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U320 questions

June 11, 2012, 10:59:38 pm

A nube here.  How many miles should one expect from a 2003 U320 before some major engine repairs?  WE are considering the coach that has 67K and claims to have all synthetic oil changes in the genset and motor.  Also are there any special considerations to take in with this coach.  Thanks in advance, David

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Re: U320 questions

Reply #1 – June 11, 2012, 11:14:53 pm

B50 (age at which half would need overhaul) for the ISM is listed as 750,000 miles. Should be even longer in a motorhome, which is VERY light duty for this engine-- it is used to pulling 80,000 pounds.

http://www.frontier-intl.com/Big%20Bore%20Comparison%20Guide.pdf

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Re: U320 questions

Reply #2 – June 12, 2012, 05:49:08 am

Retired Chief, not to worry you will wear out before the motor transmission and drive axle will, as long as you do the proper service on it.

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Re: U320 questions

Reply #3 – June 12, 2012, 06:34:18 am

Prolonged storage is the only thing that can appreciably shorten the lives of these otherwise very durable drive trains if recommended service is completed.  Synthetic lubricants are fine so long as they are not used to extend change intervals without analysis.

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Re: U320 questions

Reply #4 – June 12, 2012, 07:00:50 am

I bought an 2000 U320 with 117K miles on it and didn't give it a second thought.  Fear not

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