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03-04-2013, 06:22 PM
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#1
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Senior Member
Join Date: Jan 2013
Posts: 344
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visual difference between c and ISC 8.3
Can a person with some knowledge of diesel engines (we have 3208 cats in a boat) visually determine if it is a C 8.3 or a ISC 8.3. What should I look for besides a tag somewhere on the engine. Some owners I have found don't know which they have. Thanks
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03-04-2013, 06:45 PM
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#2
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Senior Member
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,587
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The ISC went into production in March of '98. All the ISCs I have seen have "ISC" embossed on the front cover of the engine.
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Steve Ownby
Full time since 2007
2003 Monaco Signature
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03-04-2013, 07:21 PM
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#3
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Senior Member
Join Date: Jan 2013
Posts: 344
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A 1998 Monaco Dynasty probably has the older 8.3 because it is probably a 1997 Chassis. Would that be a vaild possible assumption? Thanks
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03-04-2013, 07:41 PM
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#4
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Senior Member
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,587
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Quote:
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Originally Posted by fighterpilot
A 1998 Monaco Dynasty probably has the older 8.3 because it is probably a 1997 Chassis. Would that be a vaild possible assumption? Thanks
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Maybe less so with Monaco. Since Monaco owned Roadmaster and the chassis were built in the same production facility, they did not tend to have a big inventory of chassis. On the roadside wall at the drivers seat there should be a chassis data tag that might have a date. Of course the Cummins engine could have been in inventory a while.
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Steve Ownby
Full time since 2007
2003 Monaco Signature
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03-04-2013, 08:53 PM
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#5
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Senior Member
Join Date: Dec 2009
Location: North Texas
Posts: 1,061
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The easiest way to tell the difference is every C8.3 I have ever seen has been all black. Every ISC 8.3 has been all red, or black with a red head.
That would be the first clue, then you're back to looking at the timing gear cover which others have said, will have ISC stamped on it if it's an ISC. Finally looking at the data plate (on the top edge of the timing gear cover) will tell you for sure.
BTW... This color does not apply to Marine engines. They are painted per customer specs. Mercruisers all black. OMC. all white.
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03-04-2013, 09:15 PM
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#6
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Member
Join Date: Jul 2011
Posts: 68
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I have an ISC and it's all black.
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03-04-2013, 09:47 PM
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#7
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Senior Member
Country Coach Owners Club
Join Date: Dec 2010
Posts: 7,804
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"The easiest way to tell the difference is every C8.3 I have ever seen has been all black. Every ISC 8.3 has been all red, or black with a red head. "
I have never seen an all red ISC installed in a coach. Those I have seen are all black. Mine is all black plus it says "ISC" in the front of the engine.
The ISL is black block with red valve cover
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03-05-2013, 05:58 AM
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#8
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Senior Member
Join Date: Jan 2013
Posts: 344
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Would the injector pump be the same, looks, location etc.??
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03-05-2013, 06:15 AM
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#9
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Administrator in Memoriam
Newmar Owners Club Retired Fire Service RVer's Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,898
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My ISL was all red.
It seems the only thing consistent in the RV industry is it's inconsistency. 
Quote:
Originally Posted by dons2346
The ISL is black block with red valve cover
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Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP
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03-05-2013, 06:22 AM
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#10
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Member
Join Date: Jul 2011
Posts: 68
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While the location is the same the CAP looks different the the C pump. I haven't seen a common rail setup but I'm sure it looks different too.
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03-05-2013, 07:26 AM
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#11
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Senior Member
Monaco Owners Club Texas Boomers Club
Join Date: Jan 2009
Posts: 2,529
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So if your 8.3 is all grey it's a ____________???
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Hal & Ginny Miller '04 Beaver Santiam PRT40
'04 Saturn Vue - US Gear Brake - Blue Ox tow
3"girls" (2 Irish Setters - 1 Retriever) - RIP Annie & Emily (12/26/2017)
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03-05-2013, 07:29 AM
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#12
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Member
Join Date: Jul 2011
Posts: 68
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Grey 8.3
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03-05-2013, 12:30 PM
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#13
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Senior Member
Damon Owners Club Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,946
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my ISC is redish orange
and has a big ISC embossed on the valve cover
ISC also has a ton of sensors the conventional engine is missing
and a big ECM box on the left side of the engine by the injector pump
but as for color??????
i have seen cats and cummins as blue, black, white and red in boats
my boat days most were white so leaks would show up better, or so we were told 
red in a rv?
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USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads
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03-05-2013, 02:47 PM
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#14
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Senior Member
Join Date: Aug 2011
Posts: 1,126
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fighter a "C" engine will have a p7100 pump.....the fuel lines will come out of the top side of the pump
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96 Dynasty 36' that does NOT wander, thanks to RuppParts.com and their superior "poly" suspension bushings
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