crankcase pressurising big time

dirty skirt · Post by **dirty skirt** » Sun Mar 05, 2006 8:04 pm

g'day all
im having a big problem with my ea81,i put a post in the other day about the timing cause i thought it was only the dizzy o-ring pissing out oil but now its from the dizzy o-ring,sump gasket,rocker covers basically everywhere possible.its pressurising the crankcase big time(talking about taking dipstick out and nearly hits you in the forehead).
Now ive checked the valve on the inlet manifold that holds the hose comin from thehose that joins to the rocker covers.it was blocked but i freed up and is working fine now
ive also done a compression test and has 1275 kpa in all for cylinders.
ive also did the same test but with oil in them and they were 1325 kpa in the 1st 3 but in the 4th it had 1310kpa,to me they are perfect.
can anyone help me out has anyone had the same happen to them or seen this happen.i dont have a oil pressure tester so i cant do that,the car runs perfect but uses a tiny bit of coolant.
if any one can help that would be very very appreciated
thanks steve

MUDRAT · Post by **MUDRAT** » Sun Mar 05, 2006 8:29 pm

Is it a real EA81 turbo or is it a conversion?

dirty skirt · Post by **dirty skirt** » Mon Mar 06, 2006 5:56 am

its a ea81 n/a in a 84 wagon

Suba · Post by **Suba** » Mon Mar 06, 2006 12:30 pm

Has the problem stopped since you cleared the breather valve [pcv].

Mike.

MUDRAT · Post by **MUDRAT** » Mon Mar 06, 2006 3:17 pm

My bad, I thought you said EA81T.

dirty skirt · Post by **dirty skirt** » Mon Mar 06, 2006 5:44 pm

no it hasn't i was wondering if it has anything to do with how much compression it has it seems to be a lot but i dont know if thats a normal combustion pressure for a subaru

Suba · Post by **Suba** » Mon Mar 06, 2006 5:59 pm

Whats 1275 kpa in psi, the usual reason for excesive crankcase pressure is blow by caused by worn rings or burnt piston.

Mike.

dirty skirt · Post by **dirty skirt** » Mon Mar 06, 2006 6:43 pm

i re tested and it has 160 psi on a different compression tester (1175kpa)

MUDRAT · Post by **MUDRAT** » Mon Mar 06, 2006 7:07 pm

Compression test is spot on.

How can you be sure your PCV valve is working?

dirty skirt · Post by **dirty skirt** » Mon Mar 06, 2006 7:37 pm

cause when i cleaned it it was moving freely and then i could blow through it and it was allowing it to move nicely

MY_STI · Post by **MY_STI** » Mon Mar 06, 2006 8:43 pm

Check your breather hoses, I haven't had this problem on an N/A, but i have pulled off breather hoses that black crap just seems to keep coming out of, if these are blocked it wont help much.

You should only be able to blow through the PCV valve from the hose end not the threaded end, probably not so critical on an N/A though

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Mon Mar 06, 2006 10:32 pm

There is a small felt like filter in the air cleaner housing, if that gets dirty enough to block it it will prevent the proper working of the PCV system

dirty skirt · Post by **dirty skirt** » Tue Mar 07, 2006 5:32 pm

i have a weber with a custom intake and snorkel and stuff