Help With 1968 OAI W30 Air Cleaner Vacuum Line Routing
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From: Ft. Wayne, IN
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Its probably shown in the assembly manual. There should be one hose from the manifold to one side of the thermostatic switch, then a hose from the other side of the thermostatic switch to a "T", then each side of the "T" should have a hose going to each of the 2 vacuum motors on the snorkels. There might be a clip on the underside of the air cleaner to hold the hoses going into the thermostatic switch.
Its probably shown in the assembly manual. There should be one hose from the manifold to one side of the thermostatic switch, then a hose from the other side of the thermostatic switch to a "T", then each side of the "T" should have a hose going to each of the 2 vacuum motors on the snorkels. There might be a clip on the underside of the air cleaner to hold the hoses going into the thermostatic switch.
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From: Rosemount, MN
Thanks for the reply’s. i have not been able to find the information in the assembly manual. Maybe my old printed version is missing a page. I can can find where the air cleaner and such are shown but there is no detail on how the vacuum hoses should be properly routed. I assumed maybe a tee or something but wasn’t sure. Does anyone have a picture maybe. Thanks Tim.
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Posts: 12,655
From: Evansville, IN
So a theory of operation question, these were vacuum motors that would pull the doors shut under vacuum and spring open with no vacuum and they had vacuum when the engine was not warm enough to shut off the vacuum at the choke's thermostatic switch. Idea is to have OAI when engine is warm, and exhaust chimney air when not. I assume, if you buried it while cold, you'd temporarily lose vacuum and get OAI that way.
Now the 70-72 OAI had a flapper that was purely off engine vacuum from manifold, and you'd get OAI at low vacuum, ie, burying it, regardless of engine temp.
Are both of those correct theory?
Now the 70-72 OAI had a flapper that was purely off engine vacuum from manifold, and you'd get OAI at low vacuum, ie, burying it, regardless of engine temp.
Are both of those correct theory?
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