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Home >> BMW >> 2000 >> 740i >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> COOLING SYSTEM - REPAIR INSTRUCTIONS - 740i & 740iL - E38 >> Coolant, checking coolant >> 17 00 009 Checking cooling system for water leaks >> Checking pressure relief valve in cap:

Checking pressure relief valve in cap:

Detach rubber (1) from hand pump.

Attach special tool 17 0 007 / 17 0 008.

Fig 1: Detaching Rubber From Hand Pump And Attach Special Tool 17 0 007 / 17 0 008
G03225400

Screw cap (1) onto special tool.

Build up pressure with special tool (hand pump) 17 0 002; observe pressure gauge to ascertain when opening pressure is achieved.

Compare opening pressure of pressure relief valve. Refer to 17 11 RADIATOR AND MOUNTING PARTS E38 / M62 .

Fig 2: Screwing Cap (1) Onto Special Tool
G03225401
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