Seized coilovers

[bigpmcd]

So got my car with coilovers, the back sits to low, I have 25mm spacers on the rear and with 2 people or more in back the car just scrapes and exhaust system clips nearly everything. I tried to raise the coilovers but they are completely seized. I tried wd40 penetrating oil, wire brush and extra long clamps. The whole unit starts to spin under extreme pressure rather that just the ring. Does anyone have any tips? I'm assuming I'll have to remove them and pop them in a vice or apply some heat. I'm relatively okay with tools I'm guessing removal will be pretty easy with around 4 bolts holding the unit?

Thaks

 

[Gazwould]

You didn't copper slip the threads when fitting ?

 

[bigpmcd]

Car came with the coilovers on so I'm assuming the last owner hadn't.

 

[rallye_turbo]

Have you undone the allen key on the collar to allow it to spin around?
Other than that some taps on a mallet on the collar. There isn't a huge amount of metal surface area on collar so it should budge eventually. Worst case is yes, some heat.