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BigJimny Meet 2019 (17 May 2019)

BigJimny Meet and off-road driving day



20TH OCTOBER 2019

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Noggin and Natter - pre-event chat - Old Bell at Grazeley (part of hotel) 7:30pm 19th October

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Engine oil on transmission housing - where from?

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29 Jan 2018 18:48 #188950 by asypeer
Jimny 2006, automatic transmission, I added some uv glowing additive to the oil to figure out if I have any leak and after 500 km I can spot some glowing oil on the upper of the transmission bell housing.
Any idea where could this oil come from? The valve cover gasket seems dry, although it’s hard to see the rear of it.
Some images I’ve just took:



Cheers,
Assaf

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29 Jan 2018 18:57 #188951 by Lambert
Err I'm not sure what you are looking at but the glowing thing in the middle of the pink circle is a cable tie not an oil leak? Or am I missing something here?

Dreadnaught (black 2011)

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29 Jan 2018 19:16 #188953 by mickt
Could be from the rear crankshaft oil seal maybe?

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29 Jan 2018 20:31 #188960 by asypeer

Lambert wrote: Err I'm not sure what you are looking at but the glowing thing in the middle of the pink circle is a cable tie not an oil leak? Or am I missing something here?


I’m referring to the oil in the depth of the image, a bit greenish..

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29 Jan 2018 23:10 #188966 by CharlesS
Are you sure it's oil.
Greenish generally indicates a coolant leak.
Wipe a little up with your finger and if it smells sweet; then it's engine coolant.

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30 Jan 2018 05:06 #188970 by Lambert
If you have dyed the oil for uv then any trace would be very obvious like the cable tie. That makes me think it's possibly not oil but some other contaminants or overspill or something.

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30 Jan 2018 14:11 #188979 by asypeer
Hi, I added UV dye to the oil - therefore the oil is greenish..
Anyways, we found out that the leak was probably from the camshaft o ring which dried over time.
5 minutes later with a new o ring fitted and some degreaser to clean the bell housing and I think we are OK now.

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30 Jan 2018 15:54 #188984 by Lambert
That would do it!

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30 Jan 2018 23:14 #189007 by CharlesS
Great find....
UV glowing dye....
I use that to locate leaks in air conditioning, but never tried using that with an engine oil leak.

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01 Feb 2018 11:25 #189031 by asypeer
I’m planning to replace the oil soon so I thought it won’t harm to add 20cc for 500km. Finger crossed.

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