weird sound on turbo when starting up
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Joined: Apr 2016
Posts: 135
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cls550
weird sound on turbo when starting up
has anybody notice the turbo sound when they start there car. my right side turbo makes a scraping/flapping noise right when i start it up. It sounds like it does not have enough oil and it scrapes or flapping. When the car is warmed up the sound goes away. I thought these were state of the art turbos? does my turbo have shaft play or something? i probably need more oil or an oil change. at 8k already. On cold starts it is a lot more noticeable then you can hear it change noise.
Last edited by TTMBCLS; Jun 24, 2017 at 03:11 AM.
Thread Starter
Member
Joined: Apr 2016
Posts: 135
Likes: 2
cls550
i think sometimes my wastegate doesnt close all the way and it makes those sounds. i try to put wd40 on where the outside of the wastegate flapper. after a week it still make the noise. my car drives fine and boost hits on the top end just fine. but when i start it up the noise comes and go.
Last edited by TTMBCLS; Jun 24, 2017 at 03:27 AM.
Member
Joined: Feb 2014
Posts: 94
Likes: 26
From: Houston, TX
2018 Lexus LC500, 2020 GLE350 4Matic, 2005 Jeep Wrangler
has anybody notice the turbo sound when they start there car. my right side turbo makes a scraping/flapping noise right when i start it up. It sounds like it does not have enough oil and it scrapes or flapping. When the car is warmed up the sound goes away. I thought these were state of the art turbos? does my turbo have shaft play or something? i probably need more oil or an oil change. at 8k already. On cold starts it is a lot more noticeable then you can hear it change noise.
Member
Joined: Jun 2017
Posts: 116
Likes: 12
2013 Mercedes CLS550 RWD
I have the same sound coming from my cls on cold start ups. Hear it for about 3-4 seconds and then goes away. Got it checked at the dealership and no faults were found. I guess its normal.
Last edited by Acidic Reflux; Jul 11, 2017 at 07:50 AM.
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Member
Joined: Jun 2017
Posts: 116
Likes: 12
2013 Mercedes CLS550 RWD
Bro it was exactly what pare5 mentioned. it was chain tensioners and valve problem. I got it fixed at the dealership. It seems like a common problem with M278 engines. My car is only 8000 miles driven and this problem occured. Its better to get it fixed before it stretches the chains which can cost a lot more.
