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About arkviz

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  • Lexus Model
  • Year of Lexus
  • UK/Ireland Location
  1. Did someone experienced rattling sounds from engine at startup? I do occasionally. It is similar to rattling when You want to put manual transmission in gear without using clutch. It lasts 2-3 seconds and engine is running normal. I can't measure it, but after this "hard startup" engine runs noticeably smoother. Problem is this happen not every time. It occurred few times last week. Before it didn't.
  2. I am really curious how sweetly does it run. My runs almost like diesel tractor.
  3. Thank You Luigi, now i see i have nothing installed. in my car.
  4. Yes, I've read that topic. Dealer assured me my car has already everything solved, instaled dampers etc... Your post reminded me about one more thing. When the car was new, it was very hard to recognize when the engine kicked in. Now it is kicking my *****. But not always.
  5. No I didn't. Dealer said, there is everything up to date.
  6. I don't think it has anything to do with injection or Premium fuel. Beside DI there are also port injectors and if I am right, they are (indirect) operating when engine is not under heavy load. This is 99% of my driving. Engine itself if quiet and smooth if it is not engaged to driveshaft. For example first hundreds of meters after cold start, or idling in sport mode, it is very smooth. Almost the same as a 6 pot. But once in "gear" whole car shudders like espresso maker.It is more perceivable at low revs. Vibrations are often very irregular. Increasing revs to about 2000 and vibrations are gone. Above 3000 it begins to vibrate again. This sounds more like loos exhaust pipe. It doesn't bother me so much, because i almost do not use this rev range. After longer driving there is another type of vibration. Doesn't matter how many revs there are, whole drivetrain is vibrating like jackhammer. And then there is sometimes a bluster sound. Especially when revs suddenly drop to 1000 on a highway. I am not a skilled constructor, but i have some points which can cause these problems. 1, Big engine, long stroke - physically must produce more vibration than same cylinder design of a half displacement. 2, heavy car, more load on engine - more vibrations 3, need for low emissions - too low revs - more vibrations. Older automatics didn't allow to go under 1300rpm. 4, need for elasticity - lighter flywheel - more vibrations 5, Atkinson cycle - May be? I think it rather reduces vibrations a little. 6, inline 4 cylinder configuration is the worst for vibrations. You can find many articles about that. 7, vibration dampers lost their capability. New car did almost not vibrate. 8, vibrations making all car parts worn. I Have problem with rattling or droning plastics around seat heating controls. The same and even worse can happen to important mechanical parts. This evening on my way home, car was surprisingly smooth. Not the best, but better than yesterday.
  7. We do have such laws, but their application in real life means no success. On the first page of manual, where warranty is described, there is an article about exclusion of increased engine vibrations and noises from warranty, as their are normal. Dealer says it is normal, so i have no other option, just drive it until it is totally worn and then change it. I don't know what is situation in Your country, but here in a land of noisy German 4 pot diesels, this is not seen as a problem by 99% of population. For me it is bad because i was driving only silent and very silent petrol cars since i got driving license in spring of 1997.
  8. I don't know for now. I can not change car before 2019. What I surely know, i will NEVER buy an expensive 4 cylinder car anymore.
  9. The best option for me would be to sell that car and purchase something older, cheaper, with serious engine...
  10. I switched from BMW because of this problem. It was even worse there.
  11. I already compared my car to another two 300h but both were IS. The much smoother one was 2013 model. 2017 IS was more like that of mine. Maybe facelift means cost optimization too and my car is missing something.
  12. If only electric motor is running, It is great. My suspicion is that engine is getting worn too fast.