Located in the air intake filter box is a auxiliary thermostat. Made out of plastic, so over time (decades) it becomes brittle and it's two hose fittings tend to crack at the base and brake off. Either scenario is highly undesirable, as it sure will cause leak in the cooling system with following overheating, etc.

I do all my car repair at TechShop, Menlo Park (http://www.techshop.ws/), conveniently located just a few blocks from my house. They have a nice car port with plenty of heavy duty car tools.

Step 1: Getting the Parts

When initially confronted with the problem of getting the right part, you get mad at the fact, that this little part is sold by BMW dealerships for over a hundred bucks. You'll find plenty of forum posts on the web, where people just recommend bypassing the thermostat all together. Instead of doing that, I'd recommend getting it from an OEM supplier, same exact part made by Wahler for BMW production line sold at around $50 at PelicanParts.com.
you cant cap those off close to the motor ? <br>
<p>I've seen people do that, but never felt good about making &quot;shortcut&quot; modifications to the engine. I guess, german engineers put it there for purpose.</p>

About This Instructable




More by Doctor Jazz:Replace auxiliary thermostat in BMW E34 Replace air intake rubber boot on BMW M50 engines (E34) Weather-proofing your DSLR camera for cheap. 
Add instructable to: