I know that mine did improve (less noise) with the newer struts I used.
and
there and quite a few threads related to heat and the noise...none with any specific resolution that I can find. also not just the xk150.
wj

 

And they are the “correct” struts and springs? Sorry, had to ask.

This is troubling. I wonder. Are you certain its the front suspension? Sound carries.
How’s the driveshaft? The diff? The half shafts?
A motor mount?

 

assuming your asking Sailor Mike...?
wj

 

I can't say anything about the springs as I have not changed them and the previous owner seems not to have made any other mods to the car so I am assuming they are original. I have just checked the old shocks which have Jaguar and the leaper stamped on them with a Ford part number 6W83 18045 AA. The new ones are Bilstein 20-114411 which I was told by the supplier are the same as the original parts and are from the OE manufacturer. I believe they are the correct ones.

The noise is definitely coming from the front, in particular when the front wheels cross an irregularity in the road and sounds like suspension but I'm not sure now. I live on a short unmade road causing me to drive slowly, getting the noise whenever I leave home but when I return after a bit of a run the noise has gone. I do now suspect the engine mounts but the only way to prove it is to change them. They are currently unavailable anyway. This whole exercise is getting expensive.

 

I suspect you’ve got the wrong dampers.
The Bilstein information is incorrect. If the part is listed as also fitting a 5.0L car, the damper is variable, not the on/off type needed for a 4.2L car.

See this thread:
Shock Question

Start reading at post #69. Post #78 has resistance values that you can check to determine exactly what style of damper you have.
I made the mistake of installing the variable dampers on my 2007, and while in this thread I’m saying the ride was softer, it was in fact firmer, as the damper was always in the ‘hard’ setting, as my 2007 car’s electronics cannot drive the variable dampers.
I have since replaced the variable dampers with used on/off ones I found on eBay, and now my ride great, back to what it was supposed to be.

 

kj07xk, I think you are under a misapprehension. The Bilstein catalogue states that the 20=114411 is the correct one for my car. So does the Bilstein UK shop which shows both the Ford number I quoted in my previous post and the Jaguar number in the classic Jaguar wesite (C2P3132) as equivalent to the 20-114411. I have tried to attach links to the correct webpages but it hasn't worked unfortunately. I am sure you can find the pages if you are inclined to check. Maybe I didn't make myself clear before; the point is despite going through the rigmarole of changing one suspension part at a time, the noise persists. It must be something else, but what?

 

Sailor Mike,
never mind...opened my eyes
wj

 

Sailor Mike, hope you’re correct with those dampers, as I’ll probably need to replace my used ones at some point. Maybe I’ll buy a set now (from some place that takes returns) and measure the resistance just to be sure they are correct.