DSU Diesel Club

After a group effort, and some creative thinking. The transmission cooler flusher is complete. This in-house made tool will be beneficial in flushing any contaminants from a cooler in the event of a transmission failure. Allowing the use of the existing cooler, saving the customer the cost of a replacement.
This unit features a heating element, and digital temperature adjustment.

Boosted Diesel go-cart in the making.

Todays Project~
Vehicle: 1984 Ford F-250
Engine: 6.9 IDI
Mileage: 😂
Concern: Excessive smoke and hard starting.

A mechanical compression test was performed on the engine by tapping into the glow plugs and cranked at a consistent 5 seconds. This test concluded uneven compression and a concerning loss of compression on cylinder 7.
After the test, the engine was started. Upon starting, and idling for a second or two, cylinder 7 lost fuel causing an audible knock and visible engine vibration. The injector was removed to allow for a bore scope to be inserted. While removing the injector, it took more force than it should to remove. Once out, it was noticed that the injector was extremely fouled, and the copper sealing washer was left in the bore. The leaking sealing ring caused the exhaust soot to build up in the injector bore. After cleaning the injector and the bore, it was confirmed the washer was stuck in the bore. After attempting to use a pick to remove it the idea came up to use an easy out/extraction bit. An idea that worked very well. Bore scoping the hole, showed the sealing surface on the head was warped and pitted. Possibly causing the premature failure of the sealing washer. A new washer was installed and the injector was installed to specifications. The air was bleed and the engine started. All 8 cylinders fired.
Disturbing the soot while compression testing may have led to the immediate fouling of the number 7 injector. The failed seal could be to blame for the poor compression.
Next is testing the fuel system pressures and timing. As well as addressing the excessive use of coolant.

Any work being done on this engine is for educational knowledge and fun.
The end solution will be a complete engine overhaul.

Custom transmission cooler flush machine build.