The di­rect in­jec­tion sys­tems in the EcoBoost range of en­gines can cause oily de­posits to clog the valves and in­take. Thank­fully, Ra­dium and SCC Per­for­mance are on the case with a com­pre­hen­sive breather and catch can up­grade…

Fast Ford - - How To Fit Focus St & Rs Oil Breathers - Words & pho­tos JON HILL

Tt’s no se­cret the cur­rent Fo­cus ST and RS EcoBoost en­gines can get a bit car­bon’d up since the in­take ports are dry; mean­ing there’s no fuel rush­ing past the backs of the valves to wash off any un­wanted de­posits. In turn, this means the backs of the valves can ac­cu­mu­late a bit of filth, de­creas­ing per­for­mance po­ten­tial and en­gine ef­fi­ciency, and worse still, re­quir­ing the cylin­der head to be re­moved to prop­erly rec­tify the prob­lem. Thank­fully, you can re­duce this ef­fect sig­nif­i­cantly by fit­ting a much bet­ter en­gine breather sys­tem – one that in­cor­po­rates a catch can so that the oily rub­bish sim­ply doesn’t re-en­ter the en­gine. SCC Per­for­mance are firm be­liev­ers in the sys­tem we’re fit­ting as a re­place­ment; show­ing us how to fit two kits from USbased spe­cial­ists Ra­dium En­gi­neer­ing – one for the crank­case, the other as a rocker cover breather. These are ex­cep­tion­ally well en­gi­neered, and the qual­ity is se­ri­ously im­pres­sive. What’s more, they fit use ex­ist­ing fix­ings and sim­ply bolt-in, and can be pur­chased in­di­vid­u­ally or as a com­plete kit (with or with­out an up­rated en­gine breather plate).

There’s a fair bit of dis­man­tling to do to ac­tu­ally get to the bits you need to re­place, but it’s all pretty sim­ple stuff if you have the cor­rect tools for the job. We have to stress here that we are fit­ting the full works – you don’t have to fit the lot. There are stages where, for ex­am­ple, the side plate that holds the PCV valve is re­placed with a Ra­dium plate and their PCV valve, de­signed for tuned en­gines run­ning higher boost. The al­ter­na­tive is to re­tain the orig­i­nal plate and the fac­tory PCV valve, sav­ing costs for those that aren’t go­ing to sub­ject their RS to hard/ track use or run in­creased boost pres­sures.

We fol­lowed along as SCC’s Pat fit­ted the Ra­dium crank case kit first, fol­lowed by the rocker cover breather. Both are in­cred­i­bly com­pre­hen­sive and re­ally well de­signed – each catch can pro­vides a built-in dip­stick so you can tell when it’s full, cou­pled with a drain on the base of the unit. It looks high tech and it’s cer­tainly trick – let’s get on with fit­ting it all…

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