Oil leak & miscellaneous ??

[lvm3sm46]

This car is a recent purchase and my first M3. I was looking under the car and I saw some oil on the skid plate so I took them off for further inspection. Upon doing so I saw a leak from the CPV, which I went ahead and replaced. After the clean up I drove about 100 miles and then I inspected again and I then found more oil leaking but this time not from the CPV.

Below I have attached photos and if anyone could offer up their opinion on where they think its coming from it would be greatly appreciated.

I also attached pictures of what I think might be a missing bolt, maybe someone can confirm that.

[Mr.wReckless]

Looks like engine oil, and that you're also missing one bolt for the corner of the oil sump. That oil leak could be the RMS or a myriad of other things..

Regards

[jbfrancis3]

Since you've addressed the CPV, it could really only be a rear main seal, exhaust cam sensor o-ring or valve cover gasket. Others chime in if I'm forgetting something.

[FBloggs]

The missing oil pan bolt suggests to me that the oil pan gasket could be leaking due to mis-torqued pan bolts.
Follow the leak looking for an upwards and forwards trail.

[lvm3sm46]

The oil is concentrated in that area. It doesn't seem to be coming from higher up. I am assuming it is the rear main seal at this point.

The oil pan gasket has been changed (previous owner) so I am assuming he lost a bolt. I will source a new one.

[BMWE46M3]

How about the oil filter housing seal? And what’s the life of a rear main seal. I have the same scenario with the exception of the missing bolt.

[TexaZ3]

The oil is concentrated in that area. It doesn't seem to be coming from higher up. I am assuming it is the rear main seal at this point.

The oil pan gasket has been changed (previous owner) so I am assuming he lost a bolt. I will source a new one.

Is the bolt missing, or is it broken off? Hard to tell from the pic.

[lvm3sm46]

Is the bolt missing, or is it broken off? Hard to tell from the pic.

Definitely just missing

[TexaZ3]

Definitely just missing

Then definitely replace and re-torque the whole thing. If the threads are not stripped.

[jet_dogg]

I always love a good "HELP!" in thread titles as if this is a 911 call.

[lvm3sm46]

I always love a good "HELP!" in thread titles as if this is a 911 call.

It great isn't it. Not sure if I would actually get any help without asking lol

[jet_dogg]

Of course you would.

[FBloggs]

Do the PO happen to do the rod bearings?...while you're in there....man maths.
Fix'n'forget.

[lvm3sm46]

Do the PO happen to do the rod bearings?...while you're in there....man maths.
Fix'n'forget.

Yes he did, along with a slew of other things like clutch and VANOS cooling system etc.