wierd sound coming from passenger side Exhaust

[LuckyWinner]

Driver side exhaust sounds great....but the passenger side exhaust has a tinny popping or hissing sound. Checked spark, that's ok....all header pipes getting hot. Could it be timing? loose rocker arm?? I don't have any ideas. Anyone have any input? I am running a Carb and have a 393.

[Jeff Kleiner]

Header leak?

Jeff

[68GT500MAN]

I would re-check the header bolts.
Doug

[CraigS]

Get a mirror on a stick so you can look under each exhaust port. If you see any darkening that's an indication of a leak.
http://www.autozone.com/test-scan-and-specialty-tools/inspection-mirror

[Mesa Mike]

Lucky...it is common for the header bolts to back out. It can make a variety of sounds and can sometime sound like a tapping sound like a loose rocker. It normally takes a few heat cycles for the bolts to stay tight. I always check before a track day or a long trip. SOP for these cars.

[LuckyWinner]

tightened bolts and still have that damn sound!!! Will investigate more after I get off of work!!!! Ahhhhhhh