1977 to 1985 Diesel Fuel Shut Off Inspection and Switch Protection Filter

Connect this small filter with attached hoses to the back of the injection pump and to the brown plastic vacuum line going to your ignition switch under the dash. The filter will do two things. 1. Help to trap oil coming out of a leaking shutoff valve before it gets to your ignition switch. 2. Let you know when your vacuum shutoff valve has developed an oil leak. The tight fitting high quality vacuum hose will prevent it from falling off the filter. We include a spare filter if and when the first one gets contaminated with engine oil.