Reply To: Gasket Sealer on Cylinder Head Cover

Home › Forum › Ask A Member › Gasket Sealer on Cylinder Head Cover › Reply To: Gasket Sealer on Cylinder Head Cover

April 13, 2026 at 2:03 pm #315315
Bob Wight
Participant

    US Member

    Thanks Don.   I typically use Permatex Aviation gasket sealer when a sealer is needed so I’ll use that.   I always use that same sealer on the head bolts.

    You are correct on the thermostat housing – I’ve made sure the head cover pocket and inner bore are absolutely clean.

     

    Bob

    1937 Champion D2C Deluxe Lite Twin
    1954 Johnson CD-11
    1955 Johnson QD-16
    1957 Evinrude Fastwin 18
    1957 Evinrude 3022
    1958 Johnson QD-19
    1958 Johnson FD-12
    1959 Johnson QD-20
    1982 Evinrude 25hp

    “Every 20 minute job is only a broken bolt away from a 3-day project.”
    "Every time you remove a broken or seized bolt an angel gets his wings."