oil catch tank

[gaz 7470]

hi looking to buy a rx7 and the one ive seen has a oil catch tank on it but have no idea what this is or what it does any help would be great thanks

[20B_boy]

Basically:

As your motor works it breathes/vents all manner of oily/petrolly scum like any other engine. On a standard car this rubbish is fed back into the intake tract - hence why you often get a small build up of black sludge in your intercooler piping. In theory with a catch tank fitted the vented rubbish should just collect in the catch tank for disposal at your leisure, rather than contaminating your inlet charge...

[gaz 7470]

ok thanks for that gotta be a good thing then

[20B_boy]

That\'s about the size of it.

[GaryS]

Oh and if you like shiny bits in the engine bay, well  it\'s a shiny bit. :rolleyes: