Disco Spring Sag

[Ralph1Malph]

Hi all,
After suggestions, help, advice here.
I had a noticeable sag of 3/4" - 1" on the RHS of the Disco.
Purchased some replacement rear springs (with 50mm lift) from a fellow AULRO member here in melb thinking that will fix it :roll:
Put them in this morning and hey presto, still a noticeable 1" sag but 50mm higher than before :cry:
Any suggestions? Visually, the lift springs are the same height, and in excellent nick anyway.
The standard springs which I took out are visually the same height also :roll:
As for extra weight on the RHS there is only a 30l sill petrol tank (approx 30kg full, and myself :roll:. Any suggestions what is causing my plight and how can i fix it? I cannot vouch for the shocks although they look and feel ok.
I know that springs for front suspension are usually LH and RH but I didn't think it mattered for the back. Just to be sure I put they one with the purple stripe on the LHS.
Regards
Ralph

[loanrangie]

In most cases you will need a taller spring in the driver side especially if you have an extra tank on that side.

[Ralph1Malph]

Thx, Hoped it wouldn't come to that :cry:
Ralph

[PhilipA]

You have a sill tank on the RHS. you would ahave to consider the weight of the tank also which would be about 20Kg.
Are the rear springs dual rate? If so the first bit is something like 160Lb (70KG) per inch, so if you have 50KG there you are talking 3/4 inch down.
Suggest that you put one of those rubber spacers which are standard on the front of a Disco on that side or buy a 1/2inch or more one for the RH spring. If they are already on the back, take the one out of the LH side.
Regard s Philip A

[tombraider]

Front Drivers spring should be longer to compensate...
In rear u can use up to 10-12mm spacer under spring to level the vehicle.

BTW 30L fuel tank = approx 30kg fuel + weight of tank (probably 30kg again)

Cheers
Mike

[seqfisho]

Make sure that the car is on level ground and measure all round with no weight ie; empty aux tank etc, then redo the measurements with full loads, it may be a front spring has sagged causing the opposite corner at the rear to sit up looking like the other rear has sagged, so it may be that your drivers front is the one that has a problem. 8O

Springs should also be handed eg LH and RH, that way they are slighty longer on Drivers side (RH) in Aus and (LH) in the US etc to compensate fro driver on one side constantly, dont know what happens when you have a passenger but thats the theory anyway :roll: https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/

[Ralph1Malph]

Thanks guys,
Will try out all the advice.
On the subject of front springs, the chap I bought the lift springs from, originally purchased them for the front of his 'Fender. 8O
This led me to thinking :roll:
Could I put the standard rear springs I just took out, into the front?
Now before I expose my ignorance :oops: I haven't looked or researched whether they are even the same diameter or thickness :arrow: was just thinking 8O
BTW is there an easy foolproof way to assess the front springs to ascertain if the drivers one is clagged :?:
Again thanks in advance.
Ralph

[tombraider]

Disco rears to front is fine! Common budget upgrade!

Measure the bumpstop clearance on each corner. Should give some indication.

Cheers
Mike

[Ralph1Malph]

Thanks Tombraider, will give it a whirl :wink:
Ralph

[seqfisho]

Thats exactly what I did, put my old rears in the front and new raised rears gave me 40mm lift with ARB winch bar and 60mm at rear



untill the drawers went in and they settled to 45mm at the rear :roll:

[PhilipA]

The way you tell if springs are sagged is to measure their free length. if as per spec then they are not sagged. The spec is on the Range Rover &Disco forum or http://members.shaw.ca/jbarge/springinfo.html

Re back springs to front. this is OK on a range Rover as the back springs are light because of the load leveller. in fact the "green" springs are 160 Lb and exactly those used by land Rover as front HD springs. BUT Disco springs are much heavier and dual rate (155/215 lbs per inch )as no load leveller, so I think your ride will be much stiffer.
Up to you.
LRA green springs give about 1inch lift and no probs with caster etc.
Regards Philip A

[Ralph1Malph]

Thanks for all the advice guys.
I ended up deciding to fit the std rear springs onto the front.
I started with the dvr side but when it came to the LHS, I couldn't get the lower shocky mount undone :cry:, turns out I in advertantly rounded the flats on the shocky post. :oops:
I got the sh*ts then and gave up till another day :roll: leaving the existing spring in.
Anyhow, as PhillipA said, the ride is a little stiffer on the RHS but she is now nice and level front and rear.
Although I am happy to leave it like this, something tells me I shouldn't :idea: . Gunna drive to Bendigo this w/e and see if I can detect any adverse rubber wear or tracking difficulty. If not I may just leave it like that until its time to change the shocks.
Any advice?

Thanks
Ralph