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<blockquote data-quote="PoManNox" data-source="post: 23824" data-attributes="member: 8300">Timing chains on your standard port injected OHC engine could indeed last ~300K miles or more.&nbsp;&nbsp; The problem today is GDI.&nbsp; You wont find a single GDI engine that will go that distance on the factory timing gear.&nbsp;&nbsp; A theory I have on that is the volume of soot GDI contaminates the oil with acts as an abrasive.I experienced it myself with my 2019 Nissan Pathfinder with the GDI VQ35DD engine.&nbsp;&nbsp; Granted I did buy it as a 1yr old ex-rental with ~25K miles on it, but despite my insane oil/filter change regimen, in 2024 with 105K miles on it, it began with the early stages of the death throw sounds from the timing chains and associated equipment.&nbsp;&nbsp; I traded it in vs fixing it knowing it's a common failure on this VQ engine.&nbsp;&nbsp; I changed the oil/filter on that beast&nbsp; myself every 3500mi without fail from 25K to over 100K miles.&nbsp;&nbsp; Excessive timing chain wear is a problem on GDI.</blockquote>

[QUOTE="PoManNox, post: 23824, member: 8300"] Timing chains on your standard port injected OHC engine could indeed last ~300K miles or more. The problem today is GDI. You wont find a single GDI engine that will go that distance on the factory timing gear. A theory I have on that is the volume of soot GDI contaminates the oil with acts as an abrasive. I experienced it myself with my 2019 Nissan Pathfinder with the GDI VQ35DD engine. Granted I did buy it as a 1yr old ex-rental with ~25K miles on it, but despite my insane oil/filter change regimen, in 2024 with 105K miles on it, it began with the early stages of the death throw sounds from the timing chains and associated equipment. I traded it in vs fixing it knowing it's a common failure on this VQ engine. I changed the oil/filter on that beast myself every 3500mi without fail from 25K to over 100K miles. Excessive timing chain wear is a problem on GDI. [/QUOTE]

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