The new seal should be carefully
removed from it's packaging. It is VERY IMPORTANT to not touch
the mating surfaces of either the upper or lower seals. This is
a lapped surface and the oils from your hands can carry contaminates
which can be enough to cause the seal to fail.
Find a socket or piece of tubing
that will fit the inside diameter of the upper seal housing and
will also fit over the seal and spring of the upper seal. It should
be flush against the metal lip on the upper seal.
I have used a 12 point 1 1/16"
socket with success and in this case we used a 1"copper female
adapter, because it was in the shop and it fit.
Place a small amount of high
temp gasket seal around the outer edge of the upper seal metal
cap. The sealing surface that cannot be touched is facing down
and is inside of the copper fitting that we are using to hold
it and install it.
The seal is then carefully lifted
into place and then tapped up to the point where the seal lip
contacts the lip on the inside of the pump housing. The upper
metal surface of the seal should be in the same position with
relation to the casting when it is in place, usually about 1/64"
below the casting opening.
I place a very thin film of the
gasket seal on the impeller center and then carefully place the
new lower seal into place with the rubber facing down and centered
on the impeller shaft hole. BE Careful not to touch the seal surface.
The impeller is now ready to
be installed. Be careful to not touch the pump shaft to the seal
surface, just guide it up so that the threads contact and then
rotate the impeller to fully engage the threads onto the pump
The impeller is then tapped in
the opposite to the direction of rotation to tighten it onto the
pump shaft as shown in the photo below.
The blue housing gasket is either
reused or replaced. Be sure to put a bit of gasket seal on the
threads along the sides of the bolt. You don't want any to get
into the housing so don't put any on the end of the bolt. Also
seal off the rear housing hole with gasket seal as there is no
bolt there to plug the hole, only the flat upper casting. I use
the gasket seal on the upper and lower gasket surfaces. If your
pump has several gaskets, replace them with gaskets of the same
thickness to keep the impeller clearances the same.
You don't want to use so much
gasket seal that it will enter the pump housing interior where
it can break free and contaminate your cooling system, use it