I had to use a sealant on the flange between valve and heater core. I used Yamabond 4 because I had some and know it's a good product. My first attempt failed because I didn't let it cure long enough (24 hours). After curing for several days I put the core into service and verified that it no longer leaks. I don't know why I had to use sealant, I've never used sealant before and have not had leaks. -Mark On Tue, Jan 18, 2022 at 6:13 AM Mark McCulley <markmcculley@gmail.com> wrote: > I just replaced a leaky rear heater core and am having an issue with the > flange on the new core sealing to the metal GoWesty valve that I've had for > several years. I did obtain and use a new o-ring from GW. It seems that the > new o-ring isn't compressing sufficiently--the plastic flange on the heater > core bows in the middle when I cinch down the two bolts that secure it to > the valve. > > Has anyone else encountered this problem? > > -Mark > '87 Westy > |
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