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Baffles in the pan make this a pretty hard job. If you sure 'nuff don't want
to pull the engine, you will have to drop the front suspension crossmember at
least 6", and since this includes the motor mounts, you will have to suspend
the engine somehow and you will need the car up pretty high to give clearance
for you, the crossmember and the pan.
I would hook up a pressure gauge that you trust to the fitting first and
verify that there is no oil pressure.
Possibilities for loss of oil pressure include an oil pump shaft failure
(IPD sells a little ring that goes around the shaft where the oil pump/distrib
drive shaft fits into it to avoid the shaft splitting), or a blown seal on the
steel tube that goes from the oil pump to the galleries in the block.
By having too strong a spring in my oil pump and thus too much oil pressure
I blew one of these out on my 122 wagon and did this operation, which is about
the same as on an 1800, except you have a lot more stuff hooked up on an 1800ES.
You'll need some sturdy wire to hang the crossmember in the lowered position.
A leaking oil pressure switch/line can also give the indication when there is
still oil pressure, so you need to verify whether or not you do have oil
pressure before you start this rather involved operation.
Sometimes the bolts holding the crossmember are pretty tight and rusty.
You need a very sturdy 3/4" 6-point socket for these and I'd use some
Blaster first, maybe let it soak for a while with occasional jarring with
a hammer and a sturdy drift.
--
George Downs Bartlesville, Heart of the USA!
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