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Old 09-05-2019, 09:57 AM   #1
PeterInSa
 
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Default Oil near Oil Filler Cap on my 313 Engine

Its to the right of the Cap and underneath the 90mm hose also on the right of the Cap.

Cap not sealing Correctly? or......

Comments appreciated

Thanks

Peter
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Old 09-06-2019, 09:42 PM   #2
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Default Re: Oil near Oil Filler Cap on my 313 Engine

Try to use cap gasket other face. Maybe it works.
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Old 09-07-2019, 12:52 AM   #3
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Default Re: Oil near Oil Filler Cap on my 313 Engine

G'day Pete, there is a chance and I hope I'm wrong that you might have excessive crank case pressure? With older worn engines burnt exhaust gas gets down past the piston rings into the sump. This slightly pressurises the sump which tends to pushes a small amount of oil out any openings it can find. There's a PCV valve that's meant to suck fumes back into the intake manifold but sometimes they cant keep up with the excess pressure or they stop working (worth checking).
I had an old tractor that was very very fumy. Engine performance had faded and when hot the dipstick tube would look like a small smoke stack when the dipstick was removed while running.
I'm hoping Ive read your note incorrectly and your engine is fine. Good luck mate.
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Old 09-07-2019, 11:53 PM   #4
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Default Re: Oil near Oil Filler Cap on my 313 Engine

Re (With older worn engines burnt exhaust gas gets down past the piston rings into the sump. This slightly pressurises the sump which tends to pushes a small amount of oil out any openings it can find.)
Hopefully at 150,000Km or so its not an Older worn out engine.

Will install a Catch Can prior to my next trip, monitor oil pick in the Catch can and look at the PCV valve on my return.

Re The Catch can: Will install over the air filter box next to the radiator. The Best location for Looks/Easy install is not in a good safety area.

Have one of these on our Landcruiser, so ditto for the Sprinter:

https://www.westernfilters.net.au/cr...4aAmgZEALw_wcB
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Old 09-08-2019, 12:06 PM   #5
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Default Re: Oil near Oil Filler Cap on my 313 Engine

At idle, if you loosen the cap, it should basically stay in place, maybe move a little. If it tries to fly off (hold it!), you may have high crankcase pressure. This can be caused by engine wear, but it can also be caused by a partially block oil separator/breather assembly.
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Old 09-09-2019, 12:07 AM   #6
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Default Re: Oil near Oil Filler Cap on my 313 Engine

Where is the (oil separator/breather assembly) Located

I read somewhere that check you mentioned should be done at 2000rpm, but I could not find this reference.

Checked mine and at idle the cap barely moves

Thanks

Peter

Last edited by PeterInSa; 09-09-2019 at 12:22 AM.
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Old 09-09-2019, 12:19 AM   #7
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Default Re: Oil near Oil Filler Cap on my 313 Engine

What year and engine do you have?
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Old 09-09-2019, 12:07 PM   #8
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Default Re: Oil near Oil Filler Cap on my 313 Engine

2003, 313 And I think its an 903

Ha.. Ha... Similar to below:
https://sprinter-source.com/forum/sh...hlight=313+903

Will still go ahead and install a Catch Can.
Going to cut the Hose about 25mm down from the top of the thick insulation hose, then use a joiners to get to and back from the CC.

Peter

Last edited by PeterInSa; 09-09-2019 at 12:09 PM.
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Old 09-09-2019, 12:46 PM   #9
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Default Re: Oil near Oil Filler Cap on my 313 Engine

Yeah, its the big black brick on the exhaust side of the engine valve cover.
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Old 09-11-2019, 08:38 AM   #10
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Default Re: Oil near Oil Filler Cap on my 313 Engine

The CC that I am looking at installing

https://chiptuning.com.au/provent-style-oil-separators/
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