Check to make sure you did not bend the timing cover when installing the
waterpump.
Bill

"Bob D." wrote in message
...
Exhaust flappers?

In article ,
(FOP NO98) wrote:

Fired up my four-year old Jasper remaned 5.7 Mercruiser (carb ) today.
Now
have a metal on metal-(ting ting ting) sound coming from what seems to
be the
timing gear cover. Seems to dissapate when the engine warms up. Motor
has
about 130 hours on it. Put new water pump on it two weeks ago. Any
help would
be appreciated!