1984 BMW 633 csi s first start difficult

EKRALC59

MEMBER
1984 BMW 633 CSI
6 CYL
2WD
MANUAL
150,000 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.

Monday, March 1st, 2010 AT 7:26 AM

1 Reply

DOCHAGERTY

MECHANIC
9,601 POSTS

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.