Hang on- where's the engine oil filler neck?

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joefuller

Member
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17
Ok, so looking at pictures of some other 2.25D engines (like the one attached) I notice they have an oil filler neck at the left of the engine as you look at it from the front of the bonnet. Mine doesn't have this so I have been topping up the oil from the engine breather cap on top of the rocker cover. There seems to be nowhere else to put the oil into. Are there different evrsions of this engine with different oil fillers?
 

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Some are filled through the rocker box. I think there is a proper mod to do this, believe I may have seen it on Paddocks web page. If you are filling through rocker box does this involve removing the small 7/16" a/f screw in the side? If not you may have the later modified one. Is the engine a 5 main bearing job? You can identify the 5 bearing engines they have diagonal ribs cast in the side of crankcases.
 
My rocker cover has a big oil filler screw cap at the front and no filler at the side.
 
I've got 2 5mb Diesel engines 1980 / 81 and they both have the filler tube. Some by late petrol versions had a separate orange filler top on the rocker
 
There seems to be a real mixture. Both my petrol 2.25s have the orange plastic oil cap on the rocker box (which is a real pain to get the thread started). I think its all to do with which flavour of crank case emissions control is fitted.
 
So I don't have a filler tube on the left hand side of the engine and neither an additional filler cap on the rocker. Could it be that I have to fil oil through the breather? thanks
 

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Most series 3 will have the side filler. 2 / 2a have the filler/breather on the rocker cover with no extra pipes coming from it in most cases. Later engines have the screw filler cap. There is can be quite a mix of ways after all these years.
 
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