zetec oil leak from filler cap

[anonymous-user]

Finally got my Fury ready to drive, so I went for a fairly gently 10 mile round trip, when I got back I found quite a good leak of oil all around the filler cap and running down the rear/side of the engine, down the bellhousing. Engine is a 1994 Silvertop 2.0 Zetec with Jenvey TBs.

I have the cam-cover breather t-ed into a pipe from the crank breather, which then leads to a catch tank, which has a small breather filter on its second outlet. The catch can has some clear water in it but not really any oil, although I can see some signs of fumes coming in from the engine side when its running. The water I assume is condensation as the car has not run for more than a few minutes at a time since last year as I rebuilt it.

There is no rubber seal on the oil filler cap, not sure if there should be. Also I noticed there is no baffle plate above the camshaft under the oil filler neck, again I'm not sure if there should be?

Aside from this it ran perfectly , oil is clear and still full , temperature sat at about 90ish on the gauge , coolant is clear blue etc...

Can anyone suggest what could be causing this leak?

I wondered whether there was too much pressure in the catch can or the filter was too restrictive or something, so next time I'll leave the catch-can cap off it and see what happens , but perhaps do I need to modify the crank breather valve or similar, I've seen it mentioned in places.

thanks
James

[Justin S]

Zetecs dont breath heavy unless on its way out. I cant remember from servicing my daughters silvertop in her focus if it had a seal, but suspect it should have one. There was one on my blacktop in my westfield. I have plumbed both into a tank like you and hardly ever got much oil in there over time.

[Black_S3]

JimSuperSix said:

Aside from this it ran perfectly , oil is clear and still full , temperature sat at about 90ish on the gauge , coolant is clear blue etc...

C

Coolant should be OAT, which is generally red/pink.

JimSuperSix said:

There is no rubber seal on the oil filler cap, not sure if there should be. Also I noticed there is no baffle plate above the camshaft under the oil filler neck, again I'm not sure if there should be?

Just checked mine... There is a rounded rubber seal on the cap that looks almost built in - it's not, picking at it and it does move. Also the cams are visible, so no plate.

Edited by Black_S3 on Wednesday 11th May 12:21