Radiator cap

[Terry Neal]

Tom, the DDA shop in Billings (Interstate Diesel) says they would use
the 9 lb cap if your cooling system is in good overall condition,
especially with the added cooling capacity given the interior heaters &
additional coolers in the Birds. My 6V92 has a Gates 6-8 lb cap on it.
Will probably just put a new 9 lb cap on it & keep the 6-8 as a spare
when I go back together with the new radiator etc.

Terry Neal
Bozeman, MT
82PT40
74FC34



Tom Warner wrote:

> Am in the process of replacing the engine coolant of unknown type
> with 27.5 gallons of Fleetcharge coolant. I noticed that the
> radiator cap is a little tired and replaced it with the same one a
> 7PSI cap since I figured that it is the correct one. Looked in my
> Detroit Diesel factory manual and it recommends that all on road
> engines use a minimum of a 9PSI cap. Just talked to Shane Fedeli and
> he also has a 7PSI cap installed and his factory manual also
> recommends the 9PSI cap.
>
> The blue box owners manual does not say what kind of cap the radiator
> takes. Is there a reason that BB used a 7PSI cap instead of the
> recommended 9PSI cap? What is everyone else using and is this the
> original BB cap? Seems to me that the 9PSI cap would result in a
> higher temperature to be safely reached if there is a problem before
> the coolant boiled.
> Tom Warner
> Vernon Center,NY
> 1985 PT 40 with a 6V92
>
>



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