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v-12 intake manifold


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#1 charlie1942lc

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Posted 25 January 2013 - 10:36 PM

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.

#2 zazothex

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Posted 26 January 2013 - 12:08 AM

You mean the hole for the oil float indicator?

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#3 Waldren

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Posted 26 January 2013 - 12:59 AM

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.

#4 zazothex

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Posted 26 January 2013 - 03:53 AM

ahh. good call. I agree

#5 charlie1942lc

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Posted 28 January 2013 - 10:56 PM

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

#6 peecher

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Posted 29 January 2013 - 03:08 PM

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.




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