Vacume and oil supply question ! I have installed the pcv and the Ampco lubricator together made a T connection going in to the standard inlet manifold undeneath the Carter YF carb. Filled the container with oil and noticed there is litle vacume to suck the oil out from the container towards the inlet but all pasages are free! What can i do to increase the vacume or how do i make the oil running downwords with vacume i have? The nozle inside the T is shown and has one small and one bigger hole. I have turned it with the coning thread + small hole towards the T and manifold. Martinius
You will get your highest vacuum during deacceleration. You can check this with a vacuum gauge. 17-21 inches of steady vacuum is normal and when you crack the throttle it will drop considerably then come back up and stabilize when the RPM's are held steady. Then when you release the throttle the vacuum will increase as the engine returns to idle. Then at idle the vacuum will return to the normal reading of 17-21 inches. All this is true as long as you don't have any vacuum leaks, burnt valves or worn out rings....Big Tim
Vacuum gauges are a great tool for engine diagnostics I go this from http://greenwrench.hubpages.com/hub/Using-A-Vaccum-Gauge-For-Engine-Diagnostics "Simple And Cheap Tool Vacuum Gauge Diagnostics Note;Connect Vaccum Gauge After Throttle Body,Leave All Vaccum Hoses Connected. -Normal Engine at Idle When the engine is warmed up and working correctly, at idle the needle of the gauge should be steady and within the range of 17 – 22 inches of vaccum. -Normal Engine operation when Throttle Snapped Open and Closed Vacuum should drop to 3 and then gradual climb to 25 – 28 before settling back at the previous value. This indicates that the valves and rings are OK. -Poor Rings or blow-by at Idle The needle will be steady but the reading will be lower than normal. -Poor Rings or blow-by when Throttle Snapped Open and Closed Vacuum will drop to near zero and then gradual climb to about 22 before settling back to previous value. -If you have a Valve hanging open The needle will drop occasionally about 4 inches of vaccum from its normal idling reading. -Burnt Valve The needle will regularly drop by a greater amount than with a sticky valve ,If showing 6 inches of vaccum you.have a Leaky Valve The needle rapidly drops two or more inches each time the valve should be closed. May also indicate a Lean misfire. Loose Valve Guides Fast vibration of the needle between 14 and 19 inches of vacuum. -If you have a Weak Valve Springs When revving the engine hard, needle varies between 14 – 22 inches of vaccum. As rpm increases, a wider variation occurs in needle movement. -Leaky Intake System Needle reads low ( below 5 inches of vaccum)and idle will be rough and unstable.. May also indicate late ignition timing or incorrect camshaft timing. -Leaky Head Gasket Between Cylinders Needle floats regularly between 5 and 19 inches of vaccum. May also indicate intake manifold gasket leak at an intake port or a faulty injector. -Blocked Exhaust High reading at first but will normaly stay under 3 inches of vaccum.Also motor will be very flat, no power. -Clogged PCV or Intake Manifold vaccum Needle moves slowly through a wide range of readings. Also check idle air/fuel ratio. Conclusion Obviously vacuum gauge readings cannot pinpoint all problems, but they can save you a lot of time and money in chasing down major issues. Altitude Factor- If looking at the readings, it’s important that you remember that the vacuum readings will decrease as your altitude increases. So if you live X amount of feet above sea level, remember to drop 1 inch of vacuum for each 1000 feet you are above sea level." Haasman
Ampco Lubricator As long as there's a good vacuum , everything is fine ~ it only allows a tiny fraction of oil to enter the intake manifold else the spark plugs would get wet and foul . That old , cracked rubber hose is kaputi & needs to go away RIGHT NOW , In general , clamps should never be becessary on vacuum connections .
Other options ? I am convinient with the fact that this engine is in ship shape as it whas recently overhauled!I am not awere of the fact if the sytem produces anaugh vacume but normally it does. I whas told by the Ampco vendor to cut out the PCV hose from the dual setup to see if it will suck anough oil. I will also remove the PCV hose clamps as the hose is pretty tight although and to avoid leakage. Is there any solution to connect the PCV another place and get it to work ? I would want to make a fresh air outlet from the aircleaner towards the rocker cover aswell but i am hazitating though to make the install before i am shore it works as i have to drill some holes in both ! Martinius.
Vauum Signals Always go *very* slowly when contemplating cutting holes in original air cleaners ! . A PCV and Ampco Lubricator both need a strong manifold vacuum signal to work and both can work in the same engine .
A good solution is a seperat intsall of the Ampco lubricator & PCV valve . What i did is i installed the nozle with venturi hole ( 1 mm) into the manifold and only connected the lubricator wich works fine now. It shows a very thin oil flow in the inspection glass. Oil comp. in Norway have started adding alcohol to gasoline 95 and 98 octane wich booster the gasoline even moore then the additives you can buy from Statoil comp. It makes the gasolin very dry indeed and on the long term ruin the engines seats, valves and it burns poorly. I whas told i could make another connection in the manifold go get the PCV valve to work. There should be anough vacume there with a standard Carter carb and oil bath filter.
