crankcase pressure
06-05-2003, 01:05 AM
#1
0.5 BAR
Thread Starter
Join Date: Apr 2003
Posts: 182
crankcase pressure
I have my turbo on for a week now. I have noticed smoke coming from my breather filter on the valve cover. Tonight I noticed I have been blowing out my dipstick out of the tube. What could be causing this? Is it bad for the motor? It never did this without the tuurbo.
I have replaced the PCV valve also.
I have replaced the PCV valve also.
06-05-2003, 08:39 AM
#2
0.5 BAR
Join Date: Apr 2003
Posts: 187
Re:crankcase pressure
Do a compression test. My bet is broken ring landings. It will always smoke out of the breather with broken ring lands because the boost is blowing by the pistons into the crankcase which is why you are blowing out your dipstick also. Sorry. 
06-05-2003, 10:05 AM
#4
0.5 BAR
Join Date: Apr 2003
Posts: 187
Re:crankcase pressure
The ring landings are the material between each piston ring. On stock pistons they are very weak and any little bit of detonation will usually break them. As far as expense, pistons usually go anywhere from $350 to about $500. You can get good deals if you look around real good. You can build the motor in the car. Just pull the head and drop the oil pan. Depending on mileage of your car you will probably have to hone the cylinders at least.
06-05-2003, 11:25 AM
#5
3.0 BAR
Join Date: Dec 2002
Posts: 3,396
Re:crankcase pressure
High crankcase pressures are normal for any boosted car running high RPM's, that is why it is essential to have the necessary evacuation system, with either a beefed up PCV system, or a seperate catch can setup. (Or both)
u dont need new pistons. just replace the rings and hone the cylinders. hehe fun fun
u dont need new pistons. just replace the rings and hone the cylinders. hehe fun fun
06-05-2003, 01:37 PM
#8
3.0 BAR
Join Date: Apr 2003
Posts: 11,058
Re:crankcase pressure
how would you hook up a catch can? i had one on my old b18a, but there isn't one on my b18b. it looked like it had a hose directly under the pcv valve (on the intake runner) and then it had another hose going back into the block
? do you have to tap into your block?? and now my pcv valve is on the valve cover
? do you have to tap into your block?? and now my pcv valve is on the valve cover
06-06-2003, 10:30 PM
#10
1.5 BAR
Join Date: Dec 2002
Location: Nashville
Posts: 807
Re:crankcase pressure
the answer to your question depends on what you're using for fuel management and how well it's tuned. Most of us on here know that the stock D rods can hold 15 psi if tuned properly, but I'm keeping mine below 8 just for the sake of my 183k mile a6 motor.
