This document is installation step of cold-start system test for 1985 Mercedes Benz 380SE (126 Chassis) V8-3839cc 3.8L SOHC (116)
Special Tools: Valve Tester, Bosch KDJE-P 400 – 904 589 00 21 00 Connective line, cold-start valve to tester – 117 070 28 32 Connecting fitting, connecting line to tester – 915006 004002 Safety plug for ignition system – 102 589 02 21 00 Conventional Tools Digital multimeter (volt-ohmmeter) – e.g. Sun Electric DMM-5 Tachometer – e.g. Sun Electric
Test
Disconnect electrical plug from warm-up compensator and from cold-start valve. Testing The Thermo-time Switch
NOTE: The cold-start valve is opened via the thermo-time switch at coolant temperatures below 15°C (59°F) . The operating time increases with decreasing temperatures and attains 12 seconds at (-)20°c (-4°F) . The opening time of the cold-start valve increases with decreasing temperatures by approximately 1.5 seconds for every 5°C (9°F) . ^ e.g. 15°C (59°F) = 0 seconds 10°C (50°F) = 1.5 seconds A. Testing The Thermo-time Switch Below 15°C (59°F) Coolant Temperature.

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