Gurgling noise in heater housing - AF01.30-P-1000AG

ENGINE 113.##### up to 286599 in MODEL 129, 163, 202, 208, 210, 215, 220 

ENGINE 113.### ## up to 286599 in MODEL 463 

Damage code	Cause	Remedy
01 243 B2	Heater return duct in cylinder head clogged with casting crust	Before working on the cooling system, coolant pump, heater housing, etc.:↓
		1 Remove left cylinder head
		ENGINE 113 in MODEL 210, 208, 202, 129	AR01.30-P-5800B
		ENGINE 113 in MODEL 220	AR01.30-P-5800BA
		ENGINE 112.945, 113.962 in MODEL 463	AR01.30-P-5800GV
		ENGINE 113.942 in MODEL 163.172 ENGINE 113.981 in MODEL 163.174	AR01.30-P-5800MV
		2 Check coolant duct, if necessary, remove possible casting crust As of engine end number 285600 (as of beginning of 01/2001) there is no casting crust at this point.

Fig 1: Locating Casting Crust In Cooling Duct