TB Coolant Passage

[Mach 1]

Originally posted by gtsr515
Your right that the coolant lines cool the EGR gasses, but your wrong that it doesn't help cold start up, your forgetting the 5.0 owner in Alaska in winter time, there, the coolant is warming faster than metal surroundings, it serves the same purpose as a heat riser tube from an exhaust manifold on a carburated car.

That is incorrect the way I see it. The heat riser tube from the exhaust manifold on a carbed car had a valve which would close the exhaust gas heat to the intake after warmup. There is no way to close the coolant flow off on the EGR spacer. And also, the exhaust gases heat up immediately, therefore sending warm air to the intake immediately. The coolant does not warm up immediately and would not serve the same purpose as the exhaust riser on a carbed car from that perspective at all. Once the coolant is hot, so is the engine. It makes no sense to pipe cold coolant to facilitate cold start up, and once the coolant is warm, the engine is warm, so I dont see the logic from that angle eithier.

Coolant is warming faster than metal surroundings? By the time that coolant in Alaska is warm enough to do any good, the engine is also warm enough to not need it at the intake.

I can see your point to a degree, but it just doesnt add up.