FastLane1000
10-03-2018, 02:03 PM
Has anyone had an exhaust leak up around the exhaust manifold / header? I have a faint exhaust leak sound coming from the driver's side up around the motor. I only hear it under load at low rpms like when driving on the interstate with the windows up / radio down. I recently installed test pipes thinking my cats were starting to go. I am dual pulley so it was probably a matter of time anyways. With the test pipes installed I still have the leak somewhere. I installed new gaskets with the test pipes but no sealant. I have tried the vacuum test and sealed up everything downstream. I don't see or hear any leak around my flex pipes. I think it is coming from the manifold/test pipe connection or possibly head to manifold. I am going to try to take another look tonight but everything up by the motor is very tight to work on and diagnose. Anyone else experience this? I don't think the stock manifolds would crack being cast but I guess anything is possible. I appreciate any ideas. May be time to install headers and sell the test pipes.