Grinding noise on startup
Goodmorning, so I replaced the valve seals in my 2003 touring 350z. At the same time I replaced all timing chain tensioners just for the hell of it. I drove it for around 850km and now after the car sits for a while, cools down, there is a terrible metal on metal grinding sound on startup coming from the engine bay. It only happens for about 2 seconds then disappears. After that the car runs just fine. Wondering if anyone has had this problem and fixed it? could it be that I put in a faulty chain tensioner? Or would it be more from mal-lubrication of the chain? I read a G35 thread describing the same symptoms my cars having. The result of that was a new engine due to metal shaving being circulated throughout the engine. He said the best way to diagnose his particular issue was to drop the oil pan and check for shavings. I'm going to do that tonight but what are your opinions on the grinding sound?