
Is there anything unusual about the Sierra diff cover bolts?? Like them being opposite thread or anything daft like that? Mine aint budged an inch all
day!!
I'm a bit loathed to get big bar and big hammer on it just yet, especially with those stoopid star bolt thingies as I imagine it will cost many
knuckles!!
They are normal thread, a pig to undo I end up cutting an edge on some and using a chisel.
An impact drive is very useful to undo them.
Give them a smack with a hammer then try again
+1
give em a whack with the tool of the pikey then undo with a good fitting torx bit
Cheers fellas, I'll give it a bash (literally), i did give it a bit of a tickle earlier but was worried about cracking the alloy case, but I
guess it'll be reet.
ta
Big hammer and chisel!
But there again I don't re-use the cases after I extract the LSDs 
Impact driver set to '4' resulting in loose bolts and a Dali-esque Torx bit from memory
jk
i remember all mine were like that as well and i too was a little bit scared to whack it with the large adjuster so i just used a good quality torx
bit, with my socket set and a nice long bar, it feels like its not going to go then all of a sudden you hear and feel it go then its lovely and
loose.
Good luck anyways.
as others said, give them a good clout square on their heads with a hammer before undoing them.
if that fails, try an impact driver if you have one, or on some you can get a sillson round the head of it, and if that fails, smack them undone by
tapping them round with a cold chisel