Yes, this would work too. But youll probably need two one for the pcv and one for the breather.

 

I want to fit two breathers onto the valve cover. One on the PCV itself and the other on the valve cover vent. What should I use to cap off their corresponding intake manifold and intake arm holes?

 

A piece of hose with a bolt or something similar plugging the open end.
I use heat shrink caps on mine, they are pretty rigid and will probably handle some boost as well.
Link to show an example

 

Thanks mate

As for removing the hardline that connects the valve cover vent to the intake arm and has those two small hoses from what seems to be the fuel rail, what do I do with those? Leave them open? Is the thick-ish line underneath the TB connected to that hardline a coolant line or just the air pump line?

 

I think you got both air pump lines and a coolant line.
The coolant one can be capped off, it's just for heating up the TB and IACV.
The air pump stuff you might need a specific delete kit to be able to remove without a CEL, unless you got an aftermarket ecu?

 

Nah I'm just wondering about that short coolant line. Thanks for the advice. could I perhaps run a longer hose in place of that shorter coolant line once I remove the hardline as opposed to capping it off?
I'll leave the air pump as is. I don't have a stand alone. Got a piggy back unit yes but that's not in until I decide to slap my Vortech on. Need a few bits before doing that.

 

Yes that would work if you still want to heat up your TB

 

Um, what's the purpose of heating up the TB? is it for warming up the cat faster for better emissions control?

I assume if I leave the coolant hoses open without a bridge between them (hardline seems to be the bridge now) I'll have coolant spilling everywhere? Think I know the answer lol.

 

It's just to help the TB not to freeze up in very cold conditions, it's also heats up the idle air control valve which sits on the side of the intake manifold.
If you follow the coolant line it will end at the thermostat housing, so if you don't want to plug it up you could route it down there directly instead and bypass the TB and IACV.

 

Ah I see. Here in SA it never gets to the point where the TB could freeze haha. I'm sure in Sweden it does
OK so I could follow the line down to the thermostat and bypass it up top. I've seen many videos now where after the intake arm hardline has been removed, they run a hose directly from the port closest to the runners to that port coming from the IACV. Seems like the easiest way?
I just wanna prevent oil going into my IM asap and might get a catch can for the PCV itself to vent into then delete the hardline and run a breather filter on the valve cover vent. I could then run a return from the catch can to the IM port to ensure vacuum is present for the PCV because it seems like the can I can get locally doesn't not have a breather port on it. It's the D1 Spec.