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Join Date: May 2005
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Originally Posted by HighTQCummins
are wet sleeve what they use in big diesels? Now I am confused
the ISC and bigger Cummins use a steel sleeve that is pressed into the cast block making it easier to rebuild. some are wet in the fact that they create the barrier between the cylinder and the waterjacket. but there are also others that are dry and have no contact with the coolant
the 5.9 and 6.7 are what they call a parent bore engine. the cylinders are part of the blocks casting like a gasser engine.
the 5.9 has water jackets cast into the engine all the way around each cylinder and the cylinders are not connected to each other along the length of the bore.
in the 6.7, each cylinder shares metal with the adjacent cylinder making them siamesed together. with a living animal dependant of how badly they are "siamesed" , one or both would die if they were separated since they are sharing parts. The same principle applies with the 6.7. Also due the the bores being siamesed there is no way to have a water jacket separating them so there will be spots in the cylinder walls that will be hotter that other areas, which can cause distortion of the cylinder walls and a loss of compression. If this is even going to be a concern with the 6.7 is yet to be known. I bet Cummins knows but they aint gonna' tell.
Current: '07.5 2500 QC/SB ETJ/68RFE, 4x4, Fabtech 6" lift, KMC XD "Diesel" 20x10 wheels, Pro Comp X all terrain 37x13.5R20 tires, BDog P Pup AFE, MegacannonII, H&S Gen 1 DPF Delete, EGR unplugged. Dynoed 361hp/677tq 20090220
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