Jump to content
SAU Community

Is My Timing Belt On The Way Out?

brodie_84

By brodie_84,
in General Maintenance

 Share

Recommended Posts

brodie_84 Contributor

brodie_84

Posted
Posted

I just picked up an R33 gtst s2. It needed a new diff and radiator so I've just finished replacing those and today I just noticed a slight whirring noise, which I think is coming from the timing belt cover.

Has anyone had this noise before? It only does it just off idle then it's fine after that. I've already ordered a new timing kit and water pump today which I'll fit on Friday, and hopefully that fixes it.

The motor has done just over 100,000kms so I'm gonna play it safe and replace the belts and pulley, and water pump while I'm at it.

Link to comment
https://www.sau.com.au/forums/topic/325911-is-my-timing-belt-on-the-way-out/
Share on other sites
Kinks Grand Master

Kinks

Posted
Posted

100k service = change timing belt. you're due so change it, interference motor means things get ugly if it snaps.

aftermarket belts eg gates make some noise anyway, but if yours hasn't been done and it's the OEM belt then it could be a warning sign that you should change it!!

i never heard a peep out of my OEM belt, got a gates on there now and it does make a slight whirr just off idle but they often do that.

brodie_84 Contributor

brodie_84

Posted
  • Author
Posted

Yea I'm prayin it's only the timing belt. I bought the car off a mate and he was straight up with the few things that were wrong with it and he did mention the timing belt hasn't been done yet. The motor sounds perfectly smooth, only the slight whirr just off idle. My parts should get here Thursday, so I should have it all completed by Friday arvy. I'm massively keen to get it on the road but don wanna playin Russian roulette n end up blowin the motor by drivin it with the old belt.

Andy R33 GTS Apprentice

Andy R33 GTS

Posted
Posted

Hey guys, I am having the same issue ....HOWEVER,

my 96 R33 GTST (100km covered), was due for a timing belt, especially as I only just got the car a few months ago and didn't know if its been done.

I bought a timing kit, had it fitted, and within 2 weeks I am getting a whirr/growl from top of timing cover,

the noise only happens a few hundred RPM over idle and goes when revved higher, I have noticed that the growl goes once its warm (after a few mins) but have also notice when quite hot... I am getting a high pitched groan/moan from the same area.

Is the idler bearing shot? or tensioner? or is it just a noisy belt?

My other concern is that the tensioner has been set too tight and its worn the bearings ... is this possible?

Note, The noise wasn't there before the timing belt was done. :down:

Muchly appreciated if anyone else can shed some light?

Andy

Andy R33 GTS Apprentice

Andy R33 GTS

Posted
Posted
New belts usually do that before theyre settled in, If it's a Gates timing belt, completely normal, might need retensioning down the track if it still does it

So a little growl just above idle for a few minutes is normal?

will it quieten down with age? Is this the same for the hum/whine when it is warm?

Thanks

brodie_84 Contributor

brodie_84

Posted
  • Author
Posted

so, i changed the timing belt yesterday and changed the tensioner and idler pulley while i was at it. The water pump was weeping out of the 'tell tale' hole so i replaced it as well.

It would have been approximately a 4 hour job, but my mate that was helping me accidently snapped off one of the 6mm bolts that holds the top timing cover on. Then it turned into a big mission to find a small enough ezi-out kit in town. And in the end I ended up drilling out the bolt and tapping it to an 8x1.25 hole instead and now its all sweet.

Anyways, now the new belt is fitted, the whirring noise that was there before, is now completely gone :-)

There is now the higher pitched whining/whirring noise... which is obviously characteristic of a new timing belt until it runs in.

But other than that, everything looks fine.

  • 4 weeks later...

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • weikleenget
      R32 GTR clutch master cylinder adapters

      By weikleenget · Posted

      What could be causing my clutch problem besides a bad master or slave then? Both those parts are new 
    • The Bogan
      MLR's Bogan cruise ship

      By The Bogan · Posted

      Just came across this, but in QLD I start leave again in 2 weeks, if it is still available I might drive up and check it out Unless, @MBS206 do you live near here????, if so I could hit you up with a finders fee https://www.gumtree.com.au/s-ad/hope-island/auto-body-parts/nc-mx5-factory-hard-top/1328976391
    • The Bogan
      MLR's Bogan cruise ship

      By The Bogan · Posted

      My hold point for future mods is that I want a OEM detachable hard top first, but, finding one is a pain, MX5 Mania are looking for one for me, but, as hens teeth are more common, finding one in Australia is proving problematic  I can get a OEM one from overseas, hell, you can still get new ones in 'Merica, but, shipping is a absolute killer and I cannot justify the cost, or the risk of it being damaged during transport As for the aftermarket hardtops, whilst they do the job of being a hard top, and are fine for a track car, they don't seal well (read: leak like a sieve in the rain), and you need a plastic/poly rear window, plus they are a bolt in option only and not made to be easily removed I liked how the hard top on my NB could be fitted, and removed, by myself, in less than 5 minutes I know it sounds bad, but I'm waiting for someone to write off a car with one so I can swoop in on their pain, it will go to a good home though, so my guilt of this is tempered
    • r32-25t
      R32 GTR clutch master cylinder adapters

      By r32-25t · Posted

      I’ve got one on mine and it’s fine, 
    • GTSBoy
      R32 GTR clutch master cylinder adapters

      By GTSBoy · Posted

      No, you don't want to plug the vacuum line, as that will turn that side of the booster into an air spring and probably make it feel worse. I'm not saying that the GTR master itself doesn't need a booster. I haven't paid attention to the GTR one to know what size it is cf the non-GTR ones. But when you think about it - they have to do the same job, which is to move a little slave piston a few mm to do what it is supposed to do, and that final action is the same on all the cars. So, it is very unlikely that the GTR MC is any different than the others, because it has the same pedal stroke and the same output requirement. The booster just makes it feel easier. I'd suggest you probably have an actual hydraulic problem. It's totally common on these old shitboxes.
×
×
  • Create New...