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I have a steady oil leak even at idle. I added UV dye and tracked it to here. Is this part i have circled in red the rear main seal cover? I dont see a way to get in there to torque it down, as the bell housing is in the way. I replaced the oil pressure sensor and intake gasket so i have revisisted that area a few times. The leak is not the pressure sensor. This area circled in red is between the starter and the block.
I have a steady oil leak even at idle. I added UV dye and tracked it to here. Is this part i have circled in red the rear main seal cover? I don't see a way to get in there to torque it down, as the bell housing is in the way. I replaced the oil pressure sensor and intake gasket so i have revisisted that area a few times. The leak is not the pressure sensor. This area circled in red is between the starter and the block.
The rear cover is inside the bell housing. can't see it without taking out torque tube.
WHAT YOUR LOOKING AT IS ENGINE TO BELL HOUSING. DID YOU CHECK THE BACK OF THE HEAD. SEEMS LIKE IT'S COMING FROM UP ABOVE.
THAT'S WHAT I THINK IT IS ANYWAY. MAYBE SOMEONE CAN CORRECT ME.
Last edited by helga203; Sep 19, 2020 at 10:54 AM.
Reason: edit
I am dealing with an oil leak in that same area. Frustrating to find so far as it seems to be more widespread as mine even seems to be visible on the other side of the bell housing by the filter too but its definitely not the filter. Going to pull the heads to change them out this fall so I will figure it out then. Is there any way it could be the upper pan gasket ? If so what needs to ne dropped to pull that out ?
The rear cover is inside the bell housing. can't see it without taking out torque tube.
WHAT YOUR LOOKING AT IS ENGINE TO BELL HOUSING. DID YOU CHECK THE BACK OF THE HEAD. SEEMS LIKE IT'S COMING FROM UP ABOVE.
THAT'S WHAT I THINK IT IS ANYWAY. MAYBE SOMEONE CAN CORRECT ME.
thanks for the advice. I'll get back in there and hunt it down some more. I'll be back when I have more time spent on it
And if anyone has tips on the oil pan torque specs I would be glad to hear them. I have read on these forums that the manual specs are 18 foot pound on the front cover bolts and 106 inch pound on the rear cover bolts. I dont understand which is front and rear cover. This pan has the batwing bottom cover. So how do we know where is the front and rear cover? It looks like a bottom cover. I'm trying to re torque everything.
I am dealing with an oil leak in that same area. Frustrating to find so far as it seems to be more widespread as mine even seems to be visible on the other side of the bell housing by the filter too but its definitely not the filter. Going to pull the heads to change them out this fall so I will figure it out then. Is there any way it could be the upper pan gasket ? If so what needs to ne dropped to pull that out ?
from what I have seen you have to drop the front cradle to get the oil pan out
Last edited by Travis Armstrong; Oct 19, 2020 at 06:14 PM.
Reason: Mispelling
Here is a picture of the oil pressure sensor i took with a borescope while the engine was running. Yeah its dirty but it doesnt look like there is an active leak. The oil really appears to be coming from the rear seal cover. I took the intake off twice since i replaced the oil pressure sensor. Once before adding UV dye and once after. Ayone want to weight in before i start to pull the rear end? Here is a picture of the oil pressure sensor i took with a borescope while the engine was running. Yeah its dirty but it doesnt look like there is an active leak. The oil really appears to be coming from the rear seal cover. I took the intake off twice since i replaced the oil pressure sensor. Once before adding UV dye and once after. Ayone want to weight in before i start to pull the rear end?
Here is a picture of the oil pressure sensor i took with a borescope while the engine was running. Yeah its dirty but it doesnt look like there is an active leak. The oil really appears to be coming from the rear seal cover. I took the intake off twice since i replaced the oil pressure sensor. Once before adding UV dye and once after. Ayone want to weight in before i start to pull the rear end? Here is a picture of the oil pressure sensor i took with a borescope while the engine was running. Yeah its dirty but it doesnt look like there is an active leak. The oil really appears to be coming from the rear seal cover. I took the intake off twice since i replaced the oil pressure sensor. Once before adding UV dye and once after. Ayone want to weight in before i start to pull the rear end?
if it was the rear seal where is
the oil under the car. If oil is going up that is a bad leak. The crank is shooting oil up which I never seen before but there always the first
To get oil from the oil sensor to the starter well be a pretty good leak which I don't c. If it not the head area . Valve covers gasket pvc what ever is up that way. If not start jacking up and tear it all out.
Last edited by helga203; Sep 20, 2020 at 05:23 PM.
I think there is a misunderstanding. I'm trying to say that the sensor area at the top of the block has never shown signs of oil. I believe it is from the rear block plate. I was looking for others to weigh in
After lots of digging I stumbled into these 2 photos. They have saved me from pulling the rear end out. If you are like me you want as much knowledge and info as you can get. You cant see the cam sensor leaking from the engine compartment with the intake out. And this is why.... there is a little chamber down below the bell housing, and the cam sensor goes down into the block about 4 inches. This is also why I didnt see oil on top of the bell housing, as I expected from the pressure sensor. I hope this helps someone else.
Last edited by Travis Armstrong; Sep 24, 2020 at 12:13 PM.
Did you successfully eliminate the leak by replacing the (CMP) cam position sensor?
Does anyone else have experience with this issue?
I have a leak in the same area. I’m assuming it is the rear cover. The oil pressure sensor is new, doesn’t appear to be leaking, and functions properly. I suppose the only way to know for sure is to remove the flywheel and bell housing.
Did you successfully eliminate the leak by replacing the (CMP) cam position sensor?
Does anyone else have experience with this issue?
I have a leak in the same area. I’m assuming it is the rear cover. The oil pressure sensor is new, doesn’t appear to be leaking, and functions properly. I suppose the only way to know for sure is to remove the flywheel and bell housing.
i didnt even replace the sensor. I just put a new o-ring on it. That did stop my leak. Honestly i havent driven the car yet, but running it in my garage before would produce maybe a 3 second drip rate. After replacing the o-ring i have no drip at all when running in my garage.
Travis,
If your test shows you fixed the leak, can you post a short write-up in a new thread on how you did it, for future reference? Or if you followed a guide that you verified, can you link it?
After getting the car much more restored and ready for the road, i discovered that just replacing the o-ring alone did not stop the leak
It slowed the leak but didn't stop it. I'm sure the leak is still coming from the same sensor though. I pulled it back out and it was saturated with oil ABOVE the o-ring.
I have a whole new NTK cam sensor on the way. NTK is the same brand as NGK, so I figure its a good part.
i thought the o-ring i bought was sufficient size and material, but i guess not.
Travis....thanks much for the follow-up! I came across the same photos you did and have always thought that my slow leak could very well be the cam position sensor. I've not had a chance to pursue my leak but will be watching this thread for your results.
I had a leak from the oil pressure sensor and replaced it along with the cam shaft sensor. The Oil pressure sensor was leaking pretty bad, it was actually loose. The camshaft sensor looked like it may have been leaking too. The oil pressure sensor leaked mostly around the bell housing and there was alot of oil on the starter mounting bolts. I did not sée any oil on the flywheel. I didn't realize that the camshaft sensor can actually drain inside the bell housing. Here is picture of the camshaft sensor mounting location and you can also see the oil pressure sensor mounting location. Camshaft sensor looked wet around the o-ring so I replaced it too .
Last edited by C5MSG2004Vert; Sep 14, 2021 at 08:33 PM.
Well I'm convinced to just bite the bullet and stop making excuses for not pulling the torque tube out.
So many threads have mentioned that the cam sensor isn't a pressurized area, so I just kept digging for information online.
So if you're like me and you have quadruple checked the oil sensor and its bone dry, but the cam sensor is constantly wet with oil.... maybe you can stop hoping its as simple as the cam sensor.
Look at this picture with the rear block plate off and see that the oil is coming from the high pressure crossover. Stole this photo from a thread where the guy had my exact issue and thought it was the cam sensor cause it was always wet.
I am dealing with an oil leak in that same area. Frustrating to find so far as it seems to be more widespread as mine even seems to be visible on the other side of the bell housing by the filter too but its definitely not the filter. Going to pull the heads to change them out this fall so I will figure it out then. Is there any way it could be the upper pan gasket ? If so what needs to ne dropped to pull that out ?
My oil pressure sensor was leaking and it was leaking onto both sides of the bell housing and onto the exhaust pipes. The starter bolt and oil filter area all had oil. If you need to see what's happening get a cheap borescope from Amazon. It will let you see exactly what's happening at the oil sensor and even let you look into the bell housing from the inspection plates. It will also let you look at the oil pan gasket area.
Last edited by C5MSG2004Vert; Sep 15, 2021 at 10:20 AM.
Rear main seal cover
good follow up
