PDA

View Full Version : breather box on the back of the block



newaccorddriver
05-22-2007, 11:40 PM
well, i looked at the back of the block and saw that my machinist capped it off with a mini frost plug. i cant blame him since i would have done the same since it looks like another coolant hole anyways. well heres my problem, i tried to 'flip' it on its side to take it out, but i accidently knocked it in the block. stupid me...

im not exactly sure what the breather box consists of, but from my point of view, it looks like it drains oil back into the oil pan from within the block itself, and vents off the vapours into the intake manifold. what i find odd is that the engine uses 2 different ways of doing this, one from the breather box on the back, and the PCV valve on the valve cover itself.

im not completely sure on this, but logically, honda would have used more then one route to put oil back into the pan to be sucked up incase one of the lines get clogged somehow. i might be out on a limb here, but theres a little 'flap' that screws in the bottom of the pan, it looks like a little triangle and has a little notch in it to deflect oil in one direction only. would this be the thing that im possibly blocking out? is it possible that the plug i knocked in would he the return line for the breather box? i can see it being possible because there should be baffles in it to collect any oil and the hole i blocked off is simply just a return system for it to be fed back into the block. am i just imagining things, or is that it?

im not sure how honda routed the entire oil system, so i wanna know if im basically stuck with a completely assembled engine that will basically die, or whether its okay to start the engine and use it to its full potential.

shepherd79
05-23-2007, 05:34 AM
actually, that is part of PCV valve. vapors from the oil pan go up to PCV valve and into intake manifold. your machanic just commited $5000 emission crime. all those boxes are there to keep the liquid oil from going into the engine directly.

Blkblurr
05-23-2007, 05:34 AM
Look at the upper left corner of this page of the manual
http://img341.imageshack.us/img341/8797/crankcasecontrolsystemgh7.th.jpg (http://img341.imageshack.us/my.php?image=crankcasecontrolsystemgh7.jpg)

newaccorddriver
05-23-2007, 09:06 AM
actually, that is part of PCV valve. vapors from the oil pan go up to PCV valve and into intake manifold. your machanic just commited $5000 emission crime. all those boxes are there to keep the liquid oil from going into the engine directly.


actually, he plugged it up without knowing it was for an oil passage. i knocked it in the block accidently

newaccorddriver
05-23-2007, 09:09 AM
Look at the upper left corner of this page of the manual
http://img341.imageshack.us/img341/8797/crankcasecontrolsystemgh7.th.jpg (http://img341.imageshack.us/my.php?image=crankcasecontrolsystemgh7.jpg)


by the looks of the picture, it appears as if the vapours go up from the hole that the plug is in. apparently im safe unless there is excessive amounts of pure oil being sucked in which i doubt since there is a 1/8" high hole by 1/4" wide hole for oil to pass through.

thanks for the picture, the service manual i downloaded doesnt have chapter 11 for some reason