I noticed today while looking under the bonnet that most of the engine components have either a blue or pink mark on them from like a marker pen or similar, It's a 56plate WRX UK. So is this usuall or has my engine been chucked together from parts out of a scrap yard?
Thanks.

 

Lol white and yellow are scrapyard marks. Nah just joking there could be a reason.....i'm sure someone will give you the answer.

 

Factory paint marks on bolt heads are where the bolts have been checked for correct torque during Quality Control.

 

White = for a guy inspector
Pink = girl inspector

 

Or...

White by FHI.
Pink by STi