If i take dry compression of a car & it comes below standard.Then i take wet compression of a car & it again remains same. It means that the valve seat is worn out.How can i tell that its an Intake valve or exhaust valve?? Any expert there?
@Troubleshooter..........
How would you like to know it? Without pulling (dismentling) the head out? or After pulling the head?
You need to perform a leakdown test to determine whether the intake or the exhaust valves are at fault.
Look here on how to perform a leakdown test.http://www.aa1car.com/library/leakdown.htm
why do you want to know this beforehand?
Its a leaking valve and needs rework, doesnt matter which one. Thats my opinion
@Whiteanegle.
Thank you for posting a good link. I have learned a new thing from PW after a very very long time
@Spectra..........
Dont you noticed? we have a lots of tallents in our members, just need to lead them in a right direction....
Thats why I put the question "How would you like to know it? Without pulling (dismentling) the head out? or After pulling the head?"
I wanted to know without dismantling the head.Today i got the answer.Its a desi method.Put few pieces of paper at the exhaust after starting the engine.If any of the exhaust seat will be leak then the pieces of paper will tend to go a little bit inside the exhaust due to suction affect.If it doesnt happen then it means then intake seat is leak.
good info bhai
Very good thread!.I'm learning something new!...Thumbs up!..
@Troubleshooter...........
Never came accross the method you hv described, and also not convincing for me atleast.
Proper way is a compression test and followed by a pressure test, as explained in the link provided by Whiteangel.
I dont a peice of paper can be sucked in (even a little bit) when 3 out of four exhaust valves are throwing air out to come out of the exhaust (2 at a time) and one is making a minor effort for sucking it in. But still 10/10 for creativity and out of the box thinking.