Oil breather pipe to air filter
t_tuffnut - June 6th, 2010 at 06:04 PM
Quick question,
I replaced the oil bath on my 1300 bug with an empi sponge filter. The new air filter had a bit to connect it to the oil breather tube built into
it.
Just wondering why? I've seen other engines that have changed to sponge filters and have redirected the oil breather tube down and out of the engine
bay.
Wouldn't the breather tube carry oil up into the sponge and clog it? I've also seen other engine bays where it has been connected, but I can not see
the advantage of doing so.
But hey, I'm no expert - so I thought i'd consult you guys.
Thanks
1303Steve - June 6th, 2010 at 06:09 PM
Hi
If your car was built after 1973 its an ADR not to have crankcase fumes going to the atmosphere. If its an earlier model just put the fumes out the
tube where they normally come out.
Steve
hellbugged - June 6th, 2010 at 06:10 PM
the breather tube adds the vacumn to the crankcase..........very important to stop oil leaks as without pressure builds and oil spills 
t_tuffnut - June 6th, 2010 at 06:17 PM
Mine is a 1966, so it should be fine to have the fumes exit the vehicle through a pipe and out the bottom?
Do I even need to extend the tube past the oil filler?
vw54 - June 6th, 2010 at 07:08 PM
put the oil vent back to the air cleaner wont hurt it
68AutoBug - June 6th, 2010 at 07:46 PM
| Quote: |
Originally
posted by t_tuffnut
Quick question,
I replaced the oil bath on my 1300 bug with an empi sponge filter. The new air filter had a bit to connect it to the oil breather tube built into
it.
Just wondering why? I've seen other engines that have changed to sponge filters and have redirected the oil breather tube down and out of the engine
bay.
Wouldn't the breather tube carry oil up into the sponge and clog it? I've also seen other engine bays where it has been connected, but I can not see
the advantage of doing so.
But hey, I'm no expert - so I thought i'd consult you guys.
Thanks
|
Hi
the hose up to the air cleaner causes a vacuum in the hose sucking up vapours from the engine crankcase.
I also found it will suck up some oily vapours into the foam which made the foam air element partly oily and not good for an air filter.. [unless aK&N]
I did put a smaller piece of hose into the larger hose going to the air filter to try to stop any oil getting onto the foam..
this did seem to work OK...
but I decided to go back to the original VW oil bath air filter..
excess oil in the hose is supposed to go downwards thru the other hose or pipe..
If both these hoses are blocked...
oil will come out of the dipstick hole plus from around the crankshaft pulley...
You will find most old original VW engine bays will have an oily feel to them all over the engine bay...
so, some oil vapour does escape out past the oil slinger on the crankshaft behind the large pulley...
even in a standard VW beetle..
LEE