8.1 Vortec
Has anyone had problems with exhaust manifold leaking or cracking.
Forum Discussion
- No problems with my 03 at about 220,000 Km.
IAMICHABOD wrote:
drsteve wrote:
IAMICHABOD wrote:
The other fix was to put headers on,not an option here in California due to smog regulations.
There are approved headers and other aftermarket performance parts available that do meet the Cali requirements.
https://www.smogtips.com/aftermarket-performance-parts.cfm
At the time mine failed there were no California approved replacement parts,believe me I checked.
As others have said check your warranty,that is how mine were replaced for free.
Banks has had CARB approved replacement exhaust components since the early 90s.drsteve wrote:
IAMICHABOD wrote:
The other fix was to put headers on,not an option here in California due to smog regulations.
There are approved headers and other aftermarket performance parts available that do meet the Cali requirements.
https://www.smogtips.com/aftermarket-performance-parts.cfm
At the time mine failed there were no California approved replacement parts,believe me I checked.
As others have said check your warranty,that is how mine were replaced for free.- Take a close look at your warranty most exhaust systems are covered for ten years as part of the smog control. Had the same problem on am Isuzu Ascender and was replaced under warranty.
- I know the early 6.0's had issues (mine my 02) with header bolts breaking resulting in leaks.
IAMICHABOD wrote:
The other fix was to put headers on,not an option here in California due to smog regulations.
There are approved headers and other aftermarket performance parts available that do meet the Cali requirements.
https://www.smogtips.com/aftermarket-performance-parts.cfm- Broken studs on ours, I installed headers so I wouldn't have to deal with it again.
IAMICHABOD wrote:
...The other fix was to put headers on,not an option here in California due to smog regulations...
Don't understand. All emissions controls are still intact on ours after installing headers. Catalytic converters, O2 sensors, EGR, etc. Only change was to replace exhaust manifolds and section of exhaust pipes with headers and new pipes. - More likely if:
1. Engine compartment air flow is restricted, like in a Van or Class C RV
2. Engine is Big Block like Chevy 454, 8.1, and Ford 460, bigger parts amplify the expansion differences between the heavy head and the light manifold. Ford V10 too, it's a small block but the extra cylinder on each side makes it another "long" engine.
3. It's working hard, Motorhome or Towing. I wouldn't expect daily drivers or lightly loaded RV applications to have the problems a large Class C might. - A Google search shows it to be a fairly common issue, along with broken manifold bolts.
- 75,000 on our '04 workhorse and no problem.
