Hello all,
First post here, been reading for over a year since I bought my Titan.
Purchased a 2018 SV Titan in October of 2021 with 13,000 miles. Got a good deal (so I thought) since it has a branded/rebuilt title. Bought it from Autosavy, a dealer chain that specializes in purchasing totaled vehicles and repairing and reselling them if it makes financial sense. Did not purchase their extended service plan, sold from a 3rd party, as line two of the exclusions states it did not cover vehicles with rebuilt/branded titles.
At about 20,000 miles, spring of 2022, I started noticing the knock. Started very faintly on cold start up and would go way when warm. This progressed to knocking all the time and got much louder. Knowing the factory warranty is no longer intact with a rebuilt title. I decided to gamble and go ahead and have it officially diagnosed at a dealership, not Autosavy, with the chance that Nissan might partially pay for a shortblock since it's a known manufacturing defect. Dealer verified that cylinder 7 was scored up, submitted to Nissan, and they told me to take a hike. No valid warranty, they won't pay anything.
Called Nissan customer care and they basically told me the same thing. Wouldn't even give me a discount on a longblock. New longblocks come with a 1 year / 12,0000 mile warranty. I'm pretty sure when I inquired about this with customer care in the same call she stated that it's only valid if installed by a dealer or ASE certified shop. If not, no warranty.
I decided to take the chance and purchase a longblock directly from Nissan in July of 2022. Build date for the engine according to the crate it came in is May 2022. My brother in-law and I installed it in his garage in August. That was brutal, I have pictures to share in case anyone cares. New engine runs like a dream, quiet, all that.
Fast forward to about a month ago and I can start to hear very faint knocking at cold start up again when under load at low rpms. Classic symptoms of piston slap. It goes way when warm, though once I swore I could still hear it a bit after being fully warmed, but I may just be paranoid at this point. Engine has about 8,000 miles on it at this point.
So I think I'm SOL with any kind of warranty on the longblock if it comes to that. I have purchased an endoscope to scope cylinder 7 myself to see if scoring is present again. Just waiting for it to stop snowing. There is a possibility that these engines might be a bit prone to cold piston slap and long as it doesn't progress to the severity the previous engine exhibited and continues to go away when warmed up I will live with that. If it progresses and I have another full blown knocker on my hands I guess I'll try getting a warranty replacement. No confidence in that through.
I will update after scoping. And thanks to anyone that has read all the way to the bottom
