How to verify crankcase oil level on a /6? |
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How to verify crankcase oil level on a /6? |
tornik550 |
May 23 2016, 08:52 PM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
I also posted this on pp however I usually get better responses here.
I recently rebuilt my 2.7l. I have the engine on a test stand. The oil tank is mounted at approximately the same level as it would be in the car. I am questioning the actual oil level in my crankcase. I put 12qts in the tank. I cranked the engine without ignition to get the oil pressure up. The dipstick doesn't show any oil so I put a couple more quarts in and it still doesn't show on the dipstick. I suspect there is actually too much oil because I can see a little bit of standing oil in the cylinders with a scope. It is not oil from assembly cause it was a different color. I am using a used 911 oil tank from an unknown engine. Normally I would just wonder if my dipstick was just not correct however since the setup is on a test stand, I wonder if something else is going on and I would like to verify the oil level in the case before starting the engine. How can I do that? |
jcd914 |
May 23 2016, 09:24 PM
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#2
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
I think 14 qts will show even cold.
The concern I would have is how did all the oil get from the tank to the engine case so fast? The oil would have to flow thru the oil pump to get into the crankcase and it should take several days (or longer) for several quarts to flow in. If you are seeing oil in the cylinders, there is too much oil in the crankcase. Because it is a dry sump engine, it actually needs very little oil in the tank (5qts?) to fill the oil gallies, cooler and crank up oil pressure (even run the engine). The 8-12 qts is to provide thermal capacity for extended running and load. Did you get any oil pressure while cranking? Was the oil pump you installed new or used? Did you have the oil pressure circuit modification done to the case? Might check the oil pressure relief valve to make sure it sits all the way in and seals normally. Jim |
r_towle |
May 23 2016, 09:27 PM
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#3
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
I think 14 qts will show even cold. The concern I would have is how did all the oil get from the tank to the engine case so fast? The oil would have to flow thru the oil pump to get into the crankcase and it should take several days (or longer) for several quarts to flow in. If you are seeing oil in the cylinders, there is too much oil in the crankcase. Because it is a dry sump engine, it actually needs very little oil in the tank (5qts?) to fill the oil gallies, cooler and crank up oil pressure (even run the engine). The 8-12 qts is to provide thermal capacity for extended running and load. Did you get any oil pressure while cranking? Was the oil pump you installed new or used? Did you have the oil pressure circuit modification done to the case? Might check the oil pressure relief valve to make sure it sits all the way in and seals normally. Jim (IMG:style_emoticons/default/agree.gif) I will add that my 911 shows nearly empty till The oil is hot. The correct way to check the oil is when it's hot, running, at idle. A first for me, but it does make a difference . |
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