On 6/8/05, Russell
Duffy <13brv3@bellsouth.net> wrote:
>>>> You have a compression leak if....
<<<<
Very nice write-up
Bill.
I agree bill, thanks.
Dave, I've got to
agree that I've never seen pressure after cool down on any cooling
system. Do you have something unusual about your system, like two
different pressure caps, or anything else that might make it behave
abnormally?
Yes, exactly, two pressure caps in series. The second tank is one
qt and I keep it empty. The first tank is about a pint and I keep it
full. First pressure cap i s 13 psi, and second tank is 20.
Pressure sensor (switch only) is on the second tank.
The second tank acts as my air spring. (see other
post)
I believe the
"normal" way to test for this is to use a coolant pressure tester, or
any other method you can devise to pressurize the
system. I'm thinking you could easily have a leak that
allowed combustion pressure to get through, but would never let coolant
pressure through, particularly pushing liquid.
It would be easy
enough to pressurize the coolant system to about 30 psi and see if the
coolant goes into your new turbo. Also, isn't there a test you can do
where you send a sample of coolant out to be tested for combustion
gasses? That might be easier, and more likely to give a final
answer.
To test, I could remove the cap from my second tank and run the
engine. There should now be no pressure under cap number 1 after cool
down. I will do that test in the near future....
I sure hope it's not leaking Dave.
I guess this is another warning sign that I'll never get with my zero
pressure system, though if I blow too many bubbles, the low coolant
light will come on.
Cheers,
Rusty (zero pressure / ignorance is
bliss)