lms1943 Report post Posted August 26, 2015 How may I determine which Caterpillar 3126 engine I have in my 2001 Airstream XC360. 3126, 3126B or 3126E Share this post Link to post Share on other sites
wolfe10 Report post Posted August 26, 2015 Call the Caterpillar RV Engine Hotline with your engine serial number: 877 777-3126. We could speculate, but engine production date, not chassis or coach date determine what the engine is. Share this post Link to post Share on other sites
lmsooter Report post Posted August 26, 2015 I was thinking the Airstream was on a Freightliner chassis but when I looked it up, the earliest model I found was 2002. http://freightlinerchassis.com/component/option,com_servicecenters/controller,oem/oem,Airstream/view,oemprint/ Maybe the above link will get you started. As Brett said, call Cat with your serial number to get accurate information. Share this post Link to post Share on other sites
