David S. Wallens
David S. Wallens Editorial Director
9/22/21 9:10 a.m.

Tapping or ticking from the top end of the engine
→ Loose valves or other valvetrain issues

Tapping or ticking from the bottom end of engine
→ Main or rod bearing issues

Rushing air sound that increases with engine speed
→ A loose component in the intake tract


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PetervonA2 New Reader
6/22/22 11:52 a.m.

My freshly restored 1958 Giulietta Spider Veloce developed a wheezing, kazoo like sound coming from the engine. My first guess was a cylinder's header pipe was loose at the head, causing the thin cooper gasket to sound like a reed in a wind instrument. Nada. An expert's ear guessed it could be a dry cam bearing, yikes but nope, the caps were oily. The source I found finally was all eight impossible to access nuts that secure the DCO3 Webers. They were just finger tight. It takes a special set of crippled 12mm wrenches to fix that.

Cheers, Peter Pleitner


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