My '72 has the stock oil bath air cleaner. I have a '73 paper element filter coming to replace it. The oil bath has an induction preheating valve on it but from the picture I dont think the '73 has such an animal. Is this finessing with induction air necessary? Or was this an attempt by VW/Porsche to start to clean up emissions? And finally if it is not necessary I suppose that I can just plug the vacum line that controlled the hot/cold/hot/cold flap and have one less vacum line to watch?
Thanks guys.
Plug the vacuum line, ditch the pre-heat. It was only used on 1972 914s, and I'm not even sure that most of those were originally hooked up anyway...
--DD
I did this switch on my 72 and never missed the preheated air intake. I live in cold country and never missed it at all. My only concern was that I needed to block off the tube so that there wasn't a warm air inlet into the engine compartment.
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