The two pumps are total equivalent replacements, except that the aluminium
one is usually better! If buying one, get the one with the deeper impeller,
even for small block engines - sometimes you need to grind the back of the
"hole" that they mount into. Make sure that the dowels that locate the pump
are there, and that they seat all they way into the pump - sometimes they
can hang up a bit and not let the pump seat fully on the gasket. about 20
ft lbs is normal for 5/16" bolts, but really you just need to do them up
tight with a 8" wrench handle. I always put these gaskets on dry, no
sealer, personally.
brian
At 08:47 AM 06/11/97 -0500, you wrote:
>Hello Fellow Spridgeteers:
>
>I recently replaced a cast iron water pump with a new one from Moss that
>was aluminum. I has been fine for a couple of months but now is leaking
>where it mates to the block. It could be a gasket failure (my fault)
>but I wonder what experiences others have had with this newer pump. Are
>there any special precautions I should have observed when I installed
>the new one? I am going to take it back off and check it out, should I
>use a silicone gasket sealant or just put a new gasket on and try it?
>What about torque settings with the aluminum vs. the iron casting?
>
>Thanks for all your assistance;
>
>Mark
>70 Midget
>Nashville
>
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