Oil leak on 240z with a L28 block and transmission?

[Graeme - CZ]

Another thing that occurred to me. I’ve got a 240z with an L28 block / gearbox. Don’t I could tell you precisely what bits are 240 or 280. Does that have a baring on things?


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[jonbills]

Another thing that occurred to me. I’ve got a 240z with an L28 block / gearbox. Don’t I could tell you precisely what bits are 240 or 280. Does that have a baring on things?


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No I don't think that'll make a difference.

 

[Sam_C]

You also need to be careful that you don’t overtighten the bolts on refitting as the sump pan isn’t particularly stiff and you can distort it. I believe that the 280 has separate stiffening plates that help spread the load. Mine had been over tightened and pushed the gasket out causing a leak at the front. It was a bugger to find though. You could clean it up, start up and sit and watch it all day - no leak. Take it out for a good spin, and then there was oil all over the front of the engine. It was happening when I braked - the oil slushed forwards, up the front of the sump pan, and out.

 

[Graeme - CZ]

That's a good point re the bolts. So I have new bolts, new gasket, RTV gasket sealer and Thread Lock.

Do I need to use a torque wrench on the bolts, if so what is the measurement (nm)? Also, I believe there is a pattern for tightening the bolts. Does anyone have a diagram of that? (something like this)

Thanks, Graeme

 

[strugrat]

Think I’ve tracked down the leak to the sump cover / seal. Now just need to suss out the removal / refit process. Any further tips on that?

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Are you sure its the sump gasket? There is no pressure in there really. I had a leak in the exact same place and thought the same as you.

Turns out it was leaking from the oil pump/block/front cover triple joint and running down the sump pan (the engine is titled back ever so slightly) and eventually dripping from the location you've highlighted.

Just a thought!

 

[Graeme - CZ]

Are you sure its the sump gasket? There is no pressure in there really. I had a leak in the exact same place and thought the same as you.

Turns out it was leaking from the oil pump/block/front cover triple joint and running down the sump pan (the engine is titled back ever so slightly) and eventually dripping from the location you've highlighted.

Just a thought!

Hi. Ok, that's a good point and worth double checking. Thanks for the tip. G

 

[jonbills]

That's a good point re the bolts. So I have new bolts, new gasket, RTV gasket sealer and Thread Lock.

Do I need to use a torque wrench on the bolts, if so what is the measurement (nm)? Also, I believe there is a pattern for tightening the bolts. Does anyone have a diagram of that? (something like this)

Thanks, Graeme

it's about 10nm and just doesn't feel enough so do use the torque wrench to stop myself over tightening.
If you do it In a couple of stages and some form of criss cross pattern it'll be fine.