The specifications for various Nissan intake and exhaust valves and valve lifter service parts have been changed. This applies to 2004-2013 Titan (A60) and Armada (TA60), 2012-2013 NV (F80), 2008-2012 Pathfinder (R51) , 2005-2014 Frontier (D40) and 2005-2014 Xterra (N50) vehicles.
The valve stem length of both intake and exhaust valves has been increased and is a direct replacement for the shorter style valve. The related valve cup lifter has been shortened to accommodate the longer valve and the point at which the valve lifter contacts the valve stem has been shortened. These service parts will require that the valve and valve lifter be replaced at the same time.
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Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.