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Old 02-01-2019, 06:51 AM   #1
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Isc 350

Hi, is this engine any good? is there anything I should be aware of?
it's in a 2002 allure. thanks
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Old 02-01-2019, 06:55 AM   #2
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Good engine. Had it in our '02 DSDP and no problems even after adding a Banks kit to it.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
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Old 02-01-2019, 08:42 AM   #3
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ISC, as is it's slightly larger brother the ISL, are solid Medium Sized diesel engines.

The ISL in CC's, as well as the CAT C9 (Another fine Medium Sized diesel.), do have Compression Jake Brakes - which is IMO an advantage over the ISC's with Exhaust. (Note, not all ISL's have Jake Compression. Newmar may, or may not, have it on the ISL, depending upon year and specific Model you're looking at.).

Both ISC/ISL, will run well for you. Exhaust Manifold warping and or cracking can be 'if' not 'when'. And older CAPS era engines had Lift Pumps that can sometimes need replacement. Neither of these are a given 'going to happen', and IMO are not a deal breaker. Just know it going in, that it's something to keep an eye on.

If you end up going with a coach with the ISL, and it is in or near the 2006 model years - get the specific engine in questions Serial Number, and check this forums Cummins section, you'll find a Stickey with the serial number ranges of potential Wrist Pin problems. Another item to be aware of, and if the engine is suspect, negotiate a lower price point for the risk of failure... Enough to cove a Extended Warranty, to protect you.

Happy hunting,
07 Country Coach Magna Rembrandt 45' ISX600
Roo II was our 04 Country Coach Allure 40'
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Old 02-01-2019, 08:52 AM   #4
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I've got a ISC 350 in my 2002 Monaco Windsor, ~107K miles on it.
I did have to replace the exhaust manifold, when I did it I had found multiple posts of others having the same problem. Cost ~$650 to repair myself, not a bad job other then I wish I had a 2nd pair of hands .

There are also posts regarding the lift pump leaking. I have not had this problem but I do carry a spare gasket to get me home if it starts.

Neither of these issues should deter you from looking at the CC as the engine has a good history overall.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 02-01-2019, 09:43 PM   #5
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Well, I've only got 168,000 miles on mine so it is to early to tell if it is any good or not.

I'll bet it will out last me
2002 Country Coach Intrigue
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