Plenum tickover adjustment screw

[Bluebottle]

My car spat mine out, on the M25 this evening and with a blower it was whistling like a kettle. I stuck a tyre dust cap in the hole and duck taped over it to get me home, but I need to replace it...anyone know where I can get a replacement?

[spend]

Can't recall what thread it is m6~m8~1/4unf~5/16unf, but I've just turned down socket set screws (allen grub screws) with a @30deg point to replace.

I've tended to use short ones that leave just enough thread in the plenum so that a cap screw can be screwed in on top to lock the idle screw down, if you are worried about it coming loose (originally there should be a tamper seal on top).

[Bluebottle]

Thanks for that Dave
Got lucky this morning and found a local Indie that has an old plenum on the shelf i can rob for parts