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different types of engines..

As some of you may know I'm swapping out my 2.25 petrol engine. The "old" engine had a combined oil filler/breather cap, yet the "new" one (which Im told is an earlier type of engine but still a 3 MB) has the oil filler at the side with a seperate breather.

Becuase I'm porting over my air filter, I'm planning to take the side oil filler pipe off, blank it off with the blanking plate from the old engine and then use the cap/breather thats attached to the air filter.

Is this OK to do or are there issues I should be aware of?

thanks a lot, Paul

Reply to
Pacman
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This engine has a number of different engine breather setups, but there are basically two - one with a side pipe with a breather on it and another breather on top of the rocker cover, the other with a positive crankcase ventilation valve into the sump via a hose onto the side plate and a pipe from the rocker cover to the air cleaner inlet elbow and just a filler on the side pipe. In both cases there is provision for a flow of air through the internals of the engine as well as a pressure relief. Without this you will get condensation within the engine especially in a damp climate and for short runs. Where the oil is added is immaterial, but you must have two points of ventilation, top and bottom, and they must have some form of air cleaning (if one has PCV it is not necessary to have this one filtered). JD

Reply to
JD

ah, my old engine had a pipe going into the sump, and a pipe from the rocker cover cap to the air cleaner elbow.

Can I have a breather on the oil filler pipe cap, and a pipe on the rocker cover cap going to the air inlet pipe? Otherwise, I'll have a hole in my air cleaner pipe...unless I shut it off of course....

Reply to
Pacman

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