dont try gasket sealer for the love of god dont!!!

i tried it, made the leaking worse and when i took the cover off it had gone all blue and little tiny flakes of sealer were everywhere. took forever to clean the top of the cylender head and its left the rocker cover a right mess as it wont come off. no damage has been done luckily but there is the possibility those flakes could block the oil galaries or get into the oil pump and ruin it. i will NEVER do that again on a zetec engine.

i did see the one on ebay for £30 but i'm too much of a tight fucker to pay that much. i'm kicking myself now though as a couple of months ago a brand new one off a brand new replacement engine someone had bought but was using a different cover went for about £5 but i saw it too late and didnt get my bid in on time!

its true though if your breather sytem is blocked it'll pressurise the engine and force oil out the rocker cover aswell as else where but as you said you can blow through yours very easy so its not that.

i think the only solution is a replacement rocker cover off an engine that clearly has never leaked and then fit a new gasket on from ford. i wonder if the mondeo rocker cover will fid as the gaskets are a different design and i think seal better??

might have to try that. anyone any ideas on mondeo rocker covers on focus?

only down side is it'll make it look like you've done an engine conversion and used the mondeo engine.