VR6 Corrado : Very Hot Intake Manifold?

[Slinky]

Folks,

Colleague in the office has a VR6 'rado... The aux water pump seems to be running quite a lot and the intake manifold seems to get REALLY hot (as in, can't leave hand on there for any time at all)...

Temp gauges don't report anything untoward, but I suspect that something is up..

Any thoughts? Radiator was replaced a couple of months ago, so I'm potentially suspecting an airlock of some description?

TIA,

slinky

[Tame Technician]

sounds normal to me. Those pumps run all the time on teh Later VR6 engine in the Audi's I work on. Anything metal bolted to an engine is too hot to touch.

[RadoVR6]

It is normal.

It runs over the top of the engine so it gets hot by the heat rising from the engine.

[Slinky]

RadoVR6 said:

It is normal.

It runs over the top of the engine so it gets hot by the heat rising from the engine.

And the regularly running aux water pump?

I suspect, if this is the case, that maybe the pump has just got noisy in its old age?

[RadoVR6]

Slinky said:

RadoVR6 said:

It is normal.

It runs over the top of the engine so it gets hot by the heat rising from the engine.

And the regularly running aux water pump?

I suspect, if this is the case, that maybe the pump has just got noisy in its old age?

I'm sure it runs all the time anyway. With it being a larger engine it helps pump the water round more effectively. Something to do with the size of the cylinder head i think.

The guys on the corrado forum will explain it/help you better.

[corozin]

You're not describing anything unusual. The inlet manifold is actually heated by the coolant system!
Nothing to worry about - except the ongoing risk of scolding yourself

[SuperchargedVR6]

The throttle body is, but the manifold isn't.

The Aux pump runs all the time the Engine & ignition are on. When the engine is powered down and ignition off, the Aux pump runs on for about 6 or 7 minutes.

The heat in the intake is the result of 6 cylinders crammed so closely together in an equally cramped working space.

All typical Corrado behaviour!