Community Forums

Daveinet · 05-08-2025, 07:20 AM

A potential buyer of a 2007 Intrigue. From everything I've read, it seemed the Intrigues always had the C13 525 HP engine, however I just stumbled on a post that stated someone had one with a 400HP Cummings.
If it is a CAT, will it always be a C13 525 HP, or could it be a C7/C9? Can we tell from this photo?

Also being 2007, do we know if this is a 2006 motor? Or is it a 2007? I understand from 2007 on, they were playing with emissions stuff before they finally went to DEF. I know it doesn't have DEF, but does it have other changes from the 2006 model? How would I know?

Anything else CC specific to look for? Its a 42 footer. I've heard it mentioned anything from 2005 and later have an aluminum radiator that tends to corrode and fail. Is this common or only in salt environments?

d23haynes57 · 05-08-2025, 07:35 AM

Quote:

Originally Posted by Daveinet

A potential buyer of a 2007 Intrigue. From everything I've read, it seemed the Intrigues always had the C13 525 HP engine, however I just stumbled on a post that stated someone had one with a 400HP Cummings.
If it is a CAT, will it always be a C13 525 HP, or could it be a C7/C9? Can we tell from this photo?

Also being 2007, do we know if this is a 2006 motor? Or is it a 2007? I understand from 2007 on, they were playing with emissions stuff before they finally went to DEF. I know it doesn't have DEF, but does it have other changes from the 2006 model? How would I know?

Anything else CC specific to look for? Its a 42 footer. I've heard it mentioned anything from 2005 and later have an aluminum radiator that tends to corrode and fail. Is this common or only in salt environments?

Cat never went to DEF. Thier approach was combustion control, ACERT, not after treatment. When they realized that the engines could not meet the upcoming standards, they left the on-road business. It is hard to tell in the picture, it looks like the C13, 525 HP. The C9 were also common in the smaller rigs. They also used some Cummins ISC and ISM. The ISX and C15 were only used in the Rhapsody, Affinity, and Magna.

wolfe10 · 05-08-2025, 07:42 AM

Yellow engine= Caterpillar.

Ridered928 · 05-08-2025, 08:34 AM

the stickers on the back of the motor have the engine info

David 70 · 05-08-2025, 09:04 AM

What does that sticker/plate say on the auxiliary drive cover say? I can't read it in the picture.

Daveinet · 05-08-2025, 09:28 AM

I didn't word my question well in that I knew it was CAT, but did not know the visual difference between a C9 and a C13. I didn't know if a C9 was every offered with an Intrigue. If we assume it is a C13, will it state that if is an ACERT engine?

I assume if it is a C9S, that would be a bad thing? C9 OK, C9S is not OK?

d23haynes57 · 05-08-2025, 09:42 AM

Quote:

Originally Posted by Daveinet

I didn't word my question well in that I knew it was CAT, but did not know the visual difference between a C9 and a C13. I didn't know if a C9 was every offered with an Intrigue. If we assume it is a C13, will it state that if is an ACERT engine?

I assume if it is a C9S, that would be a bad thing? C9 OK, C9S is not OK?

I am fairly sure that if it is called a "C#" it is and ACERT based engine. HEUI fuel injectors. The "C7" was the baby as the updated 3126 series, and the only engine to still have the parent bore block construction. Except possibly for the ISM-450 or 500 I would take any of the Cat "C9" and larger engines any day and pay more to get one.

dons2346 · 05-08-2025, 09:43 AM

Look in the medicine cabinet. On one of the doors, there should be a sticker with all components installed on/in that coach with model numbers and serial numbers. Look for the motor and call Cat with the serial number for the correct info.
The sticker might be in the closet

JohnM13 · 05-21-2025, 12:59 PM

Quote:

Originally Posted by Daveinet

A potential buyer of a 2007 Intrigue. From everything I've read, it seemed the Intrigues always had the C13 525 HP engine, however I just stumbled on a post that stated someone had one with a 400HP Cummings.
If it is a CAT, will it always be a C13 525 HP, or could it be a C7/C9? Can we tell from this photo?

Also being 2007, do we know if this is a 2006 motor? Or is it a 2007? I understand from 2007 on, they were playing with emissions stuff before they finally went to DEF. I know it doesn't have DEF, but does it have other changes from the 2006 model? How would I know?

Anything else CC specific to look for? Its a 42 footer. I've heard it mentioned anything from 2005 and later have an aluminum radiator that tends to corrode and fail. Is this common or only in salt environments?

The 2007 Intrigue had 2 engine options. The 400 hp Cummins was the "standard" engine. The 525 hp CAT C-13 was the "upgrade". In order to tell which CAT engine you have to check the serial # (on engine or in medicine cabinet). If the serial # starts with KCB it is pre-def pre-acert. If the serial # starts with LEE it is the ACERT engine. Just FYI, I own a 2008 Intrigue #12263 with the #LEE CAT-C13, just turned 101,000 miles and (knock on wood) no real issues.

Daveinet · 05-21-2025, 01:48 PM

Thanks
Just looked at 3 different CC's in 3 days. What a whirlwind tour. Something I noticed is we were sitting about 7 ft from the exhaust, engine idling and the pipe aiming right at us. I could not smell any diesel burn smell at all. Those C13 seemed to burn very clean. However I also looked at a coach with a 600 hp Cummins. We were inside the coach while it was idling and noticed some diesel smell. It wasn't terrible, but definitely there and somewhat annoying. Is that typical, or did I just stumble on a Cummins that may have had some issues? All coaches were of 2006-07 versions.

d23haynes57 · 05-21-2025, 05:05 PM

Caterpillar went the route of advanced combustion controls, (ACERT) instead of exhaust after treatment. Most everything 2004 and later is an ACERT engine. If it has the HEUI injectors it is an ACERT. Intake valve control and the advanced fuel delivery was the plan. When it was apparent that they would not be able to meet the NOx reduction requirements without DEF they left the on-road business. Unlike Cummins no one stockpiled the engines looking to use them in future years. I had a 2004 C7 and yes, rarely did you smell it, or see visible smoke or soot.
The Cummins engines still used cam operated injectors and used the EGR and variable gate turbo to control air flow and mix inert exhaust gas to reduce NOx emissions. I now have a 2008 with the Cummins ISM 500. Anyone who follows me in another vehicle informs me how much the exhaust stinks, and the soot production is there every time the throttle in pushed, waiting the turbo boost to come back.