Fitting Radius Arms

PhilM · Post by **PhilM** » Sun Jan 10, 2016 9:18 pm

I have been restoring my S1 4.2 1965 OTS for 14 months now and am now in the stages of building up and as you can imagine as a newbie to restoration, there are a few teething troubles.

The first is getting the Radius arms to fit to the cones. They are about 1/4 inch too short on both sides, can anyone help guide me in how to overcome the issue please.

Alty Ian · Post by **Alty Ian** » Sun Jan 10, 2016 9:20 pm

Hi You will need to slacken off all your IRS bolts first enough to allow you to lever the IRS forward and allow the radius arms to go over their cups and bolt them on. Then just tighten up all the IRS mounting bolts.

Simonpfhc · Post by **Simonpfhc** » Sun Jan 10, 2016 9:57 pm

I had the exact same issue when I went to fit mine just a couple of weeks ago. What I did was load up the rear suspension by adding a weight. This will raise the wishbone and bring the trailings arms closer to the mounting cups. I smeared anti-seize grease liberally and then used a trolly jack with a block of wood and jacked the trailing arm mounts up onto the cups.

They went straight on ;-)

Good luck.

Cheers.

PhilM · Post by **PhilM** » Sun Jan 10, 2016 9:59 pm

Thanks for the fast reply Ian,

I will give it another go and see if I can get closer, I'll let you know how I get on.

PhilM · Post by **PhilM** » Sun Jan 10, 2016 10:02 pm

I will also try that Simon, how much weight did you use.

abowie · Post by **abowie** » Mon Jan 11, 2016 7:33 am

Just put a pair of jack stands under the splines and lower the car down onto them.

Once the IRS takes some weight you will be able to get the cups on. There is no need to undo any of the IRS mounting bolts.

Never-seize is your friend. Don't forget to lock wire the bolts.

andrewh · Post by **andrewh** » Mon Jan 11, 2016 7:33 am

Simonpfhc wrote:I had the exact same issue when I went to fit mine just a couple of weeks ago. What I did was load up the rear suspension by adding a weight. This will raise the wishbone and bring the trailings arms closer to the mounting cups. I smeared anti-seize grease liberally and then used a trolly jack with a block of wood and jacked the trailing arm mounts up onto the cups.

They went straight on ;-)

Good luck.

Cheers.

Pretty much the same process but didn't need the weight. If I recall I lowered the car partially onto its own wheels, easy with a lift. I did have a minute where I worried that something on the new floors and cups was misplaced but it soon slipped into place.

PhilM · Post by **PhilM** » Mon Jan 11, 2016 9:38 pm

Thank you for all your advice.

I successfully managed to fit the Radius Arms with some copper grease and some weight in the boot, my other half and my daughters boyfriend, a family affair as you can see, and a little pressure with a jack and POP! on they went, easy in the end but the advice, as usual was the making of the success.

cheers
Phil

64etype · Post by **64etype** » Tue Jan 12, 2016 2:25 pm

I pulled the IRS forward at the bottom using a webbing cargo strap (with ratchet) looped around a half shaft at one end, and the bottom corner of picture frame on the other. (Engine out of car). Doesn't take much tension to move it the required distance. Jack stands were under the splines plus a hydraulic motorcycle jack lightly loaded under the cage for safety. Repeat on other side.

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