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If
you have ever wheeled far away from civilization and are
looking for a very handy mod, On Board Air is it!
You Can
- Run
Air Tools (almost constantly) to fix trail breaks
- Fill
Tires (Fast)
- Clean
Dirty Parts
- Fill
inflatable toys and or mattresses
It
is a very hand thing to have on your jeep and the usefulness
if amazing.
After
months of searching online i found out that no one has ever
put a York A/C compressor onto one of the older 2.5L Wrangler
motors. I was surprised and excited about this because i
knew i was going to be the guinea pig and a lot of trail
and error was needed.
I
will not bore you with all my trial and error details but
here is what you need to get a York A/C Compressor onto
a Pre-90 2.5L YJ motor:
Required
Parts:
-
York A/C Compressor
- A/C
Bracket for York to Block for 4.2L 6Cyl
- Alternator
Relocation Bracket for 4.2L 6Cyl
- Compressor
Idler Bracket for 4.2L 6Cyl
- Idler
Adjuster Bracket for 4.2L 6Cyl
- Idler
Pulley for 4.2L 6Cyl
- Custom
Bracket For The Idler Adjuster Bracket (pics and measurements
of mine coming soon) NOTE: This is only need for an OLDER
(pre 90) 2.5L
- Air
Pressure Gauge From Grainger or Similar. I ordered THIS
ONE because i like the flush look
- Air
Manifold from www.rockstomper.com (tell him i sent you
please)
- Misc
Plumbing (personal preference)
To make a long story short, the passenger side of the 2.5L
block is 100% identical to the older 4.2L motors and the
3 holes on the side of the 4.2L block that the compressor
bracket attaches too are also in the exact same spot on
the 2.5L. This means the 4.2L bracketry that i had for my
CJ all converted over to the passenger side of the motor
and the York and Alternator mounted effortlessly.
The
only problem i ran into was mounting the idler pulley bracket
to the drivers side of the block. As you can see in the
pic below, the bracket needs to be moved over exactly 2"
away from the block in order to clear the thermostat housing.
I will have better pics and measurements of the custom bracket
soon. I did all the measurements and such and sent them
to Bud Rosenburger of BUD BUILT in Arcade NY to have the
bracket made. I then had to move the front drivers side
head bolt to the middle and use the middle head bolt in
the front because it had a stud on the top and i need that
to mount the bracket.
Still have tons of room with the York installed.
Here
you can see the alternator relocated underneath the York.
This is done via the 4.2L alternator relocator bracket.
Here is the idler pulley and the custom bracket
from BUDBUILT to make it fit.
Here
are some pics of the tank and the plumbing of the York
I decided to use the 2.5 Gallon tank from Brad
Kilby because of the size, amount of fittings and ease
of mounting It has a total of 5 3/8" NPT fittings
for ease of installation at almost any angle It also,
has cool brackets to mount it
Then
Came the plumbing and wiring. Here are 2 schematics that
i made for my specific setup using some pics from Glenn
Bontlys Great Schematics. Check em out:
 
Here are some shots of the manifold and plumbing
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