Fiestamatt

can any1 shed any light on why i keep blowing off my oil filler cap, what could be wrong, how can i fix it.

Thanks in advance
Matt

jrs

It could be crankcase compression (worn rings) but as you have a new engine try a new cap the rubber seal go's in the inside try the new type with the grub screw

Oranoco

Strip and clean out your breather system before worrying about serious issues. And buy a NEW oil cap as the rubber seals in them go shitty after a time.

Could also be ring blow by pressurising the crankcase, but do the above first before worrying about that.

turboben

have you got a chrome rocker cover as i found when i fiited mine the cap kept blowing off when i put the standard one back on it was fine

Fiestamatt

ill give the above a try, thanks for your help peeps.

Matt

ram

iTrader: (4)

mine kept blowing off. since ive changed the head gasket and put a new cap on it doesnt happen. but theres still pressure quite abit of pressure in the head. not sure if thats normal or not?

Mr Sam

engine cant breath somewhere

ram

iTrader: (4)

beef2001

yeah mine get coming off but then i put it over the rubber tight fit no probs

Mr Shannon

Get a rocker cover with a screw on cap instead

jrs

Think he was looking for the reason why it's doing it Don't think he was looking for a solution

Oranoco

And a poor fudging solution at that. Sort the problem not the symptom

beef2001

Wat thats all a bit too technical I gave advice that will stop the cap from coming off

fizzyturbo

have a look at the breater pipe at the back of the block, its usually to do with a bit of crank case pressure, or maybe think about a breather system, tend to work better then the stock ford system

jayRS

take the breather filer/pot off and replace it, your problem will be there more than likly.

but dont bin the old one, i may want it

BRAMMER

iTrader: (23)

Did you get sorted matt???