LS1GMCTruck

iTrader: (2)

On a 2001 F-Body LS1 throttle-body, is blocking off the ends of the pass-through heating tube, for cold motor start-ups, really necessary? This is'nt a potential source of a vacuum leak, is it? (I have the usual reroute to the radiator)Thanks

jimmyblue

iTrader: (11)

It's just a straight-through channel, does not see
intake air. I cut the whole boss off mine, nipples
and casting, with a hacksaw for clearance.

bczee

iTrader: (12)

I did the same, well.. I broke mine off trying to twist them out.. LOL.. or you can just plug them.

LS1GMCTruck

iTrader: (2)

Thanks guys.

Rodder

iTrader: (2)

And that's not for cold starts... it's to prevent icing in cold weather.

99'CajunFirehawk157

iTrader: (57)

So you left the holes open or siliconed for appearance purposes?

Nashty

iTrader: (7)

I cut the whole thing off completely. It interfered with my Magnacharger water in / outs.