Porous Head Mod

[Bubba]

what is the porous head mod that people do? im sure i remember someone saying something about 8mm aluminium bar cut to 87mm (i think)

just wondering as i have a load of 8mm aluminium bar ive stashed at work

[nova_saloon]

yep thats it did it last week, was terribly good fun! Drilled out the old bung as it was good and stuck, saved the original threads. then tapped in a new one, got stuck half way through so i only had it half done but it covered up where the crack forms so its all good really. but worth a shot if you want to give it a go!

[Bubba]

they have to be threaded? i was thinking about making some up...but i dont know what they need to be like

[Saloony]

I see one lad use copper pipe. Never threaded it tho, more compression fit.

[philip]

think the oilway is 7.9mm diameter so use a 8mm od tube or get a 7.95mm tube made and knock/press it in carefully.

i do the mod externally where block the centre oilway with tapered alloy pins and machine the end of the head and fit a braided line, dearer but found much more of a permanant fix

[Southie]

Here you go Bubba happy reading: Porous Head Modification LINK (http://www.orsas.com/CarStuff/cav/)

Typed the link like that so easier to find on the search ;)