Don1915 Posted October 24, 2019 Share Posted October 24, 2019 Does anyone know what sized / type spark plug gasket is used on the early DB 4 cylinder engines (1915)? Thanks. Link to comment Share on other sites More sharing options...
Guest Posted October 24, 2019 Share Posted October 24, 2019 I am unfamiliar with a DB 4 engine but many engines of that era had spark plugs that were 7/8 pipe thread so no gasket was required. A picture of the spark plug would help. Link to comment Share on other sites More sharing options...
nearchoclatetown Posted October 24, 2019 Share Posted October 24, 2019 DB did NOT use pipe thread spark plugs. If you putting in new plugs the gasket ring came with the plugs. W-16 Champion is the modern plug to use. Link to comment Share on other sites More sharing options...
Don1915 Posted October 29, 2019 Author Share Posted October 29, 2019 On 10/24/2019 at 1:27 PM, nearchoclatetown said: DB did NOT use pipe thread spark plugs. If you putting in new plugs the gasket ring came with the plugs. W-16 Champion is the modern plug to use. No, that's the issue. I'm putting in vintage CICO plugs. Link to comment Share on other sites More sharing options...
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