5ek sis lookup help

Hello Preston: Have a '97 West Star with a 5EK. Overall it has been a good motor. It is used hard. Truck rarely grosses less than 100K lbs and goes up considerably from there. At 706K it dropped rear liner. Motor was overhauled. As many have said here, keep Cat out of your ECM. Apparently it is mandatory that ecm is "upgraded" to low emission files. You will be disappointed with new ecm. Do a search, alot has been posted on this. Mr. Haney is very generous with information and has the cure to most of these puter problems. Best wishes...

 

This serial number left CAT as a 455Hp at 1800 RPM to Peterbilt.

To have been able to uprate to a 500, the injectors and turbo would have had to been upgraded during the rebuild. I can't look this up to see if it had been done or not.

 

It could have been uprated to a 475 Hp with the smaller 455 Hp injectors in it with only doing a turbo upgrade at the time of the rebuild. The 455 and 475 use the same injector from the factory. The RPM listed in CAT SIS is where the peak power is, not the RPM limit. I would expect it to turn 2100 without any problem, unless it was set back for fleet purposes.

With the bigger injectors you could have many different part numbers over the years. These are the part numbers you'll be looking for the 500 or 550 ratings.


118-9035, 0R-4893, 10R-2780, 0R-9258, 10R-0958, 10R8502

The 550 Hp turbo could be many different part numbers also through the years......I don't have all the numbers for these. Here's some possible numbers

124-3759, 126-9920, 132-3649,0R-6690

The 500 Hp engine would have had a different turbo, I don't have any of these part numbers

With this ECM you can flash it with many different files to achieve the Hp you want.

I'll send you a PM with my contact info to discuss how and what can be done. Even with the small injectors there are ways to break the 600 Hp level with ECM tweaks.

 

Last service record with Cat is from 2006, when it had a valve adjustment. No horsepower increases by Cat.

 

Hi. Mr. Haney I have a 1995 Peterbilt 379 with a 3406e 5ek17859 just want to get info on it can’t seem to find nothing. Feel free to email me rocksolid4088@aol.com