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The manifold absolute pressure sensor is installed in the intake manifold it is a simple installation thread in thread out.. but it is in various locations on the manifold depending on which engine you have The chilton or haynes manual will show you.
It takes ½ X 13 thread (¾ head) and the two on top are slightly shorter than the other 4, total of six, two on top, 2 in middle and two more for starter and use grade 8 bolts
standard thread on the 99 model with 4.0 liter.
if its an automatic transmission theres a dipstick on top of the transmission, look above it. It will be to the right of the battery behind some hoses and have a yellow handle.If its a manual (5 speed) there is no disptick.... theres a 17mm bolt (metric thread) that can be removed from the bottom on the transmission. Its on the passenger side.
read the manual. All machines are different.
square
It's a standard thread not reverse threaded. Same with the automatics flex plate bolt and manual transmission's pressure plate bolts.
From the WK parts manual, the lug nut size is .50x20 thread (diameter and pitch) and I believe 3/4" hex. I'm sure about everything except the 3/4".
Maybe left handed thread
Needle and thread, sometimes a thimble
Square
You will probably have to re-thread unless you can get a SLIGHTLY over sized bolt to thread and seal