I'm having an oil leak on a d15b7 that I can't figure out. The oil is coming from the back of the engine on the oil filter side. The back of the oil pan is covered in oil and it looks like around the oil filter has oil on it too. I plan on jacking it up this weekend and looking more closely.

I have already replaced the front crankshaft seal, oil pan gasket, rear main seal was new, valve cover gasket, PCV oil seperator gasket, and I have changed the oil but the car has leaked with an old filter and a new filter.

The car leaks about a quart every 200miles or 7 days. It does leak even when it sits. Not sure if it stops after a while or not though. I'm sort of at a loss on what to check now. Like I said I'm going to look at it more this weekend.

 

Have you checked to see if an old oil filters o ring is stuck on there?

 

Yeah I checked that. I've made that mistake before a long time ago so I always check and make sure it came off.

 

I took my em1 to honda and they did a dye test to find where my oil leak was. Maybe thats a route you could try.

 

I hope I don't have to do that. It was probably expensive?

 

I got a multi point inspection because I recently got the car, a diagnosis at honda cost 105 at the one I brought it to.

 

If you have/can get a high powered UV lamp you could do the dye test yourself.

 

I would of guessed rear main seal, sure it was put on right?

You can buy dye at the parts store, put in the crack case. Wait a day or 2 after driving, sometimes you can see the dye without the special light. I added dye and when I was in for servicing the tech let me use his glasses and light in the shop.

Are you sure there is no top end leak, did you check the dizzy o ring area, valve cover area, long shot headgasket area etc.

 

Yes the rear main was replaced, I did it myself. But the oil is closer to the drivers side and middle of the oil pan. I have checked and the top is all clean and not leaking. I'll see if I can get some dye and find it that way.

 

Not sure if our vehicle has it or not, but the VTEC solenoid gasket? That was my problem at one time... it could also be the dizzy o-ring and the oil is traveling on the lip of the head around to the back...

 

What about the oil pan? Perhaps it's bent or cracked somewhere?

 

check the the oil pressure sensor it has one wire hook up on the back of the block next to the oil filter they crack in the middle and they only leak when the car is on

 

take a look at oil pressure sending unit

 

AutoZone will loan you a test kit. You'll need to buy the dye, but it's only a few bucks.