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1. 

   Joined: Nov 26, 2022
   Posts: 31

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   Douglas Smith

   Member

   from Sunderland, MA

   Do the exhaust manifold bolts penetrate the water jacket in the cylinder head?

    

   Douglas Smith, Sep 28, 2023

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   saltracer219 likes this.
2. 

   Joined: Sep 23, 2006
   Posts: 1,168

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   saltracer219

   Member

   from camas, washington

   The lower row of exhaust bolts go into water on the early Olds heads, that is why the factory used studs. If you replace the studs with bolts use a good non hardening sealer on them like Permatex #2.

    

   saltracer219, Sep 28, 2023

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   '40 Coupe Fan and Paul like this.

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