You should probably replace it. It is known as a vacuum change over valve. Fastlane should carry it, but if not, the guy I always buy parts from, www.*************** has them for sure. Approx $35 give or take. $75 orders get free shipping........And he's a little cheaper than Fastlane too.......

I also have some used ones I might let go......Give me an offer and I'll consider it if you're interested....

__________________
-Matt

EPA Section 609 Certified MVAC Technician
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Oil Burner Kartel Member #10

Ahh the smell of Diesel Fuel, it's like coffee in the morning!

My Car:

1982 300SD Turbo Diesel (231,500 miles!) RIP

1984 300SD Turbo Diesel Custom (235,500 mi on driveline.) - On Road!!

www.icsrepair.com