The oil pressure gauge is a simple removable copper tube. Unscrew the nut.
The water temperature gauge is a gas filled tube that must be removed intact. Bulb, tube and gauge is not made to be separated. Care must be taken not to bend the tube too much or it will crimp. The picture is of a 54 gauge but the 52 gauge is similar.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
