Oil leak front of engine

KYLEGORMAN559

MEMBER
2004 VOLVO S40
2.5L
5 CYL
TURBO
2WD
AUTOMATIC
113,500 MILES

Hi, I have an oil leak on front of engine, dripping down oil pan also I believe it’s a pressure leak? I do not know but it leaks when I speed (freeway) or 80+ mph, I just replaced my oil pressure sending unit(sensor) and o-ring on my oil dipstick pipe that goes into oil pan, looks like it’s from oil pressure sending unit area as shown below it seems to spray everywhere. Thoughts?

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5 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,883 POSTS

It is hard to tell from your picture where the problem is, but it sounds like the front main seal has let go. To be sure let's clean the area and use this guide to help find the leak:

https://www.2carpros.com/articles/engine-is-leaking-oil

Can you please shoot a quick video with your phone so we can see what's going on? that would be great. You can upload it here with your response. Please run down this guide and report back.

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Monday, May 4th, 2020 AT 12:13 PM

KYLEGORMAN559

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6 POSTS

Will upload more. Also, do you think it might of been my pvc clogged or damaged that might of caused main seal to leak? I do not know much about pvc system and how maintenance works on them also I can’t tell if it’s bad. Hoses look fine but I am check more into it.

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Monday, May 4th, 2020 AT 3:37 PM

KEN L

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Thanks for the video. It looks like oil is coming out everywhere. Lets try the PCV valve first. I would try to clean the engine so you can get a better idea where the oil is coming from. Can you let the engine idle can you tell where it is dripping from? I did find this service bulletin about the PCV system. Check out the diagrams (below). Please let us know what happens.

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Tuesday, May 5th, 2020 AT 10:57 AM

KYLEGORMAN559

MEMBER
6 POSTS

Oil only drips when I’m over 3,500 rpm's or more. I’m slowly changing parts on the PCV system, I’m changing the diaphragm to the PCV breather box. I want to go cheap as possible do to limited funds, Volvo parts of course I will not be cheap on. What do you think of changing the diaphragm? I'm pretty sure it’s a PCV system fail because of my symptoms.

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Thursday, May 7th, 2020 AT 3:29 PM

KEN L

MASTER CERTIFIED MECHANIC
42,883 POSTS

Yes, a clogged ventilation system will cause the engine to leak. Here is how you can clean the positive crankcase ventilation system. Check out the diagrams (below). Please let us know what happens.

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