charlie1942lc Posted January 25, 2013 Share Posted January 25, 2013 can anyone tell me the purpose of the 1/2" diameter hole on the left rear of the intake manifold between the last two bolt holes ? i have not been able to figure it out. Link to comment Share on other sites More sharing options...
Guest zazothex Posted January 26, 2013 Share Posted January 26, 2013 You mean the hole for the oil float indicator? Link to comment Share on other sites More sharing options...
Waldren Posted January 26, 2013 Share Posted January 26, 2013 It sounds like the return pipe from the air cleaner not in the photo above but there is a 1/2 pipe rthat runs from the air cleaner to the intake on my V-12 air cleaner. Lee Waldren Ft. Myers, Fl. Link to comment Share on other sites More sharing options...
Guest zazothex Posted January 26, 2013 Share Posted January 26, 2013 ahh. good call. I agree Link to comment Share on other sites More sharing options...
charlie1942lc Posted January 28, 2013 Author Share Posted January 28, 2013 It sounds like the return pipe from the air cleaner not in the photo above but there is a 1/2 pipe rthat runs from the air cleaner to the intake on my V-12 air cleaner. Lee Waldren Ft. Myers, Fl.thank you, guess i will just plug it up as i am running 3/ 2bbl. carbs. with small air cleaners. charlie1942lc Link to comment Share on other sites More sharing options...
peecher Posted January 29, 2013 Share Posted January 29, 2013 You should probably try to find a way to utilize the vent. Had a similar situation with a dual carb sit up and was able to use a vent (hose) to one of the air cleaners. You might be able to install a PCV system between the vent hole and the base of the center carb? A "working" vent will eliminate blowby, help remove sludge and keep the fumes out of the cab. Link to comment Share on other sites More sharing options...
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