T25 Missing Piece on Engine - any ideas?

[paulnice]

Hey!

Slightly odd post - my T25 started leaking oil and so I took it to mechanic. The mechanic located the leak - there is a missing *something*, but will not fix until I find out what *something* is.

The below images show where the leak is (red square) - it's on the top of the engine. There is a hole, with thread, where something has come out. Oil slowly flows out of this hole when the engine is running.

Is it just a plug hole? Or should something (a pipe?) be feeding into this threaded hole?

The van is T25 Aircooled 2ltr petrol engine.

v1.jpg

v3.jpg

[djaychela]

Er..... Are you sure that's air cooled? Looks to be a number of pipes in the pictures, no tinware,etc?

I would change the title to reflect the engine type, from the engine number. Might get more help then.

[marlinowner]

Not sure about the threaded hole as I don't have that engine (yours is water cooled by the way), its shown as a threaded hole in the Haynes manual, nothing fitted there, but the oil breather pipe between the oil tower and the carburettor plenum is kinked and also it's the wrong material, heater hose, which may soften. If that pipe is blocked then the crankcase can pressurise and cause oil leaks.

[itchyfeet]

water cooled 1.9 DG
nothing fits there

[a1winchester]

the oil breather pipe between the oil tower and the carburettor plenum is kinked and also it's the wrong material, heater hose, which may soften. If that pipe is blocked then the crankcase can pressurise and cause oil leaks.

I recently replaced mine for this reason. https://www.brickwerks.co.uk/t3-parts/t ... bx-dg.html

It says the original part (VW) collapses, so may be the original material.

[itchyfeet]

Best check the coolant level ASAP, if you didn't know it was watercooled then presumably you never checked it.

[R0B]

How come your mechanic did not notice the obvious kink in the breather pipe.?

[itchyfeet]

Back to the problem in hand, this is an M10 threaded hole, I have tried to take a pic to show this.

This is not really near any pressurised oil gallery and up high so not sitting on oil.

I suppose somebody could have drilled it before but looking at where it is I doubt you could drill through without drilling very deep, casing could be cracked but I wonder if it's an optical illusion, it's common for the distributor and oil pump to leak and oil to collect here.

I suggest careful cleaning and check, if it is genuinely leaking from here the only fix I can think of is an M10 bolt and a copper washer.