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Lexus GS 450h Engine Problems

9 messages,  Last post on Feb 22, 2012 at 8:17 AM

You are in the Lexus GS 450h Forum.

What is this discussion about? Lexus GS 450h, Engine, Hybrid Cars, Sedan

Messages Page 2 of 2

#6 of 9 Re: Crunching noise in engine of GS450h at startup [groary] by pf_flyer HOST

Jun 04, 2011 (11:41 am)

Replying to: groary (Jun 04, 2011 7:14 am)
A crunching noise? That feels like it can't be good, even though it goes away. I'm no expert, but the timing chain doesn't seem like it would be a culprit to me (remember, no expert) as those chains would have very little play in them right? If a chain was making some kind of noise, I would imagine that it would keep making it.
 
Now to be like Car Talk ... could you be more descriptive of the noise. Is it a metallic crunching?

#7 of 9 Re: Crunching noise in engine of GS450h at startup [pf_flyer] by groary

Jun 05, 2011 (5:04 am)

Replying to: pf_flyer (Jun 04, 2011 11:41 am)
the noise sounds like that the starter motor takes longer than usual to disengage when starting however i am told that the gs450h cars dont have a starter moter and that the car is started with the hybrid motor instead which is engaged continuosly so that rulles that out . the garage has told me that the noise is only presant until the oil get around the engine ???? why was this noise only just appeared?? however there is a small device which expands with oil pressure that puts pressure on the wear strips of the timming chail to stop it from rattling I wonder if this is the reason why is noisey at startup????? if there is any other gs450h users out there with the same problem please let me know???
 
regards John

#8 of 9 Re: Crunching noise in engine of GS450h at startup [groary] by sammysm

Jul 14, 2011 (5:09 pm)

Replying to: groary (Jun 04, 2011 7:14 am)
I have a 2007 GS 350 and I'm getting the same noise on start up randomly about once a week. Lexus tells me they can't do anything unless they can duplicate the problem. My guess is it's the timing chain. It's frustrating and not what one would expect from a $50,000+ car.

#9 of 9 Re: Crunching noise in engine of GS450h at startup [sammysm] by groary

Feb 22, 2012 (8:17 am)

Replying to: sammysm (Jul 14, 2011 5:09 pm)
To all i am told by lexus that its one of the petrol pumps that makes that noise on start up
 
Regards John

Messages Page 2 of 2

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