Jump to content
SAU Community

100K Service...now I Have A Strange Sound... Please Help

rofocale

By rofocale,
in General Maintenance

 Share

Recommended Posts

rofocale Contributor

rofocale

Posted
Posted

Hi Folks,

Over the weekend, Dad and I did the 100K service on my R33 GTR. This entailed replacing the water pump (with a N1 pump), the seals on the cams, the idler and tensioner bearings and timing belt.(We didn't do the crank seal as I have an upgraded oil pump to put on before long.) The work went well, with much patience and the engine manual at hand.

The car started up well and sounds just right...for about 2 minutes, then a what I can only describe as a whiring sound starts and continues. We have really only let the car idle until we are completely happy with all our work. Other than this sound, the car is running well. This behaviour is also repeatable. When we stop the car and restart it, it runs well for about another 2 minutes and then the whiring sound starts up again.

We haven't taken the cam and timing belt covers off yet, which is our next step this coming weekend. We had a little peek in the top of the cam cover and at first glance the timing belt looks okay(just a that spot, we didn't spin it round).

We used nissan OEM parts for the idler, tensioner, cam seals and water pump and the timing belt is a gates racing belt.

What I'm wondering is if anyone can offer any advice as to what might be causing this. My personal ideas are either the tension on the timing belt is not right, or that either the tensioner or idler bearing is not good. Can anyone offer any advice as to what this might be, or alternatively what it is not?

Thanks in advance,

murray

89CAL Grand Master

89CAL

Posted
Posted

The gates racing belts are pretty well known to be louder then the standard/some other timing belts. I have a Dayco timing belt and it hasnt made a noise since I put it in, but i know alot of people with the gates belts experience the whirring noise

I dont think its a serious issue, just a bit of noise, and after the belt wears in a bit it goes away

From what I know about it anyway, its fairly well documented on this site, just search timing belt noise or gates timing belt, something along those lines

rofocale Contributor

rofocale

Posted
  • Author
Posted

Thanks to everybody for their advice - I really appreciate it.

After hearing your responses, Dad and I took the front covers off again and went through the tensioning procedure again and gave the new tensioner and idler an inspection. Everything looked good. With it all in place I gave the crank several rotations, watching the timing belt for lateral travel or anything unusual. Everything looked good so we put it all back together and started the car up. This time the noise was much less. Again it seemed to 'start up' after a minute or two after starting the engine, but the noise was nothing like as loud - it was down to a similar volume as many other regular sounds in the engine area, if it a little less. So considering the advice and experiences of everybody we just kept it idling for a while and then decided to go for a drive as the noise sounded just so much less of problem than after our initial turn on. The volume of the noise when I started this post/topic was really much louder than anything else in the engine area and sounded as something was pretty wrong. Now you would almost just say, that the noise is just how the engine sounds.

Thanks again

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

    • DatsunBanana
      Rear subframe stay bracket bolt removal issues

      By DatsunBanana 路 Posted

      Thanks both. All good advice. Reminds me of drilling through stone wall for drainage pipe 馃槵 I'll let you know how I get on if I still have use of my hands afterwards 馃槄
    • The Bogan
      NC MX5

      By The Bogan 路 Posted

      Finally got shipping number for the intake and throttle body, shipped by UPS, so "should" be in my hands sometime next week, fingers fracking crossed
    • GTSBoy
      [HOW-TO] Winter Steam-Clean & Odour Removal in 30 min

      By GTSBoy 路 Posted

      I'm so far behind in the jobs I have to do at both work and home (including car) that I have become immortal. There's simply no way that I can die now.
    • The Bogan
      [HOW-TO] Winter Steam-Clean & Odour Removal in 30 min

      By The Bogan 路 Posted

      Each to their own I guess  Me, I put just as much time into cleaning inside of the cars as I do on the outside As for getting wet, it is really no different than steam cleaning the carpets at home, apart from the cars carpet dries alot faster than the house, again, I only do it in the hotter months and leave the car opened up for a few hours As I only do it yearly, it is just before I do the diff and gearbox service, so I clean the carpets, then it's up on stands, wheels off, service, clean the undercarriage,  grease the bushings and do a nut and bolt check on everything  Disclaimer: I typically had all the time in the world to kill when I was working 馃ぃ, so spending a full day or 2 cleaning, serving and "looking at stuff" was,  easily achievable, and a fun mental therapy day As for time to kill, I retired last Wednesday, so apart from my physical training, my days are filled with lots of random jobs around the house and garden...."Idle hands are the Devils something something" I am also buying a new house sooner rather than later, I'm actually looking at a potential property tomorrow, I'm looking forward to getting a car hoist as I'm starting to get to old to crawl around under a car, I can only imagine all the undercarriage cleaning and looking at stuff when that gets set up
    • GTSBoy
      [HOW-TO] Winter Steam-Clean & Odour Removal in 30 min

      By GTSBoy 路 Posted

      Yeah, I'm not interested in wetting the carpets, and I don't care about brown dirt/dust that lives deep in the pile or underneath. It's not like I crawl around on them in my birthday suit or eat dropped food off them (because there is never any open food in my car). The seats are alcantara (cheap Chinese imitation alcantara, to be sure!) with barely 1" of foam pad behind the surface. That's not getting wet either. Any car that I would be happy to get the interior wet, I would not care to put the effort into.
脳
脳
  • Create New...