Jump to content
SAU Community
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register


RB26 Rattle - Spun Bearing?

Recommended Posts

Hey guys,

My 33 GTR is making a weird rattling noise after driving it for a while. It tends to go away after you shut the car off and start it back up again, it sounds like something is loose and rattling around somewhere on the passenger side under the intake piping for the turbos. It doesn't get louder the more you rev the car, if anything it goes away. I'm going to drain the oil here shortly and have a look for any metal shavings.

Turbos are stock to my knowledge, they were going to get changed out this winter as well as the basic oil restrictor mods, etc..I just got the car with intention of doing a restoration over the next few years.

What are your thoughts? Is this going to need a rebuild right away?



Link to post
Share on other sites

Don't often get to say this about an rb, but that is definitely not a spun bearing.

It will be some thin gauge steel rattling against something else. Maybe a loose turbo heat shield, the air/water lines or some other random bracket not attached properly. Not a big deal but you should get it sorted so whatever isn't meant to be rattling doesn't break.

BTW I'm sure you're concerned....but 2 hours in the middle of the night was pretty early to bump the question!

Link to post
Share on other sites

Sorry about that, I was definitely nervous and anxious; I tend to get that way when something could be horrible. I figured it wasn't a bearing either because it doesn't get louder or worse the more I rev it. On cold start it doesn't happen (from what I can hear), i'm going to have a deep dive next weekend and see if I can find the issue.

Thanks for the reply Duncan!! I really appreciate it.

Link to post
Share on other sites

Yeah apart from the quite different tone, rod big end bearings (most common failure) are noisier when cold (thicker oil, higher clearances) and noiser when you rev it (rod moves faster, failed bearing lets it move more), and the speed of the knock increases with revs too. It is quite a distinctive "gnomes with hammers inside your engine" noise

  • Haha 1
Link to post
Share on other sites

Something is loose around the exhaust/turbo area. 100% not engine knock. Have a look and feel around (when cold obviously) for something loose. 

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...