Overview 3912145CN Cummins Heat Exchanger  

Offered is our replacement for the 3912145CN Cummins Heat Exchanger - 6 Cylinder "C" Series. This part is 5" Diameter x 27" long.  3912145 and 3912145CN are the same part for us as we make all of these heat exchangers with Copper Nickel bundles to extend their life.   We do not recommend copper bundles be used for this part and therefore do not offer that option. 

This part is made with OEM equivalent materials and is guaranteed for fit and function.   It also comes with a 2 year warranty against manufacturing defects.

Some details to note:   

• Please note that there are 2 different heat exchangers for this engine model. Please review dimensions.
• Its sister part 3897168CN has a different orientation for in and out raw water connections.   Seawater connections are 1.75 inches in size.
• We have provided a diagram to help identify the model needed for your “B” Series Cummins Diesel (Matrix is located under photos for this heat exchanger. It is the last picture on the left of the main photo).

Our product is a drop in replacement for these part numbers:

• Cummins:
• 3912145
• 3912145CN
• 4058308
• 4058308CN
• 9656-1-7

This part fits the following engines (possibly more):

• C GAS PLUS CM556, QSL9 CM2250 L115, ISC CM2150, QSL9.3 CM2880 L113, ISL8.9 CM2150 L110, QSL9 CM2350 L118, ISC8.3 CM2250, ISL G CM2180, QSL9 CM2250, QSL9 M CM2250 L106, QSC8.3 CM554, ISL9 CM2250, ISL9 CM2350 L111, QSL9 CM554, G8.3 CM558, G8.3, ISL9 CM2350 L101, L9.3 L105, QSL9 CM850, L8.9, QSL9 G CM558, ISC CM554, QSC8.3 CM2250, QSL9 CM2350 L107, ISC CM850, ISL CM554, ISLE4 CM850, QSL9 CM2350 L102, ISL8.9 CM2880 L112, 6C8.3, GTA8.3 CM558, L GAS PLUS CM556, QSC8.3 CM850, ISL CM2150, ISL9 CM2150 SN, ISL CM850, QSM11 Engine