answersLogoWhite

0


Best Answer

If oil continuously blows out the crankcase vent tube (more than a drop now & then) it could mean either the oil tank is overfilled or the breather gear's timing mark is misaligned with the cam gear's mark.

If the crankcase only spews oil when the bike is started after sitting unused for a few days, then it means oil is seeping from the tank into the crankcase due to the check valve in the oil pump either having a speck of dirt holding it partially open or having a damaged ball and/or seat.

User Avatar

Wiki User

13y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What would cause oil blow-by to the ventilation tube on a 1973 Harley FXE?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What would cause oil filter cap to pop off while driving?

blocked pcv or excessive piston blowby..


I have an 1982 Harley Sturgis and it has started coughing back what would cause this?

intake manifold leak


How would you define the term ventilation?

ventilation is the degree of something


What would cause oil blowback out of the dipstick and PVC on a Chevy truck with a 350 engine?

Sounds like something in the ventilation system is plugged causing negative pressure. Engines that are worn, have not had oil changes on schedule or have been running "lean" can have some serious problems. If rings wear or if the ring groove is fouled with tar (burned oil) the rings may not be able to provide an adequate seal against the cylinder walls. If the exhaust gas can leak past the piston rings there will be a buildup of exhaust gas pressure inside the crankcase. The condition is called "blowby". The PCV valve assembly cannot possibly keep up with the exhaust gas that leaks past the piston if you have blowby. Unfortunately, severe blowby can push against the crankshaft seals causing the engine to leak oil.


What would cause the negative battery cable on your Harley-Davidson to fry?

Take it to an experinced mechanic and do not pass go!


What would cause smoke to come out of a oil cap?

This is called blow by. Caused by a defective crankcase ventilation system or worn rings.


What was a trapper in a mine?

Someone whom would sit in a confined area and open and close the door when a cart of coal came, this would cause ventilation in the mines.


Can a clogged catalytic converter cause oil blow by?

Maybe but more likely its the other way around. Oil blowby will ruin the converter quickly. Perhaps if the check engine light was on & the engine quickly replaced then the converter would still be good. A clogged cat will just rob performance & the engine might not start. The oxygen sensors abre probably ruined from the oil blowby too.


What would cause oil to be splattered under hood of a 2003 kia sedona?

blowby caused either by worn or broken piston rings and or valves May want to check for missing dipstick, oil filler cap etc.


What kind of ventilation would you need in your kitchen if you want to do indoor grilling?

Downdraft ventilation would be the smart option for an indoor grill.


What is passive ventillation?

Passive ventilation is a system of ventilation which requires no mechanical parts. for example, one could ventilate a room using a powerful exhaust fan, and that would be mechanical ventilation. Or one could simply open a couple of window's that would be passive ventilation.


Is there a sissy bar from another Harley that would fit the Harley Davidson Sportster?

harley Meyer is awsomely awsome