Posted by jdemaris on March 08, 2014 at 06:10:12 from (70.194.8.71):
In Reply to: 6.5 or 7.3 posted by blue924.9 on March 07, 2014 at 17:27:35:
The 7.3 IDI is a much heavier built engine then any GM made 6.5. The newest 6.5s made for the military have been beefed up quite a bit but that doesn't count.
7.3 has a forged-steel crank, all gear-drive in front, heavy cylinder heads with hardened valve- seat inserts, heavy block, etc.
6.5 has a cast-iron crank, chain drive in front, light cylinder heads that WILL crack when the ports get hot, a light block that will crack at the main-bearing webs after X amount of miles, etc. There is no way to fix the main-web cracking problem. GM tried with later 6.5s by making the outside main-cap-bolts smaller thus leaving more block metal. It helped but did not fix the problem. I would not trust any 6.2 or 6.5 for long-distance travel unless the oil-pan got pulled and the main webs got checked for cracks. Once they show - it's ticking time-bomb. Often around the 200K mile mark.
I still have my 1994 IDI turbo 7.3. 350,000 miles on it and the engine has never been apart. 4WD, extended cab, long-bed, 4.10 axles, E40D trans. Gets 17-18 MPG empty on highway in the flatlands of Michigan. Gets 16 MPG in hilly New York.
I've also got many 6.2s and 6.5s. Running and blown-up with broken cranks and blocks. I like them because they've always been easy to buy cheap.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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