Overview 3866719 Cummins Heat Exchanger

Offered is our replacement for the 3866719 Cummins Heat Exchanger - 6 Cylinder "B" Series. This part is 4" Diameter x 25-3/4" long.  It comes standard with a copper nickel (CUNI) bundle.  This part is made with OEM equivalent materials and is guaranteed for fit and function.

Some details to note:

• Please note that there are 3 different heat exchangers for this engine model. Please review dimensions.
• This Heat exchanger has 1-1/4” hose connections for water connections. This sets it apart from its sister parts.
• Its sister part 3910583CN & 4020101CN have different sized hose connections for in and out water ports.
• We have provide a matrix 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:
• 3914642
• 3914642CN
• 3866719
• 3866719CN
• 4019958
• 4019958CN
• 9778-1-7
• 9778-2-7

This part fits the following engines (possibly more):

• QSB6.7 CM2250 EC, ISBE CM2150, ISD4.5 CM2150, 4B3.9, QSF2.8 CM2880 F114, QSB6.7 M CM2250, ISF3.8 CM2220 F103, QSB4.5 CM2150 B108, ISB5.9G CM2180, QSB6.7 CM2350 B130, ISF3.8 CM2220 F116, G5.9, ISF3.8 CM2220 AN, ISB6.7 CM2250, B4.5 RGT, ISBE CM800, QSB3.9 30 CM550, QSB7 CM2880 B117, QSB5.9 30 CM550, ISF2.8 CM2220 F101, QSB6.7 CM2150 B109, G3.9, QSF2.8 CM2880 F108, QSG12 CM2350 G110, ISG12 CM2880 G107, ISG11 CM2880 G108, ISG12 CM2880 G109, QSB6.7 CM2350 B112, B5.9 G, ISF2.8 CM2220 EC, ISF3.8 CM2220 IAN, ISB (CHRYSLER), ISB6.7 CM2350 B103, B6.7S, QSB7-DM CM850, ISB6.7 CM2350 B101, QSB6.7 CM2880 B116, ISF3.8 CM2350 F109, QSB6.7 CM2350 B105, QSB6.7 CM2250, B5.9 LPG, ISB CM850, ISBE4 CM850, ISB/ISD4.5 CM2150 SN, ISF3.8 CM2220, B4.5, ISB CM2150, QSF3.8 CM2880 F112, QSF2.8 CM2880 F104, ISF2.8 CM2220 AN, QSB6.7 CM850, QSB5.9 CM2880 B115, QSB6.7 CM2250 B128, ISF2.8 CM2220 ECF2, B4.5S, QSB4.5 CM2350 B122, ISF2.8 CM2220 F117, B6.7 G CMOH6.0 B125, G5.9 CM558, ISB/ISD6.7 CM2150 SN, ISB6.7 CM2150 SQ, 6B5.9, ISF2.8 CM2220 IAN, ISB6.7 2013 DCX CHASSIS CAB, ISB4.5 CM2150, QSB4.5 30 CM550, ISB3.9 CM2220 B107, ISB6.7 2010 DCX PICKUP, ISB/ISD6.7 CM2880 B126, B5.9 GAS PLUS CM556, QSB5.9 CM850, ISB CM550, ISF2.8 CM2220, QSB4.5 CM2350 B106, ISG11 CM2880 G106, ISB/ISD6.7 CM2150 B120, QSB4.5 CM850, F3.8 F102, QSB5.9 44 CM550, QSB4.5 CM2250 EC, B5.9 LPG PLUS CM556, QSF2.8 CM2880 F105, B GAS INTERNATIONAL CM556, QSF3.8 CM2350 F119, QSF3.8 CM2350 F107, ISF3.8 CM2220 F110, ISB/ISD4.5 CM2150 B119, ISG12 G CMOH6.0 G111