Your Best Source for Genuine Mazda Parts!
Your Best Source for Genuine Mazda Parts!
Results 1 to 5 of 5

Thread: 2015 Mazda6 Valvetrain noise

  1. #1
    Registered Member


    Join Date
    Apr 2010
    Posts
    5

    2015 Mazda6 Valvetrain noise

    I have noticed recently at 55K miles that my valvetrain has began to make more fluttering noises than it used to. Sometimes it even sounds like there is a bearing that is beginning to make noise (VVT actuator issues?) Anyone else havint similar issue or have had a similar issued that was repaired?

  2. #2
    BMW & Mazda Enthusiast

    2011 BMW 528i & 2015 Mazda 6

    Join Date
    Apr 2017
    Location
    Toronto
    Posts
    1,147
    Quote Originally Posted by alexseiji View Post
    I have noticed recently at 55K miles that my valvetrain has began to make more fluttering noises than it used to. Sometimes it even sounds like there is a bearing that is beginning to make noise (VVT actuator issues?) Anyone else havint similar issue or have had a similar issued that was repaired?
    two causes

    1. Valvetrain noise from thin oil. As the mileage increases, you want to start using thicker oil.

    Switch to a quality 5w30 or 40 oil like motul or shell rotella and the engine will quiet down

    2. Noise from carbon buildup on intake valves

    Are you experiencing an intake rumbling sound at low-rpm? At your mileage, Iím sure you have some carbon buildup. If you have the intake ports cleaned at a reputable shop then the engine will sound better, restore some performance and fuel economy. The best way to limit the amount of carbon buildup is by doing full throttle pulls about once a week and limiting the amount of city driving you do.

  3. #3
    Registered Member

    2014 Mazda 6 GT with MRCC

    Join Date
    Dec 2013
    Location
    Pennsylvania
    Posts
    133
    I actually noticed something similar and at 60,000 miles I did my oil change with an oil flush from Liqui Moly. Even though I run Mobil 1 and change it every 7500 miles since I did the oil flush the engine has been a lot quieter at idle. During the flush I listened to the engine all 10 minutes and heard a distinct clack get louder and then disappear like something was cleaned (it was surprising!) I think every 30-60k it's worth getting the little passages cleaned up just so the oil can flow to everything properly. I would consider that or as mentioned a thicker oil, but stay in grade and consider a high mileage oil like Valvoline Maxlife Synpower to see if the noise gets better or worse. A lot of the tick you hear is actually the fuel injectors spraying at high psi too.

    2014 Mazda6 Grand Touring with MRCC - Soul Red with Almond Interior

  4. #4
    BMW & Mazda Enthusiast

    2011 BMW 528i & 2015 Mazda 6

    Join Date
    Apr 2017
    Location
    Toronto
    Posts
    1,147
    Quote Originally Posted by eyedocorlando View Post
    I actually noticed something similar and at 60,000 miles I did my oil change with an oil flush from Liqui Moly. Even though I run Mobil 1 and change it every 7500 miles since I did the oil flush the engine has been a lot quieter at idle. During the flush I listened to the engine all 10 minutes and heard a distinct clack get louder and then disappear like something was cleaned (it was surprising!) I think every 30-60k it's worth getting the little passages cleaned up just so the oil can flow to everything properly. I would consider that or as mentioned a thicker oil, but stay in grade and consider a high mileage oil like Valvoline Maxlife Synpower to see if the noise gets better or worse. A lot of the tick you hear is actually the fuel injectors spraying at high psi too.
    - Correct, most of the sound you hear is in fact the injectors, but the engine will sound quieter and more smooth with a good quality thicker oil.

    - I recommend changing the oil every 5000 miles if you do city driving, this way you wonít need to clean out the passages very often.

    - every occasional oil change, try using some shell rotella 5w40. Itís not only a very high quality yet cheap oil, but it has detergents which will help keep your motor nice and clean.

    - in Australia, the owners manual specified anywhere between 5w40 - 10w50 so donít be scared to use slightly thicker oil if you live in a hot climate or drive aggressively

    -you said that you were listening to the idle for 10 minutes? The less you idle the better for your Engine. Itís always best to just get in and start driving right away.

    - liqui moly is a good oil, but if you want the best toughest oil for your car I recommend motul. Very, very good oil. I suggest you also avoid Mobil 1.

  5. #5
    Registered Member

    2014 Mazda 6 GT with MRCC

    Join Date
    Dec 2013
    Location
    Pennsylvania
    Posts
    133
    Quote Originally Posted by GJ-Molestor View Post
    - Correct, most of the sound you hear is in fact the injectors, but the engine will sound quieter and more smooth with a good quality thicker oil.

    - I recommend changing the oil every 5000 miles if you do city driving, this way you wonít need to clean out the passages very often.
    - every occasional oil change, try using some shell rotella 5w40. Itís not only a very high quality yet cheap oil, but it has detergents which will help keep your motor nice and clean.
    - in Australia, the owners manual specified anywhere between 5w40 - 10w50 so donít be scared to use slightly thicker oil if you live in a hot climate or drive aggressively
    -you said that you were listening to the idle for 10 minutes? The less you idle the better for your Engine. Itís always best to just get in and start driving right away.
    - liqui moly is a good oil, but if you want the best toughest oil for your car I recommend motul. Very, very good oil. I suggest you also avoid Mobil 1.
    I think you misunderstood my post. I used this product: https://www.amazon.com/Liqui-Moly-20.../dp/B00CR3RXTO

    Secondly I was answering his question. I am satisfied with how my engine sounds and performs on Mobil 1 0W-20 including oil analysis. I've been on BITOG since 2002. I might change in the future, but it won't be a change of grade for my application and driving style. You might want to answer OPs post - I again have no concerns.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

Similar Threads

  1. RECALL!!! Mazda6 2015
    By aussiemano9 in forum Mazda6 Wheels, Tires, Brakes & Suspension
    Replies: 0
    Last Post: 08-29-2017, 07:44 AM
  2. My 2015 Mazda6
    By JITB in forum Pics & Builds
    Replies: 14
    Last Post: 09-21-2015, 02:17 AM
  3. My 2015 Mazda6 GT is CorkSported out =)
    By SRH_3GT in forum CorkSport
    Replies: 2
    Last Post: 06-10-2015, 06:30 AM
  4. 2015 Mazda6 GT - new owner
    By Falcon73 in forum Mazda6 Lounge
    Replies: 7
    Last Post: 09-13-2014, 02:53 AM
  5. Valvetrain noise... normal?
    By CSVT#49 in forum Mazda3 Engine & Transmission
    Replies: 3
    Last Post: 12-18-2008, 10:43 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •