Ticking noise under acceleration/load

[VonSchmills]

I've noticed recently that my Suburban is starting to tick under load or acceleration.

Idle or cruise there is no ticking noise.

Ive looked underneath to see if i might have a slight exhaust leak. Nope solid.

I do have a lot of miles 237k, and I was hoping to keep on trucking till 250k+
Any idea what that sound might be or concerns I should have?

 

[JohnBravo]

Did you check the exhaust manifolds? My dad's 2003 1500hd 6.0 developed similar symptoms...replaced an exhaust manifold and the tick went away.

 

[Stepside_fever95]

Doughnut gasket? Mine needs replacement and does this.

Sent from my SM-S920L using Tapatalk

 

[Hipster]

Mine did this and it was one of the manifold gaskets that had a chunk blown out.

 

[ima93chevyguy]

Yes definitely check the manifolds and the connectors, prime spot for them to leak.

 

[shorepatrol]

Driver side down pipe cracked at the flange on mine. Exhaust guy said it was common for our trucks.

 

[White mule]

I agree, probably the donut gasket. Mine had the exact symptoms.

 

[VonSchmills]

Thanks for the replies! I'll give it another look.

 

[superdave]

If you have some really long needle nose pliers, hold a little piece of a paper towel with them and use that to kind of probe around all the exhaust items. A leak will blow that little piece of paper towel and indicate where your leak is.

 

[Biggershaft96]

A good inication of where its at is there will usually be a black spot around the leak