MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Rholtby on September 04, 2018, 06:39:52 pm

Title: Humming whistle from rear of car
Post by: Rholtby on September 04, 2018, 06:39:52 pm

Evening all, I'm hoping someone here can help. The other night whilst travelling back around the M25 I could hear a humming & whistle coming from the rear, a similar sort of noise to carrying ladder on a roof rack. The car also feels as though it's not pulling away as strong.

Could this be rear pads not releasing properly or is it more likely to be barings? I say pads as occasionaly I get a check brake pad warning I thought faulty sensor, new pads and discs less than 6 months ago which took the garage 2 days as they couldn't remove the part that the caliper attaches too.

I have since gone on a short drive a d found the brake discs to be extremely hot, is this likely to be a seized caliper as I've I'd this suggested to me?

Any advice would be great.

Thanks

Title: Humming whistle from rear of car
Post by: Dogma on September 05, 2018, 09:31:50 am

Sounds like the calipers to me

Title: Re: Humming whistle from rear of car
Post by: Rholtby on September 08, 2018, 10:32:14 am

Thanks. I've got 2 new calipers so going to give it a go

Title: Re: Humming whistle from rear of car
Post by: Dogma on September 08, 2018, 02:28:55 pm

Quote from: Rholtby on September 08, 2018, 10:32:14 am

Thanks. I've got 2 new calipers so going to give it a go

gl

Title: Re: Humming whistle from rear of car
Post by: Rholtby on September 14, 2018, 05:45:19 pm

So I've changed the calipers and bled the system. The brakes don't seem as harsh as before, must need bleeding again, but they do work. Now the handbrake is non existent so that needs adjusting. BUT most annoyingly the humming/whirring is still there  :sad: I think once the problem is solved its going to be time to move on from it

Title: Re: Humming whistle from rear of car
Post by: pudding on September 14, 2018, 11:15:44 pm

Wheel bearing probably.  Jack the rear up with handbrake off and spin the wheels. You will hear the dodgy one.  Not worth shifting the car on for such a minor thing that ALL cars suffer from!

Title: Re: Humming whistle from rear of car
Post by: MIJ_JAGGER on September 14, 2018, 11:46:19 pm

+1 for wheel bearing
Had the humming on mine little while back, changed both rear and all good now

Title: Re: Humming whistle from rear of car
Post by: Rholtby on September 15, 2018, 12:06:35 pm

Quote from: Pudding on September 14, 2018, 11:15:44 pm

Wheel bearing probably.  Jack the rear up with handbrake off and spin the wheels. You will hear the dodgy one.  Not worth shifting the car on for such a minor thing that ALL cars suffer from!

Thanks. That was my original thought. Seems I've wasted time and money on the brakes now. The car just seems to be costing all the time. Are the bearings easy enough to change?

Title: Re: Humming whistle from rear of car
Post by: pudding on September 15, 2018, 12:23:10 pm

Quote from: Rholtby on September 15, 2018, 12:06:35 pm

Quote from: Pudding on September 14, 2018, 11:15:44 pm

Wheel bearing probably.  Jack the rear up with handbrake off and spin the wheels. You will hear the dodgy one.  Not worth shifting the car on for such a minor thing that ALL cars suffer from!

Thanks. That was my original thought. Seems I've wasted time and money on the brakes now. The car just seems to be costing all the time. Are the bearings easy enough to change?

Nature of the beast I'm afraid mate, and all other performance German cars.  You will get the occasional big spend on them but the rewards are worth it imo.

The rear brakes seize up anyway, so that wasn't wasted money.  Treat it as preventative maintenance  :happy2:

Yes they are very easy to change if you have the right tools.  The rear bearing/hub assembly is about £140 from VW, per side.  You can get much cheaper alternatives from Eurocarparts though, which is probably advisable if you're thinking of selling the car.

Title: Re: Humming whistle from rear of car
Post by: Octoparrot on September 15, 2018, 10:01:41 pm

Look on YouTube for HumbleMechanic, he's just done a video on changing the rear bearings on a mk5 GTI.

Title: Re: Humming whistle from rear of car
Post by: pudding on September 21, 2018, 03:41:29 pm

Yeah the Humble one has some great MK5 guides, especially the door module replacement - very detailed.

For the rear brakes, the best tool I can recommend is a stubby spline set to get the carrier bolts out - https://www.amazon.co.uk/Stubby-Impact-Triple-Tamperproof-Sockets/dp/B074QQHC37/ref=sr_1_28?s=diy&ie=UTF8&qid=1537540816&sr=1-28&keywords=spline+socket+set