Accessory Drive
System
Engine Coolant
Pump
or
Water Pump
Above: The Modular family has several different Water Pumps to choose from,
for the 03-04 Cobra Engine we need the Short Snout Water Pump. There is also a older and newer version
of these pumps, we won't the newer version. The newer version has the Pump fins enclosed, which
makes for a more effecient Water Pump.
The Engine Coolant
Pump is located in the front of the Engine, centered. It is driven by the Accessory
Belt Drive and is very important to the Engine's Well being. The 03-04 Cobra Engine makes huge power
and that requires a lot of Heat in the Combustion Camber. It's the Water Pumps responsibility to
Circulate the Engine Cooant which transfeers the heat from the combustion process to the Engine Coolant
so it can be transported to the Radiator, where the cooler air blows through the radiators core to carry away the excess heat.
This transaction happens over and over again while the Engine is running. And none of it would work if the Water
Pump didn't do it's job.
There are several different Water Pumps
in the Modular Family, you have a long and short Pump and old and newer designs. The one we want for our Cobra S/C Engine
is the short new design Pump. This new design, where the water Pumps fins are enclosed, does a much
better job of moving the Engine Coolant, then the open fin design. Always start a new Engine with a New Water
Pump, they are relatively cheap, and it makes no sense to use a used Pump. I have installed
both Ford and AC Delco Pumps with great results. There is also a O-Ring that seals the Pump to the
Engine Block, this is usually encluded with a new Pump, so make sure you get one.
Water Pump
2R3V-8501
Water Pump Bolts (4 Req'd)
2R3V-N808102
Water Pump Pulley
2R3V-8A528
WP Pulley Bolts (4 Req'd) 2R3V-N806282
AC Compressor
Above: The AC Compressors are
as much a part of the Cobra engine as anything else. The Drive Pulley is 6mm and there is no reason to re-use a old
used Compressor on your new Engine.
The
AC Compressor is located on the passengers side down low. It is held in place by three long bolts,
and the pulley comes with the Compressor. I like to always use a new AC Compressor,
like the Water Pump on a new engine, it just keeps thing on a even scale, and completes the Engine.
The 03-04 AC Compressor uses a special manifold adapter, this adapter bolts to the back of the Compressor
and allows the AC hoses to attach. These don't come with the new Compressors, so make sure you find one used or
new, cause you have to have it. Also, most new compressors NO NOT come with OIL
in the Compressor, so make sure you add the correct amount and type befor you use it.
AC Compressor
2R3V-19D269
Compressor Bolts (3 Req'd) 2R3V-N806184
Front Engine Cover
or
Timming Cover
Above: There is no way around this very, very important
part of the Cobra Engine. It is impossible to run the Eaton Supercharger without this piece.
Ford still sells them and I vote to just purchase it new and be done
with it. The Used ones that do show-up are old and in need of repair, and will end up costing you more then the new
one. Also don't forget to get the Bolts and Studs that go with the Front Cover.
While all Modular Front Covers
are demensionally the same, it's the lay-out on the front of the cover that is different. The 03-04 Cobra Timming
Cover is a uniqe one and is the only Timming Cover that will work with the Supercharged
Engine. These Covers are very hard to find used, and bring a pretty penny when they are for
sale on web sites like E-Bay. Generally there isn't to much to worry about, but I would stay away from cars that
were involved in front end collissions or other simular accidents. I have seen other Aluminum Timming Covers
wear in the front seal area, they developed small cracks all around the circumforance of the seal. These Front
Engine Covers are still available form Ford, I have bought
several and they generally list for around $700.00. When purchased new, the Front Cover
comes with a new Belt Tensioner, all three pieces of the Front Cover Gasket and a new
Idler Pulley, three items that are never there on a used one, so watch out and don't end up paying
to much for a used Front Engine Cover.
There are several bolts and studs that
hold the Front Cover in place, but also are made to secure other item that mount in front of the Engine Cover.
These are very specific in both length and design, and have to be purchased from Ford.
Engine Front Cover
2R3Z-6019-BF
Bolts (8 Req'd)
2R3V-N806177
Studs (5 Req'd)
2R3V-N806300
Front Cover Bolt
Diagram
| Item | Part
Number | Description |
|---|
| 1 | N806177 | Bolt, Hex Flange Head
Pilot, M8 x 1.25 x 53 |
| 2 | N806177 | Bolt, Hex Flange Head Pilot, M8 x 1.25 x
53 |
| 3 | N806177 | Bolt, Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 4
| N806177 | Bolt, Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 5 | N806177 | Bolt,
Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 6 | N806300 | Stud, Hex Shldr Pilot, M8
x 1.25 x 1.25 x 91.1 |
| 7 | N806300 | Stud, Hex Shldr Pilot, M8 x 1.25 x 1.25 x
91.1 |
| 8 | N806177 | Bolt, Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 9 | N806177 | Bolt, Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 10
| N806177 | Bolt, Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 11 | N806177 | Bolt,
Hex Flange Head Pilot, M8 x 1.25 x 53 |
| 12 | W706560 | Stud, Hex Head Pilot, M8
x 1.25 x 65 — M8 x 1.25 x 16 |
| 13 | N806300 | Stud, Hex Shldr Pilot, M8 x
1.25 x 1.25 x 91.1 |
| 14 | N806300 | Stud, Hex Shldr Pilot, M8 x 1.25 x 1.25 x 91.1
|
| 15 | N806300 | Stud, Hex Shldr Pilot, M8 x 1.25 x 1.25 x 91.1 |
Idler Pulley Support
Above: This is the Idle Pulley Support, It comes like you see it, with the Belt Tensioner,
idler Pulleys attached. This is a very hard piece to find, but be very carefull that if you do find one, you don't
over pay as many on E-Bay have.
The Idler Pulley Support Assembly
is a large and very nesseccary piece for the 03-04 Cobra Engine. It is the only modular Engine that uses this important
piece, and that makes them scarce and expensive. But be carefull not to confusse the issue, Ford
still sells these pieces, and they often sell for more used then you can purchase a new part with
all the additional pieces. This is simply a case where the purchaser does not know his subject or the current prices
very well, and gets taken because of it. I always purchase this part new, and in my opinion you would be fullish not
to.
Belt Tensioner
Above: Both Drive Sytems, Accessory Drive
System and Supercharger Drive System, use the same Belt
Tensioner. Purchase the Front Cover and Idler Support Bracket new and you
don't need to worry about this Item.
If you used my advise you already have
this item, it came with the new Front Engine Cover, but if not you will need a new one. Don't even
think about going used with this one, it serves a very important role in keeping the Accessory
Belt tight. These are very popular on E-Bay and generally sell for around $50.00. The Engine
requires two of them, and they are both the same part number,
Belt Tensioner
2R3Z-
Idler Pulley
Above: If you need any of the three Idler Pulleys the Drive System requires,
why not think about buying one or more of these good looking beautys? For only slightly more then the plain Stock
Pulley sells for you could add some pizase and better performance to your 03-04 Cobra Engine.
There are three Idler Pulleys on the Accessory Drive System.
They are all the same part number and are all made from stamped steel and have one, centrally located bearing, supporting
them. I would like to see you use all new Pulleys, but if you have to purchase them, I would go with
an aftermarket brand and not the factory Pulley. The Aftermarket has several vendors that sell very
nice Aluminum Billet Idler Pulleys. These are supported by Double-Sealed Ball Bearings and are much
stronger then factory pieces. They are also available in different diameters and styles, which realy dress-up the front
of the Engine. While E-Bay sells the stock Factory Pulleys for $34.00, you could have a much stronger
and better looking Pulley for just $10.00 more.
Idler Pulley
2R3Z-19A216
Drive
Belt
The Accessory Drive
System uses one Drive Belt, part number 8620. This Belt is the same
as the Supercharger Drive Belt and should be bought new. New Belts are not expensive
nor hard to get. I have used both Goodyear and Ford belts with success, and would think that as long as you stay with
a known brand name, you would do fine.
Drive Belt
2R3Z-8620
Crankshaft Pulley
The Crankshaft Pulley is the
heart of the Accessory Drive System. This one piece supplies the power
to turn all the other parts in the Accessory Drive System. This part is
often refeered to as the Balancer or Harmonic Balancer, but Ford never
calls it that, only the Crankshaft Pulley, so I'll call it that also. This is a very hard part
to find used, and the few I have seen went for what a new Pulley would go for or more! I would say
to just purchase this part from the Ford dealer, yes it's expensive,
but at least you know what you have. You will also need the center bolt and washer, these I would get from a very well
respected manufacturer, ARP. They make quality fasteners for some of the industries most discriminating users.
I use them in as many places as I can, youu can never have to much of a Quality Product.
Crankshaft
Pulley
2R3Z-6312-BAA
Washer
2R3Z-N806165
Bolt
2R3Z-W701512
