what is this - picture

[your]

what is this? and What does this do?

http://s1128.beta.photobucket.com/user/ ... b.jpg.html

in picture-RED

[iimomar]

It's the injectors cooling system. Basically it is a fan I guess

[your]

but why some car have some dont?

[doingitsideways]

Maybe because turbo engines run much hotter??

Steve

[jamesy12345]

I don't have one on either of my turbos

[jamesy12345]

"Extra cooling fan for fuel system
The B18 Turbo engine on the Volvo 480 Turbo has an extra cooling fan, actuated by a
thermal switch in the cylinder head, which provides additional cooling of fuel system
components which are exposed to possible heat soak. Air is drawn through the scuttle
i ntake and blown through a special gallery located along the length of the fuel injection
manifold and the injectors. In this way, vapour lock due to heat soak is prevented and
effortless starting is ensured even in very hot conditions"

[Volvo480lover]

They apparently removed it afterwards because in some conditions it could cool too much...