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Old 12-16-2017, 12:20 PM   #391
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The only decal remaining is the large "SCHOOL BUS" above the windshield.
May knock that out in a little while or just do it tomorrow.
ECCB, I have the option to purchase this bus. Does anyone know anything about it? Thomas Bus with Cummins 8.3 motor. Looks similar to yours.

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Old 12-16-2017, 12:40 PM   #392
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ECCB, I have the option to purchase this bus. Does anyone know anything about it? Thomas Bus with Cummins 8.3 motor. Looks similar to yours.

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An 8.3 in a bus that short would be wild.. and unlikely. Can you get the VIN #?

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Old 12-16-2017, 01:10 PM   #393
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That would not be a slow bus. If that bus is in good shape you won't likely be disappointed.
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Old 12-16-2017, 03:05 PM   #394
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Make SURE its an 8.3. Never seen one in a bus that size. That would be AWESOME!


I got some bad news today. Fired up the bus, and ten minutes into running I saw coolant pooling under the passenger side front of the engine. Above the waterpump. Behind the alternator, under the thermostat housing. I'm 99.9% sure that the culprit is the front engine cover aka timing cover. The spot where the leak is coming from would be right where the coolani inlet and outlet to the block are.

Anyone replaced this before? Looks do-able but like a huge job.
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Old 12-16-2017, 04:35 PM   #395
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Your luck is still holding out, because this coolant problem didn't occur on the trip from TX.
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Old 12-16-2017, 04:47 PM   #396
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Your luck is still holding out, because this coolant problem didn't occur on the trip from TX.
Exactly!
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Old 12-16-2017, 04:59 PM   #397
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Sorry man I don't know your engine.?
To me the thermostat housing and the water pump housing is and should be seperate from the timing chain itself and its cover?
Unless your water pump,thermostat housing and timing chain are cast as one piece which might have been an idea but never should have been produced?(my opinion)
Not suggesting it but I have seen mechanics back the bolts out enough to seperate the flanges off of whatever without removing anything. Then they would cut/slot the bolt holes to the inside and snip the bottom(cause that's where the leak will show) clean the fragments off and slip the new gaskets in with a lot of high temp silicone/gasket maker?
I don't do that but I would start with the thermostat housing and thermostat and not the timing chain cover.
If your water pump is above/around/over the timing chain cover then I would look at the weep hole in the bottom of the water pump. If it is that then the radiator fan could be blowing the coolant back onto the top of the timing chain cover and running down?
Good luck
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Old 12-16-2017, 05:01 PM   #398
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Need pics to help?
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Old 12-16-2017, 08:28 PM   #399
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Sorry man I don't know your engine.?
To me the thermostat housing and the water pump housing is and should be seperate from the timing chain itself and its cover?
Unless your water pump,thermostat housing and timing chain are cast as one piece which might have been an idea but never should have been produced?(my opinion)
Not suggesting it but I have seen mechanics back the bolts out enough to seperate the flanges off of whatever without removing anything. Then they would cut/slot the bolt holes to the inside and snip the bottom(cause that's where the leak will show) clean the fragments off and slip the new gaskets in with a lot of high temp silicone/gasket maker?
I don't do that but I would start with the thermostat housing and thermostat and not the timing chain cover.
If your water pump is above/around/over the timing chain cover then I would look at the weep hole in the bottom of the water pump. If it is that then the radiator fan could be blowing the coolant back onto the top of the timing chain cover and running down?
Good luck
Its not the water pump, that's solid and working, no leaks there. Not the thermostat housing. Its the top left corner of the front engine cover, which directs the water to the block from the pump.

Here's a pic from google, you can see where the water pump mounts to the lower left and the coolant goes up to the block through a channel, and back through another channel next to it. The gasket can fail allowing coolant to leak out or into the other areas of the timing cover.


here's what the backside of a 466 front cover looks like-


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Old 12-17-2017, 04:38 AM   #400
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Hope you get it softed out atleast yor are home and not on the road. Does your bus have a split radiator/inter cooler?



Thanks Joe
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