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[Enceladus]

One of the ebay sellers compatibility list says the Kilen 60037 are for cars with self levelling. That seems to be bull.

Don't rely on ebay, or the sellers. It's best to directly check the manufacturers application lists.

For a 2.6 saloon without self levelling Kilen lists three possibilities.
71026 = Coil spring with constant wire diameter = GM 90487520
260640 = Coil spring with inconstant wire diameter = GM 90487520
60037 = Coil spring with constant wire diameter; Reinforced Version = GM # not stated

So the 60037 springs will fit, just they are reinforced which presumably means heavy duty.
My guess is that the 260640 inconstant spring is a standard duty but improved version of the 71026 standard constant wire spring.

Hi Doctor Gollum

Thank you for the link to the pair of springs. I contacted the company to purchase them. They asked for my Reg No. And are now saying that they will not fit my car. It is standard setup not self levelling. I will believe the members advise on here more than their's. If I purchase the pair in your link (Kilen Code 60037), will they fit with no problems?

https://www.ebay.co.uk/itm/2x-60037-KILEN-REAR-COIL-SPRING-SUSPENSION-PAIR-OE-QUALITY-/283760156449

Sorry for asking.

Thanks for all the help. Take care
Addy

[Doctor Gollum]

Heavy duty is kinda the point. Standard Elite springs are soft, even more so after 17-20 years of abuse.

Heavy duty with self levelling is a factory spec, usually fitted to UK Police vehicles, (self levelling less so on Police saloons) but never the less, they do the job most satisfactorily without affecting ride comfort/quality

[Jan Suhr]

Springs for self levelling are softer as the shocks are designed to carry some of the weight.

[Doctor Gollum]

Springs for self levelling are softer as the shocks are designed to carry some of the weight.

Worth bearing in mind that the shocks are essentially irreplaceable so standard shocks will be fitted at some point, and the combination of soft springs and standard shocks will be borderline dangerous

[Migv6 le Frog Fan]

Whereas self levelling shocks with springs stiffer than elite spec improve the car enough to make you wonder what they were thinking when they decide to fit those really soft springs.

[Nick W]

Whereas self levelling shocks with springs stiffer than elite spec improve the car enough to make you wonder what they were thinking when they decide to fit those really soft springs.

Exactly.

[Enceladus]

The discussion is about whether the 60037 Kilen rear springs are suitable.

In this case the car, which is a 2.6 saloon, does not have self-levelling? Did it ever?

The ebay seller says they don't fit the OP's car. The Kilen website says they do. With the caveat 'reinforced' and not for self-levelling. So presumably heavy duty.

Kilen list another constant rate spring for a 2.6 saloon without self-levelling. This I assume is the standard duty drop-in
.
Kilen also list an inconstant version of that spring.

[Doctor Gollum]

All Elites have self levelling as factory standard.

As for the constant query regarding the recommended Kilen 60037... your muddying the waters and overcomplicating this.

The original question was "Recommendations for the best coil springs for a 2.6 saloon.", to which the answer remains Kilen HD, which, for the saloon means 60037 for all the corroborated reasons outlined repeatedly above.

All the referencing to original springs is fundamentally irrelevant as the original springs are no longer available

[Enceladus]

The OPs profile suggests the car is a 2.6 CD, not an Elite.

[Doctor Gollum]

The OPs profile suggests the car is a 2.6 CD, not an Elite.

Doesn't matter.

[jb]

The HD spec with raise the rear ride height  v std.

[Doctor Gollum]

The HD spec with raise the rear ride height  v std.

Nope, not in my experience.

Obviously it will correct the ride height of 17+ year old springs, but it should end up with the arch height being 'as new' allowing for slight variations in individual springs 

[Nick W]

The HD spec with raise the rear ride height  v std.

If the S/L is working properly, then it is setting the ride height. Changing the spring doesn't affect that, even if it's overdue. What does happen is that the S/L won't need to work as often or as hard. After fitting stock rear springs to my Elite, the compressor was rarely needed in normal use. The car both handled and rode better, as the additional air spring is a bit of a bodge. New front springs instead of saggy 17 year old, 180k miles, ones raised the front of the car 30mm to stock height


Having stock springs also means that when the GM shocks fail, you can fit ordinary ones.