mrtechnologist2u Posted June 7, 2020 Share Posted June 7, 2020 (edited) There is a spring mounted lever below the carburator on the intake manifold. What does it do? When the engine is cold should it be set up so there is tension holding it up or loose letting it fall down Edited June 7, 2020 by mrtechnologist2u identified year and model of car (see edit history) Link to comment Share on other sites More sharing options...
hwellens Posted June 7, 2020 Share Posted June 7, 2020 I assume you are talking about the spring that operates the heat riser in the exhaust manifold. It helps get the engine warmed up faster and then the bi-metal spring heats up and opens the heat riser. It heat riser is stuck i the closed position, your engine will probably run hot. Link to comment Share on other sites More sharing options...
mrtechnologist2u Posted June 7, 2020 Author Share Posted June 7, 2020 (Face smack!) Of course. It has been an overwhelming couple of days! Thank you. Link to comment Share on other sites More sharing options...
jpage Posted June 8, 2020 Share Posted June 8, 2020 Looks like you may be missing the tension spring that regulates it's operation. Link to comment Share on other sites More sharing options...
Brooklyn Beer Posted June 8, 2020 Share Posted June 8, 2020 On my 39 Chrysler it was explained to me as it heats up, the little weight on the end of the arm helps to close it. I have no spring and have mine wired closed being it is summer. Yours looks stuck open. Link to comment Share on other sites More sharing options...
jpage Posted June 8, 2020 Share Posted June 8, 2020 It's actually closed when the weight is up. The heat relieves the tension in the spring allowing the counterweight to fall and open the shutter. This helps to warm the fuel in cold weather for better atomization of the fuel.These things usually corrode tight but can be carefully loosened up.It's usually an easy fix and can really help when starting. Link to comment Share on other sites More sharing options...
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