[FC] PG pressure on coolant lines

[Keith Hammett]

Jim,

This is the pressure in the main circuits (pump pressure).  I do not
think this is the pressure on the coolant passage.  I don't think that a
rubber hose and hose clamp can take the 157 to 200 psi for very long.

However since you said it was in the shop manual, I had to take a look
again and sure enough there it is, pump pressures on page 6E-26.  If you
look further in the '61 manual on page 6E-28 and 6E-29 in the "Front
pump body test plug and oil cooler connections" section it says "As
mentioned, in the event of a blockage within the oil cooler or its lines
which would create a pressure build-up in excess of 15 psi, a small
poppet valve located in the front pump body will be opened..."

So it looks like the oil cooler and lines does not see a pressure of
more than 15 psi.  This would be for an early transmission I wonder what
a late transmission pressure is.  If I had to guess I would say that it
is the same since there is no reason for higher pressure on the cooler
lines.  Anyone modified a late case for the cooler lines and measured
the pressure on the cooler lines?

Thanks Jim for pointing me in the right direction!

Keith Hammett 

-----Original Message-----
From: James Davis [mailto:jld at wk.net] 
Sent: Thursday, January 03, 2008 3:35 PM
To: Keith Hammett; corvanatics at corvair.org
Subject: Re: [FC] PG pressure on coolant lines

It is in the shop manual.  61-63 -- 47 to 157 psi and 64-69  --  52 
to 200 psi.  The shift linkage, TV linkage and the modulator 
determine the pressure between the extremes.
Jim Davis

At 12:30 PM 1/3/2008, Keith Hammett wrote:
>Anyone know the pressure on the oil cooler on a PG?  I checked in the
>articles that Bob Ballew did but found nothing on the pressure on the
>coolant lines, just main line pressures which would be too high for the
>rubber hose connections.  Mine was not hooked up and I would like to
>test mine for leaks and would like to know what to test at.
>
>
>
>Thanks,
>
>Keith Hammett