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Just another DuraMax swap
Author: hal (Show all albums)

Converting 669 to an oil burner.
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It should be easy access for air cleaner service.

I plan on building some ducting to get cleaner/cooler air to the intake of the air cleaner.

Using all stock pieces there is about 3/4" clearance to the firewall.

After more time than I care to admit thinking this out, I decided to use the stock Duramax air cleaner. These things need an awful lot of air, in the neighborhood of 800 CFM. The Donaldson that came with 669 only flowed about 350. The stock Duramax filter flows 792 CFM.


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As I had to cut the bottom off I figured I'd add a bit to the capacity. Adding about 4.5" should increase volume to about 72 gallons. Readjusting the fuel sender it looks like about the first 20% will show full before dropping. Not enough room for the float to swing the full height with the added depth.

The tank was coated inside which required cutting the bottom off to access all the coating. Quite an unexpected chore.

Tank painted and ready for the modified pickup/sender.

Here is the exhaust pipe installed. A bit hard to see from this angle.


I'm using the stock 3.5" muffler to try and keep it as quiet as possible. Used stock to the truck exhaust hangers and will exit exhaust in a new location.

(1 Comments)
Another look at the rod on the HB.

Here is a good look at the rod ends that have to change.

Here is the rear HB without the adjustable spool valve.
Show Newest Photos First | Show Oldest Photos First223 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19]

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