1929 Heat riser block-off modification

[jps]

I heard that some people just block off the heat riser to prevent it from causing problems (leaks, etc). It looks to me like the best place to do that would be at the port between the heat riser and the exhaust manifold - just make a new solid gasket plate to cover the hole. Then it looks like I should also keep the large valve to the exhaust pipe fully open. Does that agree with what anyone else has done?

Thank you.

[Mark Shaw]

Yup! You can also block to outlet tube with a freeze plug.

[AzBob]

On my 1926 Standard Six, The damper on the exhaust manifold outlet is fixed wide open and control rod removed. However, I have left the heat riser portion functional as the tube and butterfly were in good shape. A little preheat may actually help with warm up on a cold morning. It is common to make a plate and totally blank off the heat riser from the exhaust manifold.

Bob