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1984 BMW 633 csi Repair Question


Topics covered: Engine, Engine performance, Performance.
Mileage: No information provided.

Asked on March 1, 2010

1984 BMW 633 csi s first start difficult

Engine Performance problem
1984 BMW 633 csi s 6 cyl Two Wheel Drive Manual 150000 miles

I am having trouble to start car when it sits over night it takes three to four extended cranks to start, once it startes it runs fine and starts normally after the first start.
Avatar Asked by ekralc59

Answer

Replied on March 1, 2010

The cold start circuit is possibly not working. It is composed of a cold start valve and a thermal/time switch that is in the thermostat housing. Guessing from cyberspace would be starting with the switch, they are usually the easiest to eliminate from the equation. If bypassing the switch allows power to reach the cold start valve, the repair is quite straight forward.

Tiny Answered by Dr. Hagerty (expert)
9,669 answers provided