MTU Detroit Diesel 183 Series Technical Publication page 553

Task Description
20080/1 E 98-12
Installation
Check sealing and mating faces.
Grease new O-rings with petroleum jelly and insert in
coolant distributor housing.
Insert thermostat elements, with ventilation notches
facing upwards, into coolant distributor housing.
Install thermostat housing with hex screws.
Group 20
Subgroup 2470a
Page 3