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Hello fellow Focus aficionados,

Been having a very slow leak show up at the junction of the transaxle and the motor. I think I pinpointed where it is coming from exactly (at least I think). See pics for oil leak. Showing both sides of motor and transaxle.

I have seen one post about a similar leak but I don't think it was ever resolved as to what the actual cause was. Does anyone have enough experience to know where this is coming from and whether it is anything other than a nuisance at this point. Just had the transmission swapped out a little under a year ago and hoping to get at least 2 more years out of this bad boy. Currently at ~170K miles. Any insight appreciated.

Stay safe all!
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2004 Focus Wagon, Zetec DOHC, Auto
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Appears from the photos to be red fluid, so that is from the transmission. Likely a seal is leaking and will only get worse over time. Keep an eye on the transmission fluid level. Do you have a warranty on the tranny?
 

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Appears from the photos to be red fluid, so that is from the transmission. Likely a seal is leaking and will only get worse over time. Keep an eye on the transmission fluid level. Do you have a warranty on the tranny?
I actually dabbed the fluid on a paper towel and smelled - as well as assessed the color - and all indicate it is motor oil.
The tranny does have a warranty, but this leak preceded the tranny swap over a year ago.
 

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Engine oil coming from that weep hole due to a leaking rear main seal?
 

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Engine oil coming from that weep hole due to a leaking rear main seal?
The oil does not seem to be coming from that hole, but from the location the arrow is pointing. I agree that it is probably a bad seal. Wonder if I will have to replace the oil pan soon? Leak is very slow right now.
 

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The oil does not seem to be coming from that hole, but from the location the arrow is pointing. I agree that it is probably a bad seal. Wonder if I will have to replace the oil pan soon? Leak is very slow right now.
Why replace the pan? Why not remove the pan and reseal it with RTV (I don’t believe your year uses a gasket but I may be mistaken)?
 

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I’m guessing you get a small drop or two on the ground every day. For that amount of oil, I would RTV the area you think is leaking to reduce oil seepage and buy you some time. This may let you know if this is coming out of the weep hole too – just don’t plug the weep hole.
 

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Discussion Starter #8
I’m guessing you get a small drop or two on the ground every day. For that amount of oil, I would RTV the area you think is leaking to reduce oil seepage and buy you some time. This may let you know if this is coming out of the weep hole too – just don’t plug the weep hole.
Maybe one or two drops at best. That's actually a great idea! by weep hole, do you mean the hole in the attached pic?
 

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Why replace the pan? Why not remove the pan and reseal it with RTV (I don’t believe your year uses a gasket but I may be mistaken)?
I was thinking that if I was going to remove the pan, might as well replace it. It is the original pan and the car is 14 years old.
 

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yes, the weep hole is that little gap. You are seeing the oil pool at the lowest point it can go. It's hard to tell from the pics but the oil could be coming from the weep hole and following the seam down to the lowest point. I guess you could also stick a bit of paper towel in the weep hole and check (and leave it in there for a short period to be sure). Hopefully, the oil is not originating from the weep hole and therefore a bit of RTV along that seam may stop or slow the leak.

If you do remove the oil pan and RTV it, you don't need a new oil pan unless it is damaged. However, I would personally not do that messy job unless there was a lot more oil loss.
 

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Discussion Starter #11
yes, the weep hole is that little gap. You are seeing the oil pool at the lowest point it can go. It's hard to tell from the pics but the oil could be coming from the weep hole and following the seam down to the lowest point. I guess you could also stick a bit of paper towel in the weep hole and check (and leave it in there for a short period to be sure). Hopefully, the oil is not originating from the weep hole and therefore a bit of RTV along that seam may stop or slow the leak.

If you do remove the oil pan and RTV it, you don't need a new oil pan unless it is damaged. However, I would personally not do that messy job unless there was a lot more oil loss.
Exactly my thoughts...didn't want to remove unless critical to address.

I didn't see a trail from the weep hole, but will try the paper towel method and see if I can spot anything coming from there. Thanks for your insight!
 

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I was at the junkyard last weekend working on an unrelated issue. If it helps, I took this pic of an 05 ZX4 to show how an oil leak would make its way out the weep hole. The oil pan is closed off on the side where it butts against the transmission housing.

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