I have a friend with a stcking thermostat and he asked if he can get away with a eurocarparts stat, are the 1.8 engines fussy about this ? as I know they prefer genuine parts like plugs, ht leads etc just wondeirng if the same goes for the stat ?
When I did mine I used a genuine one about £12 more than the £9 euro one! fit like a glove never missed a beat since. Plus £2 odd quid for the seal which doesn't come with it from ford.
I was told I should change the housing aswell but thats mighty expensive and had no issue, I think its a common fault on the focus a leak housing but mines been fine. I was careful doing the bolts up no the crack it. I think they warp or something.