Speedo

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Roge1
Posts: 73
Joined: 10 Mar 2011 10:51 pm

Speedo

Post by Roge1 » 01 Aug 2013 08:28 am

Morning all,

Having recently fitted 15in vesa alloys to my 340 I have noticed the speedo is now erratic up to circa 60mph (was warned this might happen), and that the milometer has stopped working altogether. Is there a simple fix for this?

Many thanks

Roge1 :?

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SteveP
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Joined: 21 Sep 2004 12:45 pm
Location: Coventry, UK

Re: Speedo

Post by SteveP » 01 Aug 2013 11:21 am

I think it's probably a coincidence that fitting new wheels has done this, unless youve disturbed the speedo drive in the end of the passenger front wheel hub or something. What size tyres do you have? Because of the lower profile with larger 15" wheels the actual rolling diameter shouldn't make too much of a difference really
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

Roge1
Posts: 73
Joined: 10 Mar 2011 10:51 pm

Re: Speedo

Post by Roge1 » 01 Aug 2013 11:59 am

Steve,

Due to suspension rubbing, I have ended up with 175 55s on the front and 195 55s on the rear. I will take a look at the drive in the front pass wheel hub, just in case I wasn't as careful when the wheels were replaced as I hoped I was!?

Thanks

Roge1 :oops:

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SteveP
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Re: Speedo

Post by SteveP » 01 Aug 2013 01:49 pm

Them tyre sizes wont be helping accuracy, I'm afraid - the correct size to get the closest rolling diameter on Vesa's would be 185/55/15 or 195/50/15, I'd go for the latter as its a much more common size
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

Ride_on
Posts: 2232
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Speedo

Post by Ride_on » 02 Aug 2013 06:49 pm

Tyre/wheel size will only make a difference to your speedo accuracy, unless someone has removed parts of the speedo cable end point in order to fit the wheels. Do they have a solid centre, ie no small cap that covers the centre? It could be pressing on the speedo cable end point and pushing it back into the hub.

If 'someone' warned you that might happen, they knew the wheels would damage your car.

Some cars with ABS do have an issue with some LP wheels/different sizes, but that is rather different to a simple mechanical speedo drive.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

morgan105
Posts: 282
Joined: 30 Dec 2004 07:34 pm
Location: Wirral, UK

Re: Speedo

Post by morgan105 » 02 Aug 2013 11:05 pm

The little clip that holds the cable in the end cap may be deformed or missing allowing the cable to move further in. Happened the other week on my sisters car, the clip was deformed making it to wide to hold the cable properly.

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