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Old 02-13-2017, 02:03 AM   #1
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Join Date: Sep 2016
Location: Fayetteville Arkansas
Posts: 419
Year: 1991
Coachwork: Carpenter
Chassis: GMC G3500 Vandura
Engine: V-8 5.7L Gas
ISC not 8.3?

I found a bus for sale 1T7HR4B23W1159907 that said Cummins ISC six cylinder turbo diesel engine. Sure enough the picture was six separate cylinders. I'm confused because I thought the ISC was the 24 valve with indentions on both sides if its mechanical and flat on one side if its electronic. What am I supposed to make of this?

-Thomas
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Old 02-13-2017, 06:50 AM   #2
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Join Date: Mar 2015
Location: hills of sw virginia
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Year: 1996
Chassis: thomas
Engine: 8.3 cummins
Rated Cap: 11 window
what year is the bus? around 97 was the last year of mechanicals.
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Old 02-13-2017, 07:19 AM   #3
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Join Date: Sep 2016
Location: Chapel Hill, NC
Posts: 855
Year: 2002
Coachwork: Blue Bird
Chassis: All American
Engine: Cummins 8.3/Allison MD3060
Rated Cap: 84
Can you post the picture for us?

If the valve cover looks like six separate boxes, that's a mechanical 5.9L.

The only engine "ISC" refers to is the electronic 8.3L, but this definitely wouldn't be the first time we've seen a seller that didn't know what they were talking about.
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Old 02-13-2017, 07:28 AM   #4
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Join Date: Nov 2015
Location: Midwest
Posts: 2,573
Year: 2003
Coachwork: BlueBird
Chassis: TC2000
Engine: 5.9L Cummins
Rated Cap: '00
Is this it?

Lotsa hours.
mediocre trans 545

1998 Thomas Built Saf-T-Liner MVP ER bus
6,898 miles on odometer
8,137 hours on meter
Miles and hours may vary, unit is still in use
Cummins ISC six cylinder turbo diesel engine
Automatic transmission
Single axle
Heat
Air suspension seat
(17) adult seats
Seat belts
Braun wheelchair lift
Ceiling, rear, and side emergency exits
Emergency door alarms
Front and rear tow hooks
240" wheelbase
Spring suspension
Air brakes
11R22.5 tires
GVWR 30,000 lbs
Unit# 142
Oklahoma title
1T7HR4B23W1159907
Victory Christian Center
7700 S. Lewis Ave
Tulsa, OK 74136
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Old 02-13-2017, 07:40 AM   #5
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Engine: Cummins 8.3/Allison MD3060
Rated Cap: 84
Quote:
Originally Posted by Rusty View Post
Is this it?
Ahh, I hadn't even thought of doing any internet sleuthing to find the listing. Good idea.

Thomas, if this's the auction you're looking at... https://www.purplewave.com/auction/170215/item/DB2284

...then that's definitely not an ISC, that's a mechanical 5.9, also known as a 6BT.

And it has an Allison AT545 in it.
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Old 02-13-2017, 12:56 PM   #6
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Join Date: Sep 2016
Location: Fayetteville Arkansas
Posts: 419
Year: 1991
Coachwork: Carpenter
Chassis: GMC G3500 Vandura
Engine: V-8 5.7L Gas
Yet the VIN decoder even said ISC. Oh well the search continues. Thanks

-Thomas
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Old 02-13-2017, 12:59 PM   #7
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Join Date: Nov 2015
Location: Midwest
Posts: 2,573
Year: 2003
Coachwork: BlueBird
Chassis: TC2000
Engine: 5.9L Cummins
Rated Cap: '00
Quote:
Originally Posted by Thomas1985 View Post
Yet the VIN decoder even said ISC. Oh well the search continues. Thanks

-Thomas
You are doing it right- Most places do not know what they are selling- at all. Ads are written by administrators, not Fleet guys.Keep posting pics here for id.

My bus was listed at 25' and is actually 40', to give an idea.

It'll happen, when you find 'the one', grab ahold with both hands.
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Old 02-13-2017, 03:52 PM   #8
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I seriously doubt any 8.3L was ever hooked to an AT545 transmission.

Some low HP DT466 engines were hooked to AT545's but the 8.3 or 6CT engine had too much HP and torque, even in derated versions, to hook to an AT545.
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Old 02-13-2017, 08:34 PM   #9
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Location: Greater Houston, Tx.
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There's a nice 8.3 Thomas BB listed in Sacramento C/L. Don't know why, but seller said the maint. records didn't come with it. Way too big for my purposes, but may be what you're looking for.
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Old 02-14-2017, 09:27 AM   #10
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Join Date: Dec 2016
Location: Calgary, Alberta
Posts: 134
Year: 2001
Coachwork: Thomas
Chassis: Freightliner
Engine: Cummins ISC 260/660
Rated Cap: 81
My Thomas bus has s ISB 5.9 but when the VIN is searched it shows that it has a ISC.

Personally I don't trust any sales people; I look for myself.


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