Restoring the Deep Water Fording Kit

[Ajax MD]

My truck was a Marine truck that was re-engined to a 6.5L in 2002. It was originally equipped with the fording kit.

It seems that during the reset, the kit was removed or bastardized. The most obvious differences are the short intake and exhaust stacks. These should obviously be the tall versions.
I discovered that the fording valve is still installed in the cab. Yesterday, I figured out that I still have the power steering cap vent line.
This morning, I was going over the parts list in the TM and it seems that I still have the fording dip sticks for the oil and transmission fluid levels.

I'm a bit confused on the "sensor cup" and "vent valve", items 12 and 18 in Figure 399. Where are these mounted?
Next, does the vent line on the hydroboost go back to the system of hoses and "T" fittings in Figure 399?
Lastly, does the fording system not pressurize the transmission or transfer case? Or is this done via the power steering system?

Really lastly, is there a way that I can test the system? Should I feel some positive pressure at the P/S cap vent line if I flip the lever in the cab?

If I have enough of the pieces, I will buy or fabricate the missing components and restore the system. If I'm missing too much, I'll just skip it.

 

[Crapgame]

On the block top, right side you have the yellow zinc plated CDR Crankcase Depression Regular Valve, the DWF CDR has an extra horn on the top for the vent line that runs up the side of the intake stack. The DWF CDR is probably the 2nd or 3rd most expensive component of the DWF Kit, behind the DWF Exhaust. If you still have that you may be in good shape, although it does have a valve membrane inside that can go bad, dry out with age/temp. A replacement is about $220. The RH side B Pillar DWF Sensor Cup is about $25-40.




Here's a link to DWF Kit installation instructions and the leak test can be found in 3-14:

Deep Water Fording Kit - Installation

 

[Ajax MD]

On the block top, right side you have the yellow zinc plated CDR Crankcase Depression Regular Valve, the DWF CDR has an extra horn on the top for the vent line that runs up the side of the intake stack. The DWF CDR is probably the 2nd or 3rd most expensive component of the DWF Kit, behind the DWF Exhaust. If you still have that you may be in good shape, although it does have a valve membrane inside that can go bad, dry out with age/temp. A replacement is about $220. The RH side B Pillar DWF Sensor Cup is about $25-40.


View attachment 798401

Here's a link to DWF Kit installation instructions and the leak test can be found in 3-14:

Deep Water Fording Kit - Installation

Awesome, thanks. This part seems familiar to me from past excursions into the engine bay. I'll pop the hood this afternoon or weekend and check for those parts.

Then, I'll need to pull the doghouse off and check to see if the valve/switch in the cab is actually connected to anything. It would be weird (but lucky) if all the parts were intact except for the intake and exhaust stacks.

 

[AAVP7]

Sorry to interfere here, but I´m pretty sure the line from that extra horn on the CDR valve does NOT go up the intake stack. The extra horn is connected to the sensor cup. The air pressure being trapped inside the sensor cup when deep fording acts upon the mebrane inside the CDR, and directs more overpressure to the vent system.

The line going up the intake stack is the vent line for your fuel tank, passing through that little filter behind your coolant reservoir.

Those DWF kit instructions are sometimes not very clear.

 

[stucazz74]

My truck was a Marine truck that was re-engined to a 6.5L in 2002. It was originally equipped with the fording kit.

It seems that during the reset, the kit was removed or bastardized. The most obvious differences are the short intake and exhaust stacks. These should obviously be the tall versions.
I discovered that the fording valve is still installed in the cab. Yesterday, I figured out that I still have the power steering cap vent line.
This morning, I was going over the parts list in the TM and it seems that I still have the fording dip sticks for the oil and transmission fluid levels.

I'm a bit confused on the "sensor cup" and "vent valve", items 12 and 18 in Figure 399. Where are these mounted?
Next, does the vent line on the hydroboost go back to the system of hoses and "T" fittings in Figure 399?
Lastly, does the fording system not pressurize the transmission or transfer case? Or is this done via the power steering system?

Really lastly, is there a way that I can test the system? Should I feel some positive pressure at the P/S cap vent line if I flip the lever in the cab?

If I have enough of the pieces, I will buy or fabricate the missing components and restore the system. If I'm missing too much, I'll just skip it.

Hello, I have a M1151A1 that seems to have many of the Fording Kit parts still present. Can you send me the part list and diagrams that you referred to so I can verify what . where and how some things go? Thanks, Chris

 

[mrfarb]

This should help.

 

[CallMeColt]

I have an M1097R1 that is in the same boat, but had almost all the DWF parts removed. The only hint I had that mine was one at one point, was the hols punched in it for water draining & patched, selector valve hole patched, the hard vent lines to the rear left in place but cut, and the only part of the exhaust that was new was the short tip.

I think I have gotten almost everything for it now. Hope to have it 100% installed by the end of the year. Plan to make a video about it for my YouTube channel showing all the parts installed. There is a lot of little stuff to make it right.

 

[CallMeColt]

I have an M1097R1 that is in the same boat, but had almost all the DWF parts removed. The only hint I had that mine was one at one point, was the hols punched in it for water draining & patched, selector valve hole patched, the hard vent lines to the rear left in place but cut, and the only part of the exhaust that was new was the short tip.

I have learned over the past few months that a M998 and/or M1097R1 with a T400 transmission has differences compared to A2 and newer generation trucks.

Having the dipsticks already done is a big advantage.

I think I have gotten almost everything for it now. Hope to have it 100% installed by the end of the year. Plan to make a video about it for my YouTube channel showing all the parts installed. There is a lot of little stuff to make it right.