headers are cracked at 30000 miles?!

[skennel23]

So I was taking a peak under the hood and I noticed my headers are cracked where the bolt screw into the engine. The cracks are pretty large and you can definitely hear it when started cold. When the engine warms up its not as bad. Anybody else experience this with such low mileage? I only have a little over 30000 miles on it.

[josh202]

Which brand of headers do you have? or do you mean the stock manifolds?

[skennel23]

stock manifolds.. sorry

[TJay74]

First I have heard, it is covered under warranty though. This would fall under the emission warranty of 8yr/100,000 miles I would think.

[gone_fishing]

The are cut from the factory:

 

Exhaust manifolds: the exhaust manifolds were developed to improve durability and sealing and reduce operating noise. The cast iron manifolds feature saw cuts along their cylinder head mounting flange, which split the flange into three separate sections on the V6 and four separate sections on the V8s, allowing each section to move under extreme hot-cold temperature fluctuations to virtually eliminate movement of the exhaust manifold gaskets. That helps ensure proper sealing for the life of the engine and reduces the chance of gasket failure. The exhaust manifolds also feature triple-layer stainless steel heat shields, which limit heat transfer to the engine bay and help further reduce noise.

Read more: http://gmauthority.com/blog/gm/gm-engines/l83/#ixzz3SIrXBTp5

[skennel23]

The are cut from the factory:

 

Exhaust manifolds: the exhaust manifolds were developed to improve durability and sealing and reduce operating noise. The cast iron manifolds feature saw cuts along their cylinder head mounting flange, which split the flange into three separate sections on the V6 and four separate sections on the V8s, allowing each section to move under extreme hot-cold temperature fluctuations to virtually eliminate movement of the exhaust manifold gaskets. That helps ensure proper sealing for the life of the engine and reduces the chance of gasket failure. The exhaust manifolds also feature triple-layer stainless steel heat shields, which limit heat transfer to the engine bay and help further reduce noise.

 

Read more: http://gmauthority.com/blog/gm/gm-engines/l83/#ixzz3SIrXBTp5

 

Thank you very much. I had no clue they had done this, still doesn't answer why I have a strong tick coming when the engine is not warmed up, must be the valves or something need to be cleaned

[TJay74]

The ticking could be the DI injectors, they are known to be loud.

[07Softail]

The ticking could be the DI injectors, they are known to be loud.

Correct they are real noisy at cold start and quite down after warm up...I can still hear them though.

 

RT