what's this mean?
#4
Registered
Join Date: Nov 2002
Location: SOUTHERN CALIFORNIA
Posts: 708
Likes: 0
Received 0 Likes
on
0 Posts
Re: what's this mean?
If youve got oil out of your valve covers and smoke from your exhaust is a sign of a worn engine with to much blow by!On the vacum stroke of a cyclinder there is oil being pulled in and burned,on the combustion stroke,the oil is being burned as well as some of the explosion entering the crank are which in now being pressurized and forcing oil out the valve cover vents!Best do a leak down test to find leak percentage of each cyclinder and youll probably hear air from the valve covers which means the rings are bad,broken,or a wall is scored,maybe a hole in the piston!good luck!
#5
Registered
Join Date: Sep 2001
Location: Galloway, NJ
Posts: 299
Likes: 0
Received 0 Likes
on
0 Posts
Re: what's this mean?
Originally Posted by JJONES
If youve got oil out of your valve covers and smoke from your exhaust is a sign of a worn engine with to much blow by!On the vacum stroke of a cyclinder there is oil being pulled in and burned,on the combustion stroke,the oil is being burned as well as some of the explosion entering the crank are which in now being pressurized and forcing oil out the valve cover vents!Best do a leak down test to find leak percentage of each cyclinder and youll probably hear air from the valve covers which means the rings are bad,broken,or a wall is scored,maybe a hole in the piston!good luck!
#6
Registered
Thread Starter
Join Date: Dec 2000
Posts: 552
Likes: 0
Received 0 Likes
on
0 Posts
Re: what's this mean?
Originally Posted by JJONES
If youve got oil out of your valve covers and smoke from your exhaust is a sign of a worn engine with to much blow by!On the vacum stroke of a cyclinder there is oil being pulled in and burned,on the combustion stroke,the oil is being burned as well as some of the explosion entering the crank are which in now being pressurized and forcing oil out the valve cover vents!Best do a leak down test to find leak percentage of each cyclinder and youll probably hear air from the valve covers which means the rings are bad,broken,or a wall is scored,maybe a hole in the piston!good luck!
#8
Registered
Join Date: Nov 2002
Location: SOUTHERN CALIFORNIA
Posts: 708
Likes: 0
Received 0 Likes
on
0 Posts
Re: what's this mean?
Some times Ive added oil to a low comp cylinder just to see if the comp comes up!Its a very prehistoric test but if the comp doesnt come up,its a bad valve,holed piston,if it does come up its a bad ring or two,like,US FOUNTAIN said,oil will seal the cylinders and keep the comp up!
Last edited by JJONES; 11-22-2005 at 10:44 PM.
#10
Registered
Join Date: Nov 2002
Location: SOUTHERN CALIFORNIA
Posts: 708
Likes: 0
Received 0 Likes
on
0 Posts
Re: what's this mean?
if valve seals leak it will let oil into the chamber and it will smoke at start up but the oil out of valve cover vents is normaly combustion pressure blowing past the ring into the crankshaft area,oil pan,which gets pressurized and pumps the oil out! valves seals are a very common seal to go bad but once the engine is running it isnt as evident,only at start up!