcraft=autolite >>>> bosch platinums in a ranger..
on another note they have to be DOUBLE platinum or
one bank will erode very fast as they fire backwards...

The factory plugs are actually platinum on different sides for different
banks of the engine for this reason.

Rand
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Old 01-16-2006
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ok heres a trick i learned on my buddys ranger jack up the front passenger side
remove the tire
remove the mud guard
bam there are your plugs
also it helps to have a universal joint on your socket
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  #7  
Old 01-16-2006
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got em in guys. thx for all the help. truck runs a lot smoother now.
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