ZR-1 Net Registry Forums - View Single Post - Slight oil accumulation in air bridge and air horn

Don in VT · 05-09-2012

Hi All,

Wow, never to old to learn something new. My thinking was that
the filtered air in the air horn is drawn into the cam cover and on through the motor and finally exiting at the PCV valves and on into the motor. I can now visualize that, under certain circumstances, the air flow over the inlet air horn hose fittings may have a venture effect and actually draw the air oil mix that is present in the cam covers. It is also possible that under certain engine conditions the vacuum drops off and the cam covers could go slightly positive with respect to the Air Horn and oil will migrate to the AH.

Anyway !!

I am not going to pull the cam covers at this time but instead come up with another solution to solve the over oiling of the Air Horn.

BTW, the ZR is all buttoned up now and passed its first smoke test and it is running great. I had O problems when filling the cooling system. The Samco hoses look great. The new thermostat controls well, The water pump is smooth and quiet. THE SECONDARIES ARE WORKING !!

Thanks to you all for all the help and support,

Don

05-09-2012	#8
Don in VT Join Date: Jul 2010 Location: Fairfax, VT Posts: 203	Re: Slight oil accumulation in air bridge and air horn Hi All, Wow, never to old to learn something new. My thinking was that the filtered air in the air horn is drawn into the cam cover and on through the motor and finally exiting at the PCV valves and on into the motor. I can now visualize that, under certain circumstances, the air flow over the inlet air horn hose fittings may have a venture effect and actually draw the air oil mix that is present in the cam covers. It is also possible that under certain engine conditions the vacuum drops off and the cam covers could go slightly positive with respect to the Air Horn and oil will migrate to the AH. Anyway !! I am not going to pull the cam covers at this time but instead come up with another solution to solve the over oiling of the Air Horn. BTW, the ZR is all buttoned up now and passed its first smoke test and it is running great. I had O problems when filling the cooling system. The Samco hoses look great. The new thermostat controls well, The water pump is smooth and quiet. THE SECONDARIES ARE WORKING !! Thanks to you all for all the help and support, Don Last edited by Don in VT; 05-09-2012 at 07:29 PM. Reason: wordsmithing and update