20V Blacktop Frost plugs

[Petrolhed]

So... Managed to avoid overheating on the motorway last night due to a well placed off ramp and service station, however, I now have two coolant leaks - both from the frost plugs on the front of the block, behind the exhaust manifold.

I assume that the leaks actually developed before the incident as that is the only explanation I have for loosing water over a period of time, and i have never heard of frost plugs being affected by heat??? Correct me if I am wrong here.

My questions are these:

1) Has Toyspeed ever done the frost plugs on a 20V with the engine still in the vehicle? Any tips or suggestions that would mean I can leave the manifold attached?

2) The frost plugs are brass. I was just going to use a pin punch to rotate the plug in the block then use pliers to remove. Is this the easiest method?

Never done a frost plug before, but can't be that hard.... right????

[Dell'Orto]

Yup quite likely...are there tracks down the block? Antifreeze dries off and leaves white trails. Frost plugs are easy as to do, just remove the manifold, its not a hard job. Manifold gasket is reusable.
You've got the right idea with how to remove em.