Need help identifying source of oil leak…

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Gordolordo

Gordolordo

Joined
Oct 9, 2022
Threads
10
Messages
37
Location
United States
So following an oil change yesterday, I now have a pretty serious leak coming from the front of the engine near the fan pulley. I checked the oil filter and it is not leaking.

Here is a link to a video of the leak.



Can anyone help me identify what might be causing this? I’m not a big believer in coincidences when it comes to mechanical things, so I’m wondering what I could’ve done with a simple oil change that suddenly this is happening.
 
I'd start with the basics like making sure that the oil filter is appropriately tightened, and that the sealing surface is good. One thing that happens sometimes is the old rubber sealing ring from the removed filter doesn't come off, so you have two there and they leak.
 
CharlieS said:
I'd start with the basics like making sure that the oil filter is appropriately tightened, and that the sealing surface is good. One thing that happens sometimes is the old rubber sealing ring from the removed filter doesn't come off, so you have two there and they leak.
Click to expand...
Checked, and it is not leaking from the filter.
 
First step, check the oil and ensure it is not overfilled, if this is not the case I would suggest cleaning the engine and then looking for the source. If you cannot see where the oil is originating you could add a dye (sold at most auto parts stores) to your oil and then use a black light to trace the route.

Being it looks as though it is originating behind the pulley, there are four possibilities but the two main culprits (crank seal and oil pump cover plate). That "leak" is pretty considerable so like you said it must have just happened or you would have noticed. The other two would be the valve cover leaking or the distributor O-ring.
 
Is it me or is that oil awfully dark immediately after an oil change? The sound of the engine doesn't sound very good to me either.

With that location I would first look to the crank oil seal, I doubt it is the distributor or the valve gasket with that type of flow. Best thing to do is clean the hell out of the engine first. Finding the leak is much easier and if you have to work on it, it is so much nicer.
 
Brindleboxer said:
First step, check the oil and ensure it is not overfilled, if this is not the case I would suggest cleaning the engine and then looking for the source. If you cannot see where the oil is originating you could add a dye (sold at most auto parts stores) to your oil and then use a black light to trace the route.

Being it looks as though it is originating behind the pulley, there are four possibilities but the two main culprits (crank seal and oil pump cover plate). That "leak" is pretty considerable so like you said it must have just happened or you would have noticed. The other two would be the valve cover leaking or the distributor O-ring.
Click to expand...
It may be overfilled. What would that result in?
 
I believe this is a diesel engine and the usual suspected oil leaks for the 1fzfe won't apply here. I'm not versed in the 1hd or any diesels from land cruisers so I'm not much help. Sorry.
 
Gordolordo said:
It may be overfilled. What would that result in?
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If it’s overfilled bad enough and there is too much crankcase pressure it’s likely to leak from the front and or rear main seals. It’s hard to tell from your video but from what I can see, I’d guess your front main seal is the source of your leak.
 
TurbodreamZ said:
If it’s overfilled bad enough and there is too much crankcase pressure it’s likely to leak from the front and or rear main seals. It’s hard to tell from your video but from what I can see, I’d guess your front main seal is the source of your leak.
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Once that seal has been compromised, I’m guessing it has to get replaced?
 
@CruiserDave, just looked at his previous posts and it looks as though it is a diesel. I am not familiar with the diesel but would imagine the techniques for detection are the same.

@Gordolordo you may want to links this in the diesel section just incase there are considerations that would not be taken for the petrol engine. Also, recommend adding vehicle info to your signature line.
 
Brindleboxer said:
@CruiserDave, just looked at his previous posts and it looks as though it is a diesel. I am not familiar with the diesel but would imagine the techniques for detection are the same.

@Gordolordo you may want to links this in the diesel section just incase there are considerations that would not be taken for the petrol engine. Also, recommend adding vehicle info to your signature line.
Click to expand...
If people took the time to look at the upper left hand corner of the video Gordolordo posted it clearly shows that he is working with the HDJ81 engine,
 
Thanks for the help from everyone who responded. Between your inputs and some thread mining, I'm pretty sure it's the oil pump seal. I also found this thread addressing the job to fix it:

forum.ih8mud.com

How to Replace Oil Pump seal w/ Pics

I recently noticed that I had an oil leak coming from the front of my motor. After cleaning up the front of the motor to determine where the leak was coming from it was easy to see that it was coming from where the oil pump cover mated to the timing chain cover. I crawled under the truck once...
forum.ih8mud.com forum.ih8mud.com
 
Gordolordo said:
Thanks for the help from everyone who responded. Between your inputs and some thread mining, I'm pretty sure it's the oil pump seal. I also found this thread addressing the job to fix it:

forum.ih8mud.com

How to Replace Oil Pump seal w/ Pics

I recently noticed that I had an oil leak coming from the front of my motor. After cleaning up the front of the motor to determine where the leak was coming from it was easy to see that it was coming from where the oil pump cover mated to the timing chain cover. I crawled under the truck once...
forum.ih8mud.com forum.ih8mud.com
Click to expand...
The Thread you Show is Gas 1FZ-FE Engine Oil Leak.
Well Known and Documented - Dizzy (distributor) Leak, Crank (Crankshaft) Leak, Oil Pump Leak.

Is your Truck a HDJ81 - Diesel?
 
Hornd said:
The Thread you Show is Gas 1FZ-FE Engine Oil Leak.
Well Known and Documented - Dizzy (distributor) Leak, Crank (Crankshaft) Leak, Oil Pump Leak.

Is your Truck a HDJ81 - Diesel?
Click to expand...
It is, but I think that specific part is the same on both the HZ and HD engines.
 
Clean the engine COMPLETELY with Degreaser..If it hasn’t been mentioned. UV dye and the uv flashlight. Only add the dye to one fluid at a time and then operate for a day or two to rule out that system.

The area in the first pic lends to PWR steering but, clean it all and add the dye..

Some times old atf that has faded the red dye in it will pick up the dirt and grease run off from sloppy oil changes and make the ATF in the PWR steering leak appear black like engine oil.

Sometimes..
 
DIRTBIKEUSA said:
Clean the engine COMPLETELY with Degreaser..If it hasn’t been mentioned. UV dye and the uv flashlight. Only add the dye to one fluid at a time and then operate for a day or two to rule out that system.

The area in the first pic lends to PWR steering but, clean it all and add the dye..

Some times old atf that has faded the red dye in it will pick up the dirt and grease run off from sloppy oil changes and make the ATF in the PWR steering leak appear black like engine oil.

Sometimes..
Click to expand...
I’m pretty sure it’s not power steering fluid. I’ve collected samples from both the power steering reservoir and the drips that are coming off, and the power steering fluid is quite a bit darker and has a distinctive smell, whereas the drips that are coming off smell and look like clean engine oil, which it should be since I just changed it.

Also, the video makes the drips look darker than they actually are. I think it’s just bad lighting.
 
yes the diesel has an oil pump o-ring too but it's located between the oil pump and the engine block. it's a ton more work to replace then the gas engines. it could be the cause though, could also be crank seal, injection pump seal, timing cover seal, cam seal, oil cooler gasket, need to get in there and clean things.
 
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