colour code of springs for the 75 - Page 2

hinged_bap · 6th June 2013, 07:59

Quote:

Originally Posted by norfie

Just a quick guide into spring colour codes:
Green / any other colour = saloon (R40)
Purple / any other colour = estate (R41)
Brown / any other colour = MG (saloon and estate)
(early cars will have a single colour (pre estate and MG) so use Green / (your colour) for replacements)
Front dampers:
RND 105321 / 331 = R40 (K1.8)
RND 105340 / 350 = R40 (KV6)
RND 105360 / 370 = R40 (M47 diesel)
RNB 000400 / 410 = R41 (petrol and diesel)

this is very confusing.
the seller in my ebay link of post #6 has purple brown, would they be ok for a 2001 75 diesel that previoulsy had green/grey fitted.?

even though the sizes quoted for green/grey and purple.brown in post 6 are different, will they still fit ?.

bartandrose · 6th June 2013, 11:53

I think that they can all physically fit.
The wider gauge springs mean a stiffer spring (higher spring rate) and as such will be shorter in overall length for a similar ride height to the longer and thinner gauge spring.

The R41 estate is not much heavier than the saloon, but I suppose has differently specified springs for (possibly) heavier load conditions.

But, I agree, it's all very confusing.

norfie · 6th June 2013, 12:13

Yes the springs will physically fit (all the damper bodies are the same).
Green/Grey spring has a fitted load of 4224N, spring rate of 19.3 N/mm
Purple/Brown spring has a fitted load of 4282N, spring rate 23.5 N/mm
All R75s have the same ride height (hence all these different springs) so the effect of fitting the Purple/Brown will raise the ride height on the front of your car and you will lose a small amount of ride comfort due to the increased spring rate.

norfie · 6th June 2013, 12:30

Quote:

Originally Posted by bartandrose

it's all very confusing.

On the saloon there are 3 springs for the K1.8, 5 for the KV6 and 3 for the diesel. The 5 springs for the KV6 are made up of 3 from the diesel and 2 from the K1.8
On the estate there are 4 springs: 1 for the KV6, 1 for the diesel and 2 for the K1.8 (with no cross-overs)

aReallyNiceCar · 16th January 2020, 19:18

Thanks for all the useful information.....
Helped me make an informed decision, before buying.
Cheers folks.!

6th June 2013, 11:53	#12
bartandrose Loves to post Rover 75 CDTi Contemporary SE Join Date: Feb 2010 Location: Southampton Posts: 333 Thanks: 1 Thanked 3 Times in 2 Posts	I think that they can all physically fit. The wider gauge springs mean a stiffer spring (higher spring rate) and as such will be shorter in overall length for a similar ride height to the longer and thinner gauge spring. The R41 estate is not much heavier than the saloon, but I suppose has differently specified springs for (possibly) heavier load conditions. But, I agree, it's all very confusing. Last edited by bartandrose; 7th June 2013 at 08:05.. Reason: spelling

16th January 2020, 19:18	#15
aReallyNiceCar Regular poster Rover 75 Tourer, Connoisseur SE. Vintage Peugeot 106 XND, Sick & ill Vauxhall Astra 1.7CDi Estate Join Date: Feb 2016 Location: Sunny Manchester Posts: 45 Thanks: 4 Thanked 16 Times in 11 Posts	Broken Front spring. Thanks for all the useful information..... Helped me make an informed decision, before buying. Cheers folks.!

6th June 2013, 12:13	#13
norfie Avid contributor Rover 75 1.8T saloon Join Date: Nov 2011 Location: Dunstable Posts: 206 Thanks: 0 Thanked 8 Times in 6 Posts	Yes the springs will physically fit (all the damper bodies are the same). Green/Grey spring has a fitted load of 4224N, spring rate of 19.3 N/mm Purple/Brown spring has a fitted load of 4282N, spring rate 23.5 N/mm All R75s have the same ride height (hence all these different springs) so the effect of fitting the Purple/Brown will raise the ride height on the front of your car and you will lose a small amount of ride comfort due to the increased spring rate.