turbo head stem sizes
Turbo Mini Forums

confused with this one

I picked up a free turbo head of very nice mr wolfie,on valve removal in/ex valves all 7mm is this possible??
It came of a e reg turbo but as wolfie said it never run right,
the casting is smooth under the thermostat and has double springs oh and 8 stem seals???
maybe someone changed the valves and stems

Please help with my mystery Brian

Metro turbo weekend driver,Mini turbo in the making again!

What size are the exhaust valve guides? I take it they are 7mm to match the valves?
Seems unlikely someone would go to the bother of putting all different valves and guides into a turbo head that were obviously wrong so I would guess its a NA head that someone who didn't know any different has bolted onto a turbo?

Sodium valves are 7.9mm according to haynes

its a 12g940 and has "6D9"cast between 2 cast imitation screws behind the therm housing

Metro turbo weekend driver,Mini turbo in the making again!

No what I meant was, if it has got fitted all 7mm valves at the moment, has it got the correct 7mm exhaust guides for the valves, or has it got 8mm exhaust guides that would indicate it is a turbo head?

Casting numbers mean nothing to me but might to some other people on here?