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Old 08-11-2015, 08:16 PM   #121
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Awesome work! It'll be nice to have the peace of mind that everything is in good shape (other than the o-rings at the moment) once you get it back together.

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Originally Posted by onenationundergoat View Post
Once all of that is removed, we had to detach a few hoses and a pipe to make room for the head to come out. For some reason the school district plumbed a garden spigot into the coolant system, maybe to turn the heat on/off in the cab?
School buses typically come from the factory with those valves. As you guessed, it's to turn off the flow of coolant to the heaters during the summer.
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Old 08-11-2015, 08:38 PM   #122
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By the livin' Gawd that made you,. You're a better man than I am, Gunga Din!

Looking good guys. Be sure to check and abide by all related torque specs when going back together. Do you have a factory book for your motor?
Yeah that's the first thing I got when I bought the bus! It has all the torque specs and bolt pattern order in it. Although idk how we're gonna gauge the torque on some of those bolts. They're too dang hard to get to!
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Old 08-11-2015, 08:39 PM   #123
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I might be wrong (usually am) but I thought a DT360 had 4 rings on each piston.
Help me out somebody.
There are four grooves but only three O rings. The sets for sale also only include three rings per cylinder.
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Old 08-11-2015, 09:13 PM   #124
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Today we took the injector nozzles to a diesel mechanic friend of my dad's who owns his own shop to see if he could clean them. He said he no longer has the equipment for that and it's almost as expensive to have them cleaned and tested as it would be to buy new ones. Idk about that. But anyway he said they looked ok and are hard to damage inside the engine. We're gonna just clean them with ScotchBrite like he said. He also did recommend using dish soap (no water) to insert the cylinders and o-rings back in place to the o-rings wouldn't swell and get caught going in.

And then as he and my dad were chatting about the lack of power he went in the back and pulled out a NEW Garrett turbo, about twice as big as ours. And gave it to us. For free. He said it had just been layin' around for ten years because it came in a lot with other parts he bought and he didn't need it. The thing is worth over a grand. So maybe we won't have power issues anymore! I couldn't say WOW and THANK YOU enough!





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Old 08-11-2015, 10:14 PM   #125
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Finally some good luck getting that new turbo!
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Old 08-11-2015, 10:33 PM   #126
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I've tried looking up the specs to see exactly how much difference it's gonna make but I can't find much info about it.
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Old 08-11-2015, 10:42 PM   #127
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Something to consider. A lot of diesel hot rodders add mongo turbos, sometimes several of them. But you have to be careful how much extra boost you pump in. The head studs will only handle so much pressure and I know it is common on Cummins that are pumped up to replace the cylinder head studs with larger, stronger ones during one of the these "pump you up" jobs. Otherwise, heads have been known to separate and go boom.

Garrett should be able to give you some direction on this.
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Old 08-11-2015, 11:01 PM   #128
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This one has a waste valve for any extra pressure that would be bad for the head. Not looking to soup it up too much. No sense in making a 360 into a drag racer!

https://youtu.be/86E9d5PMCxA
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Old 08-12-2015, 12:00 AM   #129
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The question is still...what pressure will be going in and what can the motor handle? The wastegate may or may not be compatible with your otherwise stock engine. Might be fine...or...
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Old 08-12-2015, 12:15 AM   #130
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It appears that the oil control ring on the piston you were holding
when you were displaying the rod bearing, had the end gaps lined
up rather that spaced apart as called for. Looks like a green
mechanic may well have assembled this engine. Also it looks as if
the bearing has a dull appearance on the contact surface from
the babbit reacting with the coolant. Before final assembly you
may want to apply pressurized oil to the oil galleries to see if
the clearance on the mains and cam bearings is still good.
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