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Old 11-25-2022, 12:08 AM   #1
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Oil leak between coolant filter and oil filter

I have a ISC on my 2000 Windsor. There is a point that is leaking engine oil. There is a hose that comes from the engine, and then goes to somewhere behind the oil filter.

I originally thought it is the hose clamp that is loose (which it is loose) causing the fitting to leak. So I added a hose clamp. But it still leaks. Anyone know what it this component? Any idea on the leak?

It probably has leaked for many years. As you can see my engine compartment is very oily and greasy. There are multiple leaking points, but this one is most obviously.
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Old 11-25-2022, 09:03 AM   #2
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Might be the crankcase breather.

Mine doesn't have a hose but a hard tube. These are known to drip oil, I installed a slobber bottle on the end of mine to catch the oil. Got a bottle the fit over the tube, put some holes around the top to allow for air flow, some steel wool in the bottom to soak up the oil, and rigged up a way to hold it in place. I empty the bottle when I service the engine.
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Old 11-25-2022, 09:12 AM   #3
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Difficult to tell from the pictures, but check the oil drain hose from turbo back to crankcase.
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Old 11-25-2022, 10:03 AM   #4
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Charts may show the amount needed in a new dry engine. Some of the old oil remains in the engine even after draining, or there may be different size oil pans. The results can be too much oil. The extra oil is blown out of the breather ( slobber ) tube. This topic used to come up a lot
Does your oil level go down a quart or two then stay level?
If it does that's most likely your desired oil level.
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Old 11-25-2022, 10:42 AM   #5
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When I first got my rig and changed oil I'd fill it up to the full mark and in a short time it would be low a couple quarts. Later after reading posts on the slobber tube and over filling I just added oil until it was about 2 quarts low. Now it hardly uses any oil at all, may have to add a quart every oil change.
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Old 11-26-2022, 01:10 AM   #6
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Quote:
Originally Posted by jacwjames View Post
Might be the crankcase breather.

Mine doesn't have a hose but a hard tube. These are known to drip oil, I installed a slobber bottle on the end of mine to catch the oil. Got a bottle the fit over the tube, put some holes around the top to allow for air flow, some steel wool in the bottom to soak up the oil, and rigged up a way to hold it in place. I empty the bottle when I service the engine.


I know it isnít the crankcase breather, because I have installed a Crank Case Vent kit on my breather. The breather tube is the bigger one goes across the frame with no hose clamp on it.
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Old 11-26-2022, 01:13 AM   #7
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Quote:
Originally Posted by RamiDav View Post
Charts may show the amount needed in a new dry engine. Some of the old oil remains in the engine even after draining, or there may be different size oil pans. The results can be too much oil. The extra oil is blown out of the breather ( slobber ) tube. This topic used to come up a lot
Does your oil level go down a quart or two then stay level?
If it does that's most likely your desired oil level.


It might be. Because I filled the engine oil even more than the full mark oil change first, in the hope that it will go down a bit once I start the engine.
So are you saying I should fill it lower than the mark on the dip stick?
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Old 11-26-2022, 12:08 PM   #8
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Originally Posted by Sinyyl View Post
It might be. Because I filled the engine oil even more than the full mark oil change first, in the hope that it will go down a bit once I start the engine.
So are you saying I should fill it lower than the mark on the dip stick?
I'm saying maybe. Here is a thread that might help.

https://www.irv2.com/forums/f123/oil-level-383151.html
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Old 11-28-2022, 04:55 PM   #9
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I drained about 2~3 qt out. Now it varely stays on top of the low mark on my dipstick. Let's see how it does!
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