I was out getting an alignment for my X-Type today, got the printout back, and noticed the camber on my rear right wheel was on the higher end of the Jaguar acceptable specifications. From the naked eye it looks fine, but I assume my rear upper arm bushings are probably just getting worn. I was planning on replacing it with a standard X-Type arm, but then I got to thinking about it, and it would be a good opportunity to upgrade if I can.

I've seen people do the rear upper arm (Thermo) mod with the adjustable arm from a Volvo S40. However, is this doable with one of the standard non-adjustable Volvo arms? I assume the bushing distance and everything is the same... If reading through the old Thermo Mod thread holds true, the Volvo arm is beefier/stiffer and even if non-adjustable should be an upgrade, no? Also they're ~30% cheaper than the equivalent X-Type arms, so if they're better, and cheaper... seems like a logical swap to me.

 

Bucklespring, you are correct in some aspects, but I think you are also missing a key point. Yes, the arm should help out with things. But, part of the reason that the rear tires are leaning in is because the springs are sagging. So, if you had new springs, then yes, your logic is sound. But, with worn springs, that is why you need the adjustment. not all springs sag the same way.

 

Ah interesting. I'll try and get the car in the air when I have time. What's the official spec I should be looking for in terms of ride height?

Let's hypothetically assume they're not sagging (even though they probably are), what's the viability of the Volvo arm vs the Jaguar arm? I have no doubt that mine are probably worn, again, with the mileage.

 

I have Volvo non-adjustable upper arms on my X Type. They have been there for around 3-4 years and are doing fine.

 

I have them and they are fantastic

 

The adjustables or non-adjustables? If non-adjustable, any issues regarding rear camber?

 

Buckle, grab the JTIS from the stickies at the top of the page. Inside that, it gives the ride heights. This is also a good reference for a lot of repair stuff.

 

Adjustable (Thermo) type