whistling exhaust

joeparamonkey

Member
May 17, 2012
79
San Antonio, TX
Hey gang. Anyone ever heard an exhaust whistle? I hear it when going down the road and pass by a curb or a wall. I thought it was my water pump, or PCV valve, but when I pop the hood and rev the engine I don't hear a thing in the bay. I hear it out of the exhaust in the back and down below at the pipe. Maybe a leak? Any ideas/advice? Puzzled :confused:
 

Twisted_Metal

Administrator
Staff member
Lifetime Gold Member
Feb 26, 2004
31,903
Bloomington, MN
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Yeah... Probably a leak somewhere.
 

Johnny.chev

New Member
Jan 30, 2014
24
Weymouth,Mass
could be exhaust blockage, to check hook up vacuum gauge rev engine to even rpm (steady) then check gauge it should read steady or if it drops slowly could be blocked header tube, cat converter. muffler, y-pipe.
 

muscl car

Veteran Member
Lifetime Gold Member
Jul 8, 2001
24,050
Gallatin Tennessee
I've heard exhaust chirping before but it was on a big cubic inch ultra high compression comp eliminator motor and running large tube race headers . This chirping sound was due to the cam's valve event timing causing the exh pulses to react against reversion

On my 350sbc I myself was getting a chirping sound in the exh after I temporarily installed the stock log exh manifolds . Once I swapped back to headers the chirping stopped
 
Last edited:

RS1979

Veteran Member
Lifetime Gold Member
Jun 18, 2013
4,055
Memphis, TN
With that exhaust system you shouldn't have any muffler build up to plug it up. I'd say look elsewhere.
 




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