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IS250 making diesel-like noise

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Old 11-10-14, 03:13 AM   #1
Braincake
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Default IS250 making diesel-like noise

Hi guys,

Since 2013 I am driving a 2007 IS250.
The car has about 62.000 miles on it and since some weeks (basically since it got cold) the engine started to make a clear knocking sound.
It can be described as a diesel sound and I found a video on YouTube with exactly this sound:

http://www.youtube.com/watch?v=FmbynU-YW2k#t=134

I went to my local Lexus dealer, where I also bought the car, and they did the following:

1. At the first visit they took the car and told me that 3 people listened to it and they didn't hear anything.
2. After picking up the car again I still heard the noise and made another appointment. This time, they listened to the car with cold engine and they told me that the problem was in the high-pressure fuel pump. Replacement would cost about 650 euros without guarantee that the noise will be gone.
They said that a noisy high-pressure fuel pump is no problem... (wut?!)

Last weekend I investigated the noise myself. It comes from the driver-side at the rear of the engine (the high-pressure fuel pump is on the passenger side!). When I listen with a screwdriver, it is very clear. The noise also exists when the engine is warm, but then it is less loud. It can be clearly heard when I push the throttle from 1000-2000 rpm (light load conditions).

I try to have a second opinion at an other mechanic and let him do a compression test as well.

As I read a lot of different opinions/stories about the IS250 having piston slap or cold start noises, it would be nice to hear from someone who had this same problem. I hope you can help me!

Just to be sure, it is not the second-long cold start rattle as known per TSIB and it is also not the VVT-i or injection system noise where IS250's are known for.
It is a diesel-like sound, identical to the sound on the YouTube video posted above.

Thanks a lot!
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Old 11-10-14, 09:49 AM   #2
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Its normal for a car to sound this way when its cold, mostly when its in the 30f or 0c range, or colder.. Id just run some fuel additive that has cleaners and lubricants to help with that alittle. Or so iv seen it help a tiny bit... So try that. Not sure where you from but in the states we have...

Click the image to open in full size.



Try this out... Not much else you can do, unless you decide to try a diff car that doesnt have piston slap... I know my 2006 with 105k miles has it really bad when its cold, but goes away in the summer when its hot...
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Old 11-11-14, 01:15 AM   #3
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Thanks for your reply!

It kind of eases my mind that it is not a big problem.
I already tried injector cleaner now, so I'm observing if it will work.

I live in Germany and it is now right above 0C or 32F.

To be sure I will await the results of the compression test and then talk to Lexus again.
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Old 11-11-14, 06:46 PM   #4
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Do you have the carbon build-up TSB for cars in Germany? Look up this issue on the forum here.
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Old 11-11-14, 06:51 PM   #5
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I took mine in and they rebuilt the engine
But originally told me it was the cam gears
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Old 11-12-14, 02:05 AM   #6
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Quote:
Originally Posted by sktn77a View Post
Do you have the carbon build-up TSB for cars in Germany? Look up this issue on the forum here.
I have seen posts about this, but I didn't find infos about if the TSB is valid in Europe.

It is true that my car didn't have a lot of highway miles lately though.
I tried to see if it worked to put the gear fixed in 3rd and drive with about 3000-4000 rpm for some time to blow the engine clean a bit. It seemed to not have any effect.
Apart from that I used the injector cleaner on my current filling and I am always using fuel with 95 octane.

@davidgz1: was it for exactly this sound?
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Old 11-14-14, 10:37 PM   #7
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Quote:
Originally Posted by Braincake View Post
I have seen posts about this, but I didn't find infos about if the TSB is valid in Europe.

It is true that my car didn't have a lot of highway miles lately though.
I tried to see if it worked to put the gear fixed in 3rd and drive with about 3000-4000 rpm for some time to blow the engine clean a bit. It seemed to not have any effect.
Apart from that I used the injector cleaner on my current filling and I am always using fuel with 95 octane.

@davidgz1: was it for exactly this sound?
It only makes the noise in cold starts

The warrenty guy put it in a computer and said to rebuilt the engine
At first the said it was carbon build up then the can heats and then they said to rebuild the engine
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Old 11-17-14, 03:05 AM   #8
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Quote:
Originally Posted by davidgz1 View Post
It only makes the noise in cold starts

The warrenty guy put it in a computer and said to rebuilt the engine
At first the said it was carbon build up then the can heats and then they said to rebuild the engine
That sounds typically like a dealer, haha :P

Today, the compression of my engine will be measured, so I hope that will give me an answer.
The sound seems to be there as well now when the engine is warm
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Old 11-17-14, 09:25 AM   #9
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Its been super cold here too.. In South Dakota the high is 11F (-11.6c) and tonight its supposed to be around -15windchill (-26c). So trust me it gets quite cold.... What youmight want to do. is load up on the cleaner and go for a 600 mile drive... I did that this summer to the Rapid City, where it is super hilly and mountains everywhere.. So it really ran my engine hard.. I used seafoam for the drive out there, then filled the tank, ran that out and then put in the lucas oil sstuff to help lubricate the top parts of the engine.. Car really did run great afterwards.. Put over 1500 miles on in 5 days.
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Old 11-24-14, 05:27 PM   #10
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Default ??

R u sayin im the dealer ?
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Old 11-25-14, 02:18 AM   #11
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Quote:
Originally Posted by davidgz1 View Post
R u sayin im the dealer ?
No, the reading out of the computer and then acting is typically how dealers solve problems.
Their mechanics are often not so skilled to do it without step-by-step guide according to some error codes read out from the car.

Anyway, my dealer is not really consequent about what they say.
Yesterday I got a statement that there is nothing wrong with my car and then 10 minuntes after that they asked if I could come by to show them the noise again.

So the dealer already said the following:
1. We don't hear anything
2. It's the high pressure fuel pump
3. The car is fine
4. Come by to show us the noise

I don't know what they are trying to do, but it is making me really angry at the moment.
They just should stand for the (premium!) brand and solve this problem.

I'll keep you guys posted.
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Old 12-10-14, 02:20 AM   #12
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So, for now, there seems to be no problem with the car.
I drove around with my mechanic and listened to an other IS250 and it seems like they all sound a bit raw/rough in winter days.

I filled it up with 100 octane fuel and some injector cleaner and I went to the Autobahn to blow the engine clean.
Hope it helps a bit.
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Old 12-10-14, 02:20 AM
 
 
 
 
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