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Also don't to wait day before torquing. Any gaps will be maintained as sealant will have solidified in that time. Instead:
0. clean off gasket, head and valve-cover of any old gasket material
1. use non-hardening gasket-maker material: Toyota FIPG, Yamabond-4 or Hondabond-4
2. apply thin even layer to cover, add gasket and apply thin layer to gasket
3. install on head
4. torque to 33%. This is critical step as it will compress sealant and squeeze out any air-bubbles and gaps
5. let sit for while, 6-12hr should be sufficient
6. torque to 100%. Now you've even layer of sealant with compression preload on it and gasket.
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