Engine Rattle On Cold Start

[Oldun]

I have just joined the forum and would like some advice if possible. I hope this is the way to use the forum!

My 2005 Lexus GS300 with 56,000 miles (genuine)has occasionally a loud rattle on starting from cold. This may happen two or three times in a week and then vanish for quite a while. I have recorded the noise but my Lexus garage could not offer an explanation. I read that a member found that the torque converter drive plate was the problem and wonder how this was found out.

Thanks,

Oldun

[steve2006]

Any clues as to where you think the noise is coming from eg clutch transmission engine?

[Oldun]

Any clues as to where you think the noise is coming from eg clutch transmission engine?

Hi Steve,

I am certain it is coming from the engine compartment. If I start with door open whilst in garage I have stuck recorder under car and recorded noise. It really sounds like a bearing rattle and seems to last until oil pressure builds.

[dave1]

Hi Steve,

I am certain it is coming from the engine compartment. If I start with door open whilst in garage I have stuck recorder under car and recorded noise. It really sounds like a bearing rattle and seems to last until oil pressure builds.

Could you leave your car with your Lexus dealer overnight so that they could start car from cold and get a good listen to it. Much easier to diagnose that way than just listening to a recording.

[Oldun]

Hi Steve,

I am certain it is coming from the engine compartment. If I start with door open whilst in garage I have stuck recorder under car and recorded noise. It really sounds like a bearing rattle and seems to last until oil pressure builds.

Could you leave your car with your Lexus dealer overnight so that they could start car from cold and get a good listen to it. Much easier to diagnose that way than just listening to a recording.

Hello Steve,

Thanks for the reply. I am afraid the noise only occurs at irregular intervals so I cannot say when it will next happen. Perhaps I had better wait until it happens everytime I start!!

[steve2006]

There is a separate oil filter for the VVTI system which can clog and there deprive the cam adjustment system of oil

http://www.clublexus.com/forums/performance/401898-p1349-vvt-system-malfunction-bank-1b-blocked-oil-control-valve-filter.html

[Oldun]

There is a separate oil filter for the VVTI system which can clog and there deprive the cam adjustment system of oil

http://www.clublexus.com/forums/performance/401898-p1349-vvt-system-malfunction-bank-1b-blocked-oil-control-valve-filter.html

Very many thanks Steve. I will investigate further.