Oil leak.

[Bmfinney]

Hey y’all haven’t been back on here in a long time my jeepers been running good until I changed my oil.. I went with castrol 5w-30 and I’ve been driving it back and forth from work for about a week. Then coming home from work I noticed oil is pouring out of the slot in the bell housing. I checked the oil level and noticed I was a quart overfilled. I drained the oil down to where it was supposed to be and drove it home. But now it’s still leaking badly. Did I just blow the rear main seal out? Have you all heard of this? It never leaked before.

 

[RCP Phx]

From your description I would say it's more likely just the pan gasket, how old are both of them?

 

[cruiser54]

https://cruiser54.com/?p=96

 

[Bmfinney]

They’re both old. I’ve looked for the leak felt behind the valve cover I didn’t feel any oil. I will keep looking before i also checked the pan gasket. The reason I think it’s the seal is because it’s leaking behind the flex plate. But I will triple check. They’re both old I haven’t needed to mess with either. It starts leaking as soon as I start the engine

 

[75SV1]

My thought is it happened right after your oil change. So, I think you need to look at the oil pressure sensor, by the oil filter.

 

[Bmfinney]

After working on it for the past week. I replaced the rear seal and oil pan gasket and oil pump. I went ahead and ordered some tracer dye. I think me overfilling it my not have been the problem. I’m starting to think it’s the front input shaft seal on the transmission. I know for certain now that nothing above the oil pan is leaking. I went ahead and checked the level of automatic transmission fluid and it is dry that’s with the motor running. If it is the fluid is super dirty. But.. I have a knock that sounds like a rod knock at the rear of the motor when idling I’m gonna pull the oil pan off and check the rear connecting rod bearings but might be a dumb question could a torque converter failure cause a knock. I’ll know more when I get the dye. There is oil pressure for certain not sure how much because it has a dummy guage on it. But I went ahead and replaced the oil pump but it was doing it before hand. I did check the the clearance between the rod cap and the journals of the crank with a feeler guage while the pan was off and they where still within spec.

 

[Bmfinney]

The side to side clearance of the bearings

 

[RCP Phx]

You should have been able to tell the difference just by the smell!

 

[Bmfinney]

Hmm I didn’t smell it I’ll smell it see what it smells like

 

[Bmfinney]

I believe it is atf fluid by the smell. I think that knock though is a separate issue in the motor.. My engine oil level doesn’t look to be going down after running it for half and hour.

 

[cruiser54]

How about the color?

 

[Bmfinney]

Well its very dirty.. not dark black but dirty i can’t tell the difference from my motor oil and transmission fluid. Still waiting on the dye to come in which isn’t good I topped it off last time I had to work on it. But I’ve never actually changed the fluid on the transmission with might have what caused this problem if it’s leaking

 

[cruiser54]

What does the trans fluid look like on the dipstick?

If you have never changed it, grab 4 quarts of good old Dex/Merc trans fluid from the store.

Remove the drain plug, drain it, reinstall the plug and fill the trans. Go ahead and put 3 quarts in and then follow the instructions on the dipstick to top it off.

 

[Bmfinney]

Well the pump seal on the trans is the problem after using up dye. I pulled the transmission out I’m going to wash it replace the seal and new fluids. Is there anything else I should replace while the tranny is out?

 

[RCP Phx]

While it's out, I would pull the pan and clean it and the filter!

 

[Bmfinney]

Okay will do thanks!

 

[Bmfinney]

Well this dang transmission leak is really pissing me off. I put a new seal in it. Pulled the pan cleaned it put everything back together and still leaking.. Gonna have to pull it again. I guess I’m gonna replace the pump and torque converter next. It’s not as bad as it was. When I pulled it the bell housing was all busted up. That’s another thing I replaced. After running it awhile with new fluid it’s back to being dark brown metallic color. The transmission shifted fine I never had problems with it before.

 

[RCP Phx]

That's pretty unusual, did the torque converter have a groove in the shaft?

 

[Bmfinney]

Yeah it does

 

[Bmfinney]

I’m gonna change the fluid and let it run for a bit. Before I yank it back apart.