Posted: Aug 15 2006 at 12:59pm | IP Logged
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My 2006 has 11000 Km on it and started the "Cold Start" knock around 8000. I am about to take the truck to the dealer for advice. To me, it sounds like noisy lifters. Lifters can loose oil pressure when the engine hasn't been running for a day or so. I had a 93 Mazda MX6 and at 70 thousand Km (same engine configuration, 4 valves per cylinder, double OH cams) it use to do the same thing when cold. 2 dealers told me it was normal, one said they could fix it. They all said it was due to the lifters lossing pressure overnight, but as soon as the engine was started, the lifters would pressure up and the noise goes away.
The dealer installed new lifters, cams, reseated valves, nearly rebuilding the top of the engine and the noise was still there. I switched to synthetic oil, no change. I later moved from East coast Canda to the West Coast and for some reason the cold start lifter noise stopped!
I believe the Titan has the same problem and from what I've read on the Net, the dealers won't do anything. My last truck was a 98 Isuzu, again with the same multi-valved, dbl OH cams and it never made any noise on cold starts. So I belive the problem can be fixed its just that Nissan won't spend the money to do so.
Other than that, I love the truck. Although I can't get anywhere near the mileage they say I should get and I drive like an old lady!
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