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The Dieselfication of Coach 1046

Author: BigRabbitMan (Show all albums) This album is dedicated to following the process of Coach #1046 being converted from a 1976 Chrysler 440-I with a 4spd Allison AT540 transmission to a 2006 GMC Duramax LBZ turbo diesel with a 6spd Allison 1000 double overdrive transmission. There is a companion discussion thread in the Mechanic's Corner section of the Forum area of this site.

Show Newest Photos First | Show Oldest Photos First 379 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32]
(1 Comments) Yes!! Coolant has now been installed.	This casting that joins the two hoses has two bungs brazed into it to support other functions. The temperature sensor will be used to control the speed of the engine fan. As you saw earlier, the fan uses a variable speed clutch. This is where the temperature is measured for input to the module that will be controlling fan speed. The small hose pointing down will be the source for coolant for the coach heaters.	Here is another angle to look at the upper hose. It has been wrapped with belting as a precaution just in case it should contact the radiator housing.	Back up topside, the upper radiator hose is now in place. Again, a trimmed off the shelf hose with the right bend was used to connect the radiator to the trimmed stock Duramax hose.
This gives a little better view of the line coming back from the EGR cooler. A good flow through this line is important as the sensor for engine temperature is right where the coolant enters this system. Without good flow here, the ECM could receive incorrect temp readings and that would affect engine operation.	(1 Comments) Another view where you can see the connection to the radiator and the second small line for the return from the EGR valve. The coolant hose turns up and then connects to the mechanically driven water pump that sits low and to the right side of the engine.	With the change from the GM radiator to the Ford radiator, the lower radiator hosing presented a challenge. It was resolved by cutting up the stock GM preformed hose and using two sections of it with a section of preformed hose secured off of the wall at Napa. The right hand section of blue hose has a molded in small hose that will become the return from the coach heater. The middle section has (on the back side) a molded in return line for the water cooled EGR valve from the engine. The black section to the left makes the bends and connection to the radiator outlet.	This picture shows the final position of the coolant pressure tank (you can see the bottom of it) and its connection to the bottom of the radiator. Also the the exhaust pipe is completed and the transmission coolers have been plumbed. The hoses were routed to minimize the clearance needed between them and the cowling.
The small bolt shown here is there to prevent the radiator assembly from lifting off of the support brackets should a major bump occur. There is one on each side.	Here is where the wires that control the fan speed come out of the shroud.	The radiator is now installed permanently. The two dark squares are dual transmission coolers. I wanted to use thin coolers due to space so to get the needed cubic inches of cooling capacity I have used two coolers. They will be plumbed in parallel with half of the flow going to each cooler.	On the top I used a large piece which will also dampen any sounds that the shroud may make or amplify.
Show Newest Photos First | Show Oldest Photos First 379 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32]

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