Exhaust Manifold Leak

[kapinallinen2]

Can you throw the link to the TSB ?

Yes, the TSB calls for AA but the AA is the manifold itself. Latest TSB that I have is 09-011-22. Date Sep. 3 2022.
AB is the manifold, gasket, bolts and a heat-shield that makes up the kit.

 

[dan_osms.io]

Thanks brother. How is yours holding up? No more leaks?

 

[dan_osms.io]

Here is the Service Bulletin for those that wander... but aren't lost

 

[dan_osms.io]

Also curious if running a LTH setup would get the "toasty" bits away from the last cylinder on each side, pushing the cats further downstream would assist. I live in a state where there is strict emissions rules, I wonder if a high-flow would pass. I do NOT live in California which is ... by all accounts the most stringent of the states.

2019-23 Ram Long Tube Header Kit

stainlessworks.net

 

[kapinallinen2]

Thanks brother. How is yours holding up? No more leaks?

Too early to tell, replaced it not too long ago.

 

[dan_osms.io]

Did you install it @kapinallinen2 ?

 

[kapinallinen2]

Did you install it @kapinallinen2 ?

Yes, about a month ago.

 

[Bt10]

Also curious if running a LTH setup would get the "toasty" bits away from the last cylinder on each side, pushing the cats further downstream would assist. I live in a state where there is strict emissions rules, I wonder if a high-flow would pass. I do NOT live in California which is ... by all accounts the most stringent of the states.

2019-23 Ram Long Tube Header Kit

stainlessworks.net

The distance from the cylinder to the cat is what sets the length of time to light off, along with lean tuning, a "regulated" time. Going to long tube both increases the distance and gives more surface area for the gas to cool. Ceramic coating may help with that. Long tubes will never pass a visual check of course. Post pics if you go thru with it.

 

[dan_osms.io]

I was talking to @My1stHemi about his constant work on the headers. He mentioned LTB, then I thought on it a bit. Looking at the collection point on OEM the distance to the block. It's pretty tight. Also from a cooling perspective that last cyl isn't getting much airflow at all. Has anyone ever ran high temp brake duct hose to the last...say 2 cylinders on each side? That and a 3d printer to fab up a distribution vane across the OEM manifold may help too. If a flange was build to take natural air plus any radiator fan provided flow could provide some power assisted cooling.

 

[dan_osms.io]

For the folks that had the TSB repair done has it solved the problem indefinitely (as far as you've been tracking mileage since fix)?

 

[Bigzway]

I just had both manifolds replaced Wednesday after waiting 4 months for the dealership to get them and it has made a huge difference on startup and driving

 

[dork17]

I just had both manifolds replaced Wednesday after waiting 4 months for the dealership to get them and it has made a huge difference on startup and driving

What sort of symptoms were you having before replacement?

 

[Bigzway]

Sounded like a ford at start (ticking)and an exhaust leak from the front of the truck driving

 

[JF19Longhorn]

Had both replaced and I'm pretty sure atleast one is leaking again, though apparently not bad enough for the dealer to find it.. and I just hit 60k yesterday.. so I'm sure they'll find it now.

 

[xjarcher]

I'm not the Original owner so I've had to buy them (thanks Stelantis) the passenger side was $96 and the Drivers was $120. This is a HUGE upgrade from my Gen 3, which I just had machined flat and reinstalled. Hopefully the "revised part" doesn't split in half. I'm inclined to think a retorque at 100 miles would be in order from the stealership. I torqued mine to spec, ate lunch and retorqued them. I noticed a few FTLBS difference. Certainly enough for a small leak like JF19 says.

 

[dearmosd]

I just purchased a 2021 2 days ago and last night upon a cold start up I heard what to me was like an exhaust leak/ticking near the driver side wheel well. I drove it for 5-10min and checked again and didnt hear anything.....

Now I read this thread and curious do I have an issue.

Question: How many generations has this manifold issue carried over through?

 

[Grape_Ape]

I just purchased a 2021 2 days ago and last night upon a cold start up I heard what to me was like an exhaust leak/ticking near the driver side wheel well. I drove it for 5-10min and checked again and didnt hear anything.....

Now I read this thread and curious do I have an issue.

Question: How many generations has this manifold issue carried over through?

Yes, you probably have the issue. I'm unsure if the 3rd gens did it but I'm assuming they may have. The 4th gens definitely did it. They would break the bolts more often than crack the manifold. Now they've strengthened the bolts but the manifolds crack.

 

[adtraylor]

Here is the Service Bulletin for those that wander... but aren't lost

This TSB is dated 2011. Is that correct?

 

[6of36]

I just purchased a 2021 2 days ago and last night upon a cold start up I heard what to me was like an exhaust leak/ticking near the driver side wheel well. I drove it for 5-10min and checked again and didnt hear anything.....

Now I read this thread and curious do I have an issue.

Question: How many generations has this manifold issue carried over through?

2009 they redesigned the heads, and looking at the TSB posted above, it relates to 2009. I imagine all Eagle head Hemis have the problem, either the early ones snapping the bolts, and the later ones cracking the manifolds, being they changed the studs, and added the reinforcement bars. Just recently they redesigned the manifolds.

 

[Bt10]

Had both replaced and I'm pretty sure atleast one is leaking again, though apparently not bad enough for the dealer to find it.. and I just hit 60k yesterday.. so I'm sure they'll find it now.

I just hit 60k as well. I had both replaced a year ago, at 28k miles, and one side is leaking again. I have $100 deductible warranty thru 100k.