Hello everyone! Sorry for the stupid question but I'd rather be safe than sorry. This is my 318 in a 72 dart. Just got the car and I'm doing an oil change for the first time. Both valve covers have a breather filter on them, as circled in the pic below. Which breather needs to be taken off to fill with oil? Driver side or passenger side? Or could you put oil in on either side? I know one side is for PCV, but I don't know whether you can fill it in on either side or not. I guess either way it's going to the valvetrain, but just want to be safe. Thanks everyone and happy holidays!
Oil Fill
- Thread starter 340 RR
- Start date
-
QWKSLVR
Well-Known Member
It makes no difference, either side is fine. Happy holidays to you as well.
Bobby
Bobby
JDMopar
Well-Known Member
You forgot to attach the pic, but put the funnel in the biggest hole and pour it in. It will end up in the oil pan from either side. It should take 5 quarts with a filter change.
JDMopar
Well-Known Member
Looks pretty much the same size hole in both valve covers, so I'd pick the easiest one to work with. I'm guessing that the passenger side will offer more working room.
Doesn't matter. What DOES matter is, you're missing all of your PCV system. You need a pcv valve in one valve cover and the crankcase breather in the other.
Be careful as the oil can back up quick and run out the hole in the valve cover. Pour it in slowly.
Wasn't aware of that, thank you for letting me know. I figured the crankcase breather on one of the sides was acting as the "ventilation" part of the PCV acronym. Basically just letting it go to the atmosphere instead of rerouting it. And the port on the carb for the PCV was plugged. So I just left it. I will add a PCV valve in one of the valve covers and route it to the carb port. Thanks!
Yes I went real slow and didn't see anything come back up and out the valve cover. Thank you for the advice
ah I see, this makes sense. I always learn so much whenever loading up this site. I'll get right on fixing that. Thank you RRR and all!
Would it be better to remove the other breather as well and just put a regular oil cap? That way there can be a bit more pressure within the system. If that even makes sense. Or does it not matter which one you use.
It needs to be just like the diagram above.
Okay, I'll fix it just like that. Thanks!
The reason for that is, it's not about pressure, but vacuum. The crankcase needs to be under a vacuum. It keeps the crankcase free of extra oil mist and also helps the rings to seal since it relieves crankcase pressure on the back side of the rings. It's important.
-
Similar threads
- Locked
