coolant and oil plastic cover

[zft325]

HI guys, sorry for the description on the title but im referring to that plastic black thing that covers the valve pin when you want to bleed the air from the radiator. i just finished bleeding the system and i forgot to put that back cause i was monitoring the valve pin. now my systme is ok my question is: if i put that back do i need to bleed the system again cause im going to open the cap again? or is there another way i can open the cap that wouldnt require bleeding it again? i heard people say that during morning i can open it because no pressure yet on the system? any help would be appreciated. thanks guys

[N41EF]

Yes you can remove the cap without getting air in the system. Wait until the engine is cold, then put the cover back in. As long as the system is cold, there shouldn't be any pressure differences that would push any air bubbles anywhere.

[zft325]

ok cool!! thanks ill do that tom