jim beam <me@privacy.net> wrote in
news:IqKdnS8WKrBvPgfXnZ2dnUVZ_qGdnZ2d@speakeasy.ne t:

> Dillon Pyron wrote:

>>
>> And if you have a turbo, make sure it idles for at least 30 seconds,
>> unless you have some sort of additional pressure oiling system.
>
> pressure isn't the issue with a turbo, it's "heat soak". heat from
> the turbine conducts back to the shaft and the bearings after it's
> switched off and cooks the oil in it. allowing the turbine to cool by
> idling [some trucks used to spec three minutes] before switch off
> mitigates this. using an oil that can take the heat [synthetics] is
> strongly recommended.
>


I think what Dillon means is the sort of system that maintains oil flow
through the turbo for X-minutes after engine shutdown. Such a system is
meant to prevent the oil in the turbo from being heated to the point of
coking.


--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/