Exhaust tick tick tick - 73 Jeep commando

[BK911]

73 Jeep Commando with the AMC 258 inline 6.

Car runs very well for the most part.
However, when cruising then letting off the gas, a tick-tick-tick sounds starts coming from the exhaust.
Not sure if its a hole, or bad exhaust valves?
Any idea where to start?

[drkshdw]

Exhaust gaskets. Replace em, get the exhaust hot and re-tighten em. And go with OEM...aftermarket gaskets are notorious for leaking (ticking).

[vash]

^^that or look for a cracked manifold. my jeep had a tiny hairline crack that was a challenge to find.

[VincentVega]

If the hole/leak isnt obvious I've had good luck moving a rag or glove around the manifold and listening for a change in sound. Sometimes you can feel the leak right away with the rag.

[cabmandone]

Get under it and look for any carbon buildup at the exhaust joints and at the manifold. If there's a leak you'll typically find a bit of black carbon buildup to point you in the right direction.

[911boost]

Yep, my ‘66 Mustang did that too when I needed to replace the exhaust manifold gasket.

[BK911]

Thanks guys.
A little relieved nobody thinks its exhaust valves.
I plan on replacing the exhaust anyway.
And no issue on putting it off, just like to get things fixed.

[porsche930dude]

My jeep had a cracked manifold i wrapped stove rope around it and a hose clamp it lasted a few years till i found another at the junk yard. but often times i guess they arnt in a good place to clamp like that

[asphaltgambler]

Warping/ cracking very common, as said above look for black soot

[Don Ro]

I had a '92 Jeep XJ and a cracked ex. manifold was not unusual. Mine was fine.

[john walker's workshop]

Stick a small diameter hose in your ear and pass the end around the manifold.

[vash]

Originally Posted by john walker's workshop

Stick a small diameter hose in your ear and pass the end around the manifold.

i did this. it's been years. i think i used a section of garden hose with a stick pushed into it.