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Old 31-03-2020, 18:13   #1
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Oil leak

Iíve just dropped the engine out of my IV to do some maintenance work.
There Has been a slight engine oil leak from the bottom of the timing belt cover. Anyway, I removed the covers and there is a build up of oil in the lower cover. Everything is bone dry except for the tensioner pivot arm bolt which has oil on it. Iíve removed the pivot arm and timing belt. There is no oil anywhere else except from one of the exhaust manifold studs and running along the head gasket line and behind the timing belt cover roughly where the pivot is.

When the studs leak is this normally where the oil ends up?

I cannot see anywhere else the oil is coming from.

Cheers
Phil
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Old 31-03-2020, 18:34   #2
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Originally Posted by Coggy View Post
Iíve just dropped the engine out of my IV to do some maintenance work.
There Has been a slight engine oil leak from the bottom of the timing belt cover. Anyway, I removed the covers and there is a build up of oil in the lower cover. Everything is bone dry except for the tensioner pivot arm bolt which has oil on it. Iíve removed the pivot arm and timing belt. There is no oil anywhere else except from one of the exhaust manifold studs and running along the head gasket line and behind the timing belt cover roughly where the pivot is.

When the studs leak is this normally where the oil ends up?

I cannot see anywhere else the oil is coming from.

Cheers
Phil
I chased a very similar oil leak on my 6 for the longest time. Mine was the "castle" shape flat nut sits in behind the lower balance shaft. The o ring had gone hard and split. Timeing belt needs to come off to change it. I only found it with tracer dye as I think the timing belt was slinging it away from the area making it look dry.
It would leak to the bottom of the timing belt cover and onto the the oil filter housing and filter.
Was a nightmare to find that leak as I though those seals had been dont with the timing belt... They hadnt.
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Old 31-03-2020, 19:02   #3
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I chased a very similar oil leak on my 6 for the longest time. Mine was the "castle" shape flat nut sits in behind the lower balance shaft. The o ring had gone hard and split. Timeing belt needs to come off to change it. I only found it with tracer dye as I think the timing belt was slinging it away from the area making it look dry.
It would leak to the bottom of the timing belt cover and onto the the oil filter housing and filter.
Was a nightmare to find that leak as I though those seals had been dont with the timing belt... They hadnt.
I'm going to fit a new oil pump assembly so I will probably have to remove this nut. Is it like an Allen key bolt or just a normal nut? Does it sit behind the front ballance shaft sproket?

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Old 31-03-2020, 19:36   #4
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I'm going to fit a new oil pump assembly so I will probably have to remove this nut. Is it like an Allen key bolt or just a normal nut? Does it sit behind the front ballance shaft sproket?

Cheers
its a basically a cap more than a nut, but it threads on. It is 1/3rd covered by the front balance sprocket.
Wish I had a picture for you.
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Old 31-03-2020, 19:38   #5
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Old 31-03-2020, 19:55   #6
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Thank you for your help.
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Old 01-04-2020, 17:05   #7
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Did you use the special tool to remove the castle cap or just gently tap it around.

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Old Yesterday, 02:23   #8
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Did you use the special tool to remove the castle cap or just gently tap it around.

Cheers
Just gentle tapped around it. Then I used a home made tool made from a brass plug to tighten it. But to be honest you could use a good set of needle nose pliers to tighten and then some gentle taps to tighten. I think the torque spec is quite low on it.
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