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Oil still leaking after OFH gasket replaced and low oil pressure light
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10-17-2016, 03:07 AM | #1 |
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Oil still leaking after OFH gasket replaced and low oil pressure light
My car is a 2009 135i with 52,XXX miles.
I've done my valve cover gasket + valve cover a year ago at about 36K miles. Recently: 1. I've gotten an express oil change from the dealership 2. Walnut blast my intake valves (mechanic told me my OFH was leaking badly) 3. Replace oil filter housing gaskets and drain/flush coolant After I replaced my oil filter housing gaskets, the major leak stopped and I thought I was free from doing anymore maintenance. But sadly I still had an oil leak and after driving it around for a day, my car now has low oil pressure also. I have no clue what's going on, please help me figure it out. Here are some photos of the oil leak; it is coming from the intake side and dripping down. I hope it's not the valve cover but I honestly have no clue. What do you guys think it could be? |
10-17-2016, 12:07 PM | #3 | |
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If you're talking about the oil cap, the one on top of the engine right? Not the cap for the oil filter housing ? |
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10-17-2016, 03:05 PM | #4 | |
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10-18-2016, 11:10 AM | #5 |
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Well without looking at the car its going to be hard to tell where the leak is coming from. I would try to isolate where it is coming from. Things to consider, oil pan gasket, front main seal, rear main seal but those will all be lower on the car. Up top its usually the valve cover or the oil filter housing gasket
Low oil pressure is another story. Have you ever shredded your drive belt and had it screw up the front main seal? If so it is common for debris to get in the engine and clog up the oil pickup tube resulting in low oil pressure. Unless there is a major leak somewhere or your oil cap/ oil filter cap is not sealing, that is usually the culprit
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10-18-2016, 11:00 PM | #6 |
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How fast are you losing oil?
In the picture, it almost looks like there is oil pooling by your oil filter cap, which is a sign that your OFHG is still bad. Could be a aftermarket filter not seating, but you mentioned it was done at a dealer. |
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10-19-2016, 08:12 PM | #7 |
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If your beslt snapped and u have low oil pressure light especially in the morning then its a clogged tube... just did it and finally we discovered the belt shredding sin the tube.
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11-07-2018, 09:33 AM | #8 | |
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11-07-2018, 07:19 PM | #9 | |
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11-09-2018, 09:50 PM | #10 |
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Everything is new from bmw I don’t have the oil cooler on my OFH, I replaced the gasket 3 times but it’s still leaking! This is driving me nuts I used UV dye and it’s coming right under neath the OFH traveling under the manifold it’s not the head gasket Because it’s leaking right under where the head meets the block could it just be a bad OFH not holding pressure? When I bought the car the oil filter cap didn’t have the clip on piece for the filter I bought a new one but still same problem! I’m lost
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11-09-2018, 10:51 PM | #11 | |
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11-10-2018, 09:42 AM | #12 | |
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11-10-2018, 12:34 PM | #13 |
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11-10-2018, 12:50 PM | #14 | |
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So, it might be worth changing the OFHG. Maybe use some Ultra black with a new OEM gasket. This will increase the longevity of the seal. I good "while your in there" with a OFHG project is a walnut blast or scrubbing/ cleaning of the intake valves with a gun wire brush kit & some CRC intake cleaning solution. |
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11-10-2018, 12:56 PM | #15 | |
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11-16-2018, 04:14 PM | #16 | |
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So I bought a New Oil Filter Housing and put a new Gasket on it and still leaking... is there anything else underneath the OFH that could cause a leak? |
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11-16-2018, 06:33 PM | #17 | ||
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How old are your intake valve gaskets? Head gasket is near there, but it's really rare that a head gasket leaks on an n54/55 |
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11-18-2018, 07:44 PM | #18 |
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Did you use oe bmw gasket and correct torque values? Have seen folks using oem gaskets that began seeping/leaking again.
Overtighening ofh and och bolts can deform gaskets. |
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11-19-2018, 10:39 AM | #19 | |
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Would the intake manifold gaskets cause a bad oil leak? i would get codes for that i think... anyways doing a little more research maybe my head bolts in the front are warped or expanded and i may need to just replace them. worth a try other than that I am lost for words. i looked all over a head gasket problem and nobody seems to have that problem with the n54 n55 they all say its the OFHG but i am tired of hearing that! hahahaahaha i replaced it so many times! could the Bolts from the oil filter Housing be bad and need to replace those? idk any help appreciated guys |
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11-19-2018, 10:41 AM | #20 |
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I tightened the bolts to the right torque and i used oem gasket aswell. Could the Steel bolts on the housing be bad? they look fine to me dont look like they are messed up they bolt in fine with no problems
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11-19-2018, 05:06 PM | #21 | ||
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It's gotta be either your Front Crank Seal or your OFHG. I think the bolts for the OFHG are steel. They are not one time use. I did mine about 60,000 miles ago or 4 years so I am a little fuzzy on. Given you are seeing oil on the back side of the alternator, I'd rule out the front crank seal. So, OFHG..... What car do you have ? 328 or 335?? |
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11-19-2018, 08:46 PM | #22 | |
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I have a 2008 335xi coupe, I replaced the front crank seal thinking that was the problem and it wasn’t, oil is coming just underneath the head gasket in the front of the engine and oil is pooling up behind the manifold could the block side where the oil filter housing sits be damaged? I have pictures I just don’t know how to upload to here... I am using a oil dye and it’s definitely coming just under the OFH under the head gasket |
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