2008 Model / Ocassional Ticking/rattling/tapping Noise At Start Up (No

[reza]

Hi everyone,
I just bought my first Lexus ever (2008 IS250) less than 2 month ago! Whilst I’m pretty happy with the car, but something is really annoying me!

Occasional and intermittent Ticking/Rattling/Tapping Noise at start up!!!! (just happened 3-4 times since 1 month ago and NONE of them happened at the cold start!)

I know there were well know problem of rattling noise at the cold start for pre-07 models which apparently the problem was faulty VVT hub or something like that and it was a TSB published regarding this problem. BUT mine is 2008 model (apparently they already fixed the problem after 07!) and never happened at the cold start!

I bought the vehicle second hand from Lexus dealership and will run out of statuary warranty soon (2 weeks), I tried to convince them about the problem but since it’s occasional, then I couldn’t replicate the problem at Lexus dealership and prove it to them!
I tried to capture it on tape but no success yet. They are refusing to fix the problem

The sound is more like a very rapid clicking (like switching noise - something (electronic?) is switching in the engine bay rapidly for less than second or trying to switch) which happen when the speedometer & tachometer needles getting close to the end range. I checked if the noise coming from needless or not , but the actual noise coming from the engine bay or somewhere behind the dash.
The sound is very similar to the clicking sound of engine if someone try to start it with dried battery (but this clicking sound is much faster and happens when the engine already started running) - i tried my best to explain this strange sound

the period of the sound is sometime just one click/rattle after start up and sometimes 4-5 click/rattle after start-up(which all happens in less than second)

Also,
Another intermittent and occasional problem is water gurgling (bubbling noise) sound coming from behind the dash and more frequent in hot days. This problem is also very intermittent and occasional and happens in start (NOT necessarily cold start). My research end up with possible water-pump problem or coolant air-lock (just saying as I'm definitely not an expert or mechanic!).

I desperately appreciate your help!

Any idea? How can I prove it to them? I sold my PUG407 and bought a Lexus to live a hassle free life! Cannot afford another challenge and fight for this one again!
Please tell me how to handle this problem or better to sell this !
I’m so fussy and spent heaps of $ to rectify numerous problems on my previous car and don’t have neither money nor energy for this one!

thanks mates!

[Zaero]

there are plenty of threads on this already, try using the search function before posting.

[reza]

[reza]

fortunately i managed to catch the rattling noise on video, however, the quality is not so good and you need to lesson carefully to the video to hear the rattle between second 2 and 3 of the video. as i said before the noise show up so intermittently and it's so hard to tape it and i videoed it after couple of days of try! probably i can tape it again in better quality, but i send it to you as a proof of the noise , i will enhance the video later on to make the noise more clear and send it to you again

[ilv1004s]

please do a search before you make new threads thanks

thread closed