M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: pierre02ti on February 23, 2013, 07:37:40 AM

Title: Diagram to connect additional thermostat 318is 1991
Post by: pierre02ti on February 23, 2013, 07:37:40 AM

Putting back engine in place, was not careful enough to identify where each hose was connected.  This additional thermostat is not on the regular diagram I found.

Where do the hoses connect? Diagram?

http://realoem.com/bmw/diagrams/e/e/20.png

Thanks

Pierre

Title: Diagram to connect additional thermostat 318is 1991
Post by: DesktopDave on February 23, 2013, 08:06:52 AM

You know, I don't recall.  That's the upgraded system - it's designed to protect the heater core from high pressure in case the expansion tank fails.  I'll take a look downstairs or snap a picture later on today.

IIRC hose #9 comes from the rear cylinder head, hose #6 goes to the upper heater valve on the firewall.  Part #20 was spliced into the return hose from the lower heater valve.