how to look for a leaking crank seal

[jthemmer]

I am loosing air somewhere and have sprayed all over trying to find it during a leak down test. (I cannot hold 6 psi for 6 minutes) Do I have to take off clutch cover and stuff and drain coolant in order to leak down test for the crank seal in order to find it?

[stokes77]

I am loosing air somewhere and have sprayed all over trying to find it during a leak down test. (I cannot hold 6 psi for 6 minutes) Do I have to take off clutch cover and stuff and drain coolant in order to leak down test for the crank seal in order to find it?

 

Double check your intake and exhaust plugs. If you know they are good it could be either clutch or flywheel side. Could start with flywheel so you dont have to drain coolant and oil.

[Nutwood 472]

I am loosing air somewhere and have sprayed all over trying to find it during a leak down test. (I cannot hold 6 psi for 6 minutes) Do I have to take off clutch cover and stuff and drain coolant in order to leak down test for the crank seal in order to find it?

 

 

you can take the vent tubs from the transmission,the one from clutch cover and crank case and stick them in a glass of water and see if they build up pressure and blow bubbles in the water,but if they blow bubbles,it could be crank seal or leak in the crank cases sealant when you put it together,so either way you wont know for sure,i would take ihe clutch cover off and try it again and use a spray bottle of soapy water and see where the leak is...it could be leaking from the crank key that holds the crank gear on...it has happened before,if it doesnt leak from the crank seal or key way,it could be the seal on the cases.

[jthemmer]

This should just be two vent tubes correct? One from the case and one from the cover. I tested both of these and no air leaks. I did find a leak at my exhaust plug though but very slight.

[stokes77]

It dosnt take much to lose a pound a minute. Seal up your exhaust plug and try again.

[Jereme6655]

also the one that alot of people tend to forget is to spray the spark plugs with soapy water.....ive seen multiple times when a set of plugs "seem" to be tight......then you spray em and realize thats where your losing your pressure from...

[jthemmer]

I did space on the spark plugs and good point a leak is a leak. Thanks everyone! Oh but since those vent tubes did not produce any air im good as far as crank seals right?

[knjlexus]

no, you have your seal behind the stator wheel. That is a common leak area.