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<p>[QUOTE=&quot;Lone Ranger 13, post: 3355458, member: 96834&quot;]I have a CAT C-15 6nz.&nbsp; It blew a head gasket&nbsp; at 448k miles. Fixed under warranty.&nbsp; Haven&#039;t had any real trouble since. Had to replace an oxygen sensor and a bad wire on the jake. Don&#039;t remember anything else . 1.1 million miles.&nbsp; Runs great. </p><p><br /></p><p>Is a 7cz&nbsp; a C-16 ? As long as it isn&#039;t a bridge motor or a an acert, it should be good.&nbsp; Mine has been real dependable.&nbsp; And can average 6.5 mpg if driven about 60-63 mph and keeping idle low.</p><p><br /></p><p>Btw , the head gasket thing was a defect. I got a new head and 2 cylinder kits . I could have had the other 4 cylinder kits changed for $1700. But I wasn&#039;t gonna keep the truck . If I had that to do over........[/QUOTE]</p><p><br /></p>

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