Volvo C30 2007 Service And Repair Manual page 507

Fig. 127: Clamping Snap Ring By Compressing Groove
Courtesy of VOLVO CARS CORPORATION
Install the pipe.
Clamp the snap ring by compressing the groove. See the illustration.
Press in the pipes. Adjust the pipes so that they are positioned according to previous markings.
Press down the cover fully. Install the 4 screws. Tighten.
HINT: Lubricate the O-rings for the pipes so that they can be inserted more easily into the openings in
the heater exchanger.
Install:
the engine coolant hose(s) on the pipe coupling(s) on the engine coolant heater so that they are positioned

according to the previous markings
the engine coolant heater. See: FUEL FIRED BOOSTER HEATER (B5254T3, B5254T7)

FINISHING
TESTING THE ENGINE COOLANT HEATER
2012 Volvo C30 T-5
HVAC Climate Units - Removal, Replacement And Installation