Granvia: noise seemingly from floor between front seats?

About the Granvia or about whatever....
Legacoid
Posts: 3
Joined: 29 Jan 2016, 17:19

Granvia: noise seemingly from floor between front seats?

Postby Legacoid » 24 Feb 2018, 18:50

We just noticed an abnormal noise in our 3L diesel two-wheel drive Granvia van, and wondered if anyone could offer ideas about what it could be.

It can best be described as a cross between whooshing air (as from a fan, or an open window at speed) and normal road noise, but:

- it is most apparent at very low speeds (3-10 mph) and becomes less and less noticeable as speed increases - perhaps it gets drowned out by genuine road noise. The noise is still present when coasting in neutral, but gone when stationary or reversing.

- listening carefully inside the van, it seems to come from the floor between the two front seats (above driveshaft?)

- the noise is undetectable from outside the van. I've walked along beside it and heard nothing but tyres and normal diesel engine tickover, while the driver can hear it plainly inside the van.

- The noise presented quite suddenly, in that we drove a few miles into town hearing nothing, parked up for a few minutes, then heard it as we drove away.

- There's no unusual vibration that I can detect, and nothing attached to the underside of the vehicle that's dragging on the ground (my first thought).

So, any ideas? On the one hand I'm thinking maybe we should take it to a garage and get it checked out, but on the other hand I'm not convinced it's loud enough at present for someone who doesn't know what the vehicle normally sounds like to notice it. Then again, if it's something that could be a cheap fix if caught early, maybe now is the time?

Any thoughts much appreciated!

jarmmo
Posts: 67
Joined: 30 Apr 2011, 06:43

Re: Granvia: noise seemingly from floor between front seats?

Postby jarmmo » 26 Feb 2018, 08:23

Hi Legacoid
This noise could be the prop shaft centre bearing but that is located further back around the second row of seats, below the front seats you are looking at g/box or transfer box if 4wd. Sound travels through a car so can sometimes be difficult to pin point but centre bearing is a good place to start as it is the cheapest option. I would put the car on axle stands and spin the wheels to see if you can hear anything amiss. DO NOT GO UNDER THE VEHICLE SUPPORTED BY JACKS ALONE.
Regards
Jarmmo
Last edited by jarmmo on 26 Feb 2018, 12:41, edited 1 time in total.

Legacoid
Posts: 3
Joined: 29 Jan 2016, 17:19

Re: Granvia: noise seemingly from floor between front seats?

Postby Legacoid » 26 Feb 2018, 11:46

Many thanks jarmmo - I'll do as you say and just see if I can spot anything.

Legacoid
Posts: 3
Joined: 29 Jan 2016, 17:19

Re: Granvia: noise seemingly from floor between front seats?

Postby Legacoid » 20 Mar 2018, 19:18

Turned out it was a worn centre propshaft bearing. I'd decided it was better to get it fixed, but this was way above my experience level so I had the garage do it. Cost about £200, but the noise is gone.

jarmmo
Posts: 67
Joined: 30 Apr 2011, 06:43

Re: Granvia: noise seemingly from floor between front seats?

Postby jarmmo » 20 Mar 2018, 21:07

Magic, at least it is fixed now.
Regards
Jarmmo.

MrDillon
Posts: 204
Joined: 30 Nov 2008, 20:45

Re: Granvia: noise seemingly from floor between front seats?

Postby MrDillon » 30 Mar 2018, 17:33

I have had a similar noise for some time, but was in denial! Until Legacoid's stellar description, and subsequent diagnosis and fix, meant I could no longer ignore it.

I found this thread from David invaluable for DIY instructions
http://www.toyota-granvia.co.uk/viewtopic.php?f=7&t=1458&p=6015&hilit=propshaft+bearing#p6015

New bearing was £26 or so on e bay, and job took a couple of hours despite the obligatory heavy rain shower halfway through.

So the noise has gone, but also transmission shifts are noticeably smoother especially engaging from rest, and the little judder when going on and off throttle at low speeds (always done that in the 10 years we've owned it) has also disappeared.

All in all a fine result - thanks to all
MrD


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