Engine Whistle

[SeventyOne]

I'd say it's almost definitely a vacuum leak.

[Classics Fan]

Originally Posted by SeventyOne

I'd say it's almost definitely a vacuum leak.

Pretty confident it’s not hoses or plugs so I’m checking intake and carb base torques.

[SeventyOne]

Originally Posted by Classics Fan

Pretty confident it’s not hoses or plugs so I’m checking intake and carb base torques.

check the carb to intake gasket, but might as well look over all the hoses/plugs. be sure not to over-tighten the intake or carb bolts.

if you can re-create the sound at idle open the hook and get a closer look.

[Classics Fan]

Originally Posted by SeventyOne

check the carb to intake gasket, but might as well look over all the hoses/plugs. be sure not to over-tighten the intake or carb bolts.

if you can re-create the sound at idle open the hook and get a closer look.

All hoses and plugs seem tight and secure. The engine runs well without miss or hesitation. I checked torque on the intake and was surprised to find 3 very loose, barely hand tight. I torqued all to spec. I rebuilt the Qjet a few weeks ago but failed to follow up afterwards, after several heating/cooling cycles, to retorque the hold down bolts. All 4 were quite loose so they got retightened to spec.

Forecast for next week is warm temps so hopefully I can check then to see if the whistle has disappeared.