Replacing catalytic converter after 700 miles

[itsmekylep]

Knock on wood, I haven't had any issues, but if I have a major issue & the truck gets bought back I'll order another one, so dang nice I don't want to go back to my tacoma for a daily!

I don't want out of it either. I'd love to keep it. If it comes down to it, I'll ask them to find me one with a level 1 package this time.

 

[frogjbm]

I do not think so but it does have 2 catalytic temp sensors. I bought a Banks iDash Pro and I was able to monitor the temps.
I have noticed the temps range between 900 and 1700 degrees when you hammer the fun pedal. They do go back down pretty quick. On a 100 mile loop at 80mph they hovered around 1400 degrees.
In contrast my 3500 with the high output diesel runs about 600 degrees at the egt sensor and up 900 when it does a regen. Obviously different engines and temps are taken at different points.

1400 degrees is too hot does anyone else disagree? If so, please articulate.

 

[itsmekylep]

1400 degrees is too hot does anyone else disagree? If so, please articulate.

I don't really know, but that does seem high. I would have guessed around 600-1200 degrees based on some other things I've read, but maybe that's typical for these turbo engines? Hopefully someone else can measure their temps for a better baseline trend

 

[frogjbm]

I don't really know, but that does seem high. I would have guessed around 600-1200 degrees based on some other things I've read, but maybe that's typical for these turbo engines? Hopefully someone else can measure their temps for a better baseline trend

I mean 1400 just holding at 80mph seems a bit excessive IMO. If you’re under heavy acceleration, yea hitting 1600 is quite normal with a HO engine, but you’re exceeding that by 100 degrees, hovering at 1700, which is more than what a typical M3 would register. I’m kinda thinking this truck isn’t tuned properly, this should not be happening.

Is there anyone on this forum that hasn’t had cat issues and drives the absolute shit fire out of your truck? I drive my vehicles incredibly hard, always have, always will, never once had a cat melt.

 

[Power Wagon]

I mean 1400 just holding at 80mph seems a bit excessive IMO. If you’re under heavy acceleration, yea hitting 1600 is quite normal with a HO engine, but you’re exceeding that by 100 degrees, hovering at 1700, which is more than what a typical M3 would register. I’m kinda thinking this truck isn’t tuned properly, this should not be happening.

Is there anyone on this forum that hasn’t had cat issues and drives the absolute shit fire out of your truck? I drive my vehicles incredibly hard, always have, always will, never once had a cat melt.

More from Grok. Again, if interested.

I(Grok) can provide an informed response based on my knowledge of turbocharged engines, particularly the High-Output 3.0L Hurricane inline-six engine that powers the RHO, and general engineering principles for similar performance trucks. Since you’ve asked about the turbo operating temperatures, I’ll focus on that component and extrapolate from available data.

The 2025 Ram 1500 RHO is equipped with a twin-turbo 3.0L Hurricane engine, producing 540 horsepower and 521 lb-ft of torque. This engine uses two low-inertia Garrett GT2054 turbos with water-to-air intercooling, designed to handle high boost (up to 26 psi) and the demands of off-road performance. Turbo operating temperatures depend on factors like load, ambient conditions, driving style, and cooling system efficiency, so there’s no single “high” or “low” without context. However, I can estimate typical ranges based on industry standards and the RHO’s design.

Turbo Operating Temperature Lows

• Idle or Light Load: At idle or during low-throttle operation (e.g., cruising on flat terrain), exhaust gas temperatures (EGTs) entering the turbos might range from 300°F to 500°F (149°C to 260°C). The turbine housing and compressor side would stay relatively cool, likely between 150°F to 250°F (66°C to 121°C), thanks to the water-to-air intercooling and oil circulation dissipating heat. The RHO’s high-flow oil pump and cooling system are engineered to keep temperatures stable even at rest after heavy use.
• Cold Start: On startup, especially in colder climates (say, 32°F/0°C ambient), the turbos would begin near ambient temperature, gradually warming as the engine reaches operating temp. Within 5-10 minutes of light driving, they’d likely stabilize around 200°F (93°C) on the compressor side.

Turbo Operating Temperature Highs

• Peak Load (e.g., Baja Mode, Full Throttle): Under max boost—think high-speed off-roading or towing the RHO’s 8,380-lb capacity—EGTs could climb to 1,200°F to 1,500°F (649°C to 816°C) at the turbine inlet. Modern turbos, like those in the Hurricane engine, are built with materials (e.g., nickel-based alloys) to withstand up to 1,800°F (982°C) briefly, but the RHO’s cooling systems (intercoolers, oil flow) should keep sustained peaks closer to 1,300°F (704°C). The compressor side, post-intercooling, might hit 300°F to 400°F (149°C to 204°C) due to compressed air heating up under 26 psi.
• Extreme Conditions: In desert environments (e.g., 110°F/43°C ambient), prolonged high-rpm use could push EGTs toward the upper limit of safe operation—around 1,600°F (871°C)—before the engine’s ECU dials back boost or fuel to protect components. The RHO’s hood scoop and high-flow air induction are designed to mitigate this by feeding cooler air, so real-world highs likely stay below this threshold.

Cooling and Design Considerations
The RHO’s water-to-air intercoolers and robust oiling system play a big role in moderating turbo temps. Post-turbo air is cooled significantly before entering the engine, keeping intake temps in the 100°F to 150°F (38°C to 66°C) range under load, per typical intercooled setups. After shutdown, a cooldown period (1-2 minutes of idling) is standard advice for turbos to avoid heat soak, where residual heat might spike the turbine housing to 1,000°F (538°C) briefly as oil flow stops.

Why No Exact Numbers?
Ram hasn’t publicly released precise turbo temp specs for the RHO as of March 6, 2025. Manufacturers often guard such details unless they’re part of service manuals or diagnostic tools, which aren’t fully available yet for a 2025 model still rolling out (deliveries began Q3 2024). My estimates align with turbocharged truck engines like Ford’s 3.5L EcoBoost (Raptor) or GM’s 2.7L turbo, adjusted for the RHO’s higher output and off-road focus.

If you need exact highs and lows, you’d typically find them in a factory service manual or via diagnostic data from a dealership once the truck’s in wider circulation. For now, expect lows around 150°F-250°F (66°C-121°C) in light use and highs of 1,200°F-1,500°F (649°C-816°C) on the turbine side during extreme performance.

 

[frogjbm]

More from Grok. Again, if interested.

I can provide an informed response based on my knowledge of turbocharged engines, particularly the High-Output 3.0L Hurricane inline-six engine that powers the RHO, and general engineering principles for similar performance trucks. Since you’ve asked about the turbo operating temperatures, I’ll focus on that component and extrapolate from available data.

The 2025 Ram 1500 RHO is equipped with a twin-turbo 3.0L Hurricane engine, producing 540 horsepower and 521 lb-ft of torque. This engine uses two low-inertia Garrett GT2054 turbos with water-to-air intercooling, designed to handle high boost (up to 26 psi) and the demands of off-road performance. Turbo operating temperatures depend on factors like load, ambient conditions, driving style, and cooling system efficiency, so there’s no single “high” or “low” without context. However, I can estimate typical ranges based on industry standards and the RHO’s design.

Turbo Operating Temperature Lows

• Idle or Light Load: At idle or during low-throttle operation (e.g., cruising on flat terrain), exhaust gas temperatures (EGTs) entering the turbos might range from 300°F to 500°F (149°C to 260°C). The turbine housing and compressor side would stay relatively cool, likely between 150°F to 250°F (66°C to 121°C), thanks to the water-to-air intercooling and oil circulation dissipating heat. The RHO’s high-flow oil pump and cooling system are engineered to keep temperatures stable even at rest after heavy use.
• Cold Start: On startup, especially in colder climates (say, 32°F/0°C ambient), the turbos would begin near ambient temperature, gradually warming as the engine reaches operating temp. Within 5-10 minutes of light driving, they’d likely stabilize around 200°F (93°C) on the compressor side.

Turbo Operating Temperature Highs

• Peak Load (e.g., Baja Mode, Full Throttle): Under max boost—think high-speed off-roading or towing the RHO’s 8,380-lb capacity—EGTs could climb to 1,200°F to 1,500°F (649°C to 816°C) at the turbine inlet. Modern turbos, like those in the Hurricane engine, are built with materials (e.g., nickel-based alloys) to withstand up to 1,800°F (982°C) briefly, but the RHO’s cooling systems (intercoolers, oil flow) should keep sustained peaks closer to 1,300°F (704°C). The compressor side, post-intercooling, might hit 300°F to 400°F (149°C to 204°C) due to compressed air heating up under 26 psi.
• Extreme Conditions: In desert environments (e.g., 110°F/43°C ambient), prolonged high-rpm use could push EGTs toward the upper limit of safe operation—around 1,600°F (871°C)—before the engine’s ECU dials back boost or fuel to protect components. The RHO’s hood scoop and high-flow air induction are designed to mitigate this by feeding cooler air, so real-world highs likely stay below this threshold.

Cooling and Design Considerations
The RHO’s water-to-air intercoolers and robust oiling system play a big role in moderating turbo temps. Post-turbo air is cooled significantly before entering the engine, keeping intake temps in the 100°F to 150°F (38°C to 66°C) range under load, per typical intercooled setups. After shutdown, a cooldown period (1-2 minutes of idling) is standard advice for turbos to avoid heat soak, where residual heat might spike the turbine housing to 1,000°F (538°C) briefly as oil flow stops.

Why No Exact Numbers?
Ram hasn’t publicly released precise turbo temp specs for the RHO as of March 6, 2025. Manufacturers often guard such details unless they’re part of service manuals or diagnostic tools, which aren’t fully available yet for a 2025 model still rolling out (deliveries began Q3 2024). My estimates align with turbocharged truck engines like Ford’s 3.5L EcoBoost (Raptor) or GM’s 2.7L turbo, adjusted for the RHO’s higher output and off-road focus.

If you need exact highs and lows, you’d typically find them in a factory service manual or via diagnostic data from a dealership once the truck’s in wider circulation. For now, expect lows around 150°F-250°F (66°C-121°C) in light use and highs of 1,200°F-1,500°F (649°C-816°C) on the turbine side during extreme performance.

Thank you for such excellent feedback!

So I would be curious what the temps were for those that had melted cats, based on what you provided in the aforementioned post, I would assume around or above 1800 degrees for a prolonged time.

Stupid question, but based on placement, do the RHO cats have enough airflow to help maintain the cooling effect?

 

[Jeffhallphotos]

Well, looks like I’m not getting it back today and looks like Monday

 

[Jeffhallphotos]

I'm waiting on the same answer. Will be interesting to see both offers

Have you heard anything yet? I will hear from them on Monday

 

[itsmekylep]

Have you heard anything yet? I will hear from them on Monday

Got my truck back yesterday. So far so good. Their first offer was to pay my first payment and give me a 8 year 85,000 mile max care warranty. I requested the 8 year 125,000 mile warranty. They’re going to also reach back out to me on Monday. They keep saying “compensation” like they will also cut me. Check but I’m not sure what they really mean.

 

[frogjbm]

Got my truck back yesterday. So far so good. Their first offer was to pay my first payment and give me a 8 year 85,000 mile max care warranty. I requested the 8 year 125,000 mile warranty. They’re going to also reach back out to me on Monday. They keep saying “compensation” like they will also cut me. Check but I’m not sure what they really mean.

They should pay your first or maybe even second payment, give you the warranty term you mentioned, and some pain and suffering “please don’t sue us” money in the amount of a minimum 5k, hell make it 10k.

 

[RamFan]

Take the warranty at your parameters. I requested a lifetime warranty (when it was available) for our Durango. And they honored it. Don’t get me wrong, I loved our ‘16 but there were some questionable build issues.

Chris

 

[RamFan]

@frogjbm .. as you can tell it’s not my first rodeo with the Pentastar…but the overall satisfaction hasn’t kept me away.

 

[Jeffhallphotos]

Got my truck back yesterday. So far so good. Their first offer was to pay my first payment and give me a 8 year 85,000 mile max care warranty. I requested the 8 year 125,000 mile warranty. They’re going to also reach back out to me on Monday. They keep saying “compensation” like they will also cut me. Check but I’m not sure what they really mean.

Yeah, she was telling me the same thing. That if they don’t buy it back, then they would compensate me for a whole bunch of things so I’m hoping to know what’s going to happen on Monday. It will be an added bonus that I don’t have my truck yet since she told me I would get it back on Friday

 

[frogjbm]

@frogjbm .. as you can tell it’s not my first rodeo with the Pentastar…but the overall satisfaction hasn’t kept me away.

View attachment 8270

Oh damn the OG!! Nice brother

 

[itsmekylep]

Yeah, she was telling me the same thing. That if they don’t buy it back, then they would compensate me for a whole bunch of things so I’m hoping to know what’s going to happen on Monday. It will be an added bonus that I don’t have my truck yet since she told me I would get it back on Friday

Oh, that's good. It's nice to compare because I have no idea what is acceptable or what I can even request outside of an extended warranty and payment compensation.