B20 VTEC Problem..Help!!
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B20 VTEC Problem..Help!!
I have a B20 VTEC in a 1998 Civic. It is a 2000 B16 head and a 1998 B20 Block. The guy that built it for me did a great job and has never had problems with them. I have ahd it for 2 years and never had a problem that i didn't cause. Well the problem now is that I have a breather bottle with 2 lines and a drain line attached to it. I was told i need to have this. anyways ion the top of the bottle is a big breather instead of having a PCV valve. Well the other day it started to blow massive amounts of oil out the top of the bottle and spray everywhere. No one can seem to find an answer for this so does anyone have any ideas. Thanks for the help.
#4
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
It sounds like your crank case is getting pressurized. I usually see that if the rings are gone or someone has connected their valve cover breather line to their charge pipe on a turbo engine. What are your compression and leakdown numbers?
#6
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
Blown head gasket would do it too, but I'd think you would see other symptoms. 180 is probably fine, but you really need to get a leakdown test done. That will tell you where your compression is going.
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Re: B20 VTEC Problem..Help!! (rmcdaniels)
I think it is the headgasket becuase in the front of the motor it looks like it is leaking a little bit. The motor runs very strong and doesn't smoke at all so thats why i think it could be the headgasket. It is something that just started overnight and haven't been able to figure out what it is
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#8
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arrival Civic »</TD></TR><TR><TD CLASS="quote">I think it is the headgasket becuase in the front of the motor it looks like it is leaking a little bit. The motor runs very strong and doesn't smoke at all so thats why i think it could be the headgasket. It is something that just started overnight and haven't been able to figure out what it is</TD></TR></TABLE>
Get that leakdown test. Before I got a leakdown tester I used to pay a guy $75 for it, but if you have air then I think a leakdown tester is about $75 from Summit.
Get that leakdown test. Before I got a leakdown tester I used to pay a guy $75 for it, but if you have air then I think a leakdown tester is about $75 from Summit.
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
I think your rings are gone or your pistons are cracked or both. Not to be nagative cause I know you want it to be the head gasket but that's what it is.
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Re: B20 VTEC Problem..Help!! (UNDER PRESSURE)
how could it be the rings or pistons when the compression is good, there is no smoke and the car runs great. If i had a cracked piston i don't think the car would run strong at all and i know when rings are bad the car would smoke and mine does none of that????
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Re: B20 VTEC Problem..Help!! (Falqon)
i don't know what it is thats why i am asking people that know more about this than me for what they think but i don't think it could be the pistons or rings if there is no smoke and it runs fine
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
what breather is it that you are using? did you relocate it before it started doing that?
Modified by 96MidoriHatch at 5:44 PM 10/6/2004
Modified by 96MidoriHatch at 5:44 PM 10/6/2004
#15
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
On a N/A engine the only source of air pressure is the compression in the cylinders.
Your breather bottle is connected to your crankcase, so if oil is blowing out the top of it then your crankcase is getting pressurized.
The only way to tell how the pressure is getting from your cylinders to your crankcase is to get a <U>LEAKDOWN TEST</U>.
Static compression can be misleading, I've seen setups with >10% leakdown that still had acceptable static compression readings.
Your pistons have compression rings and oil sealing rings. They do not both have to be bad at the same time. You can be losing air past the compression rings and not burning oil.
Your breather bottle is connected to your crankcase, so if oil is blowing out the top of it then your crankcase is getting pressurized.
The only way to tell how the pressure is getting from your cylinders to your crankcase is to get a <U>LEAKDOWN TEST</U>.
Static compression can be misleading, I've seen setups with >10% leakdown that still had acceptable static compression readings.
Your pistons have compression rings and oil sealing rings. They do not both have to be bad at the same time. You can be losing air past the compression rings and not burning oil.
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Re: B20 VTEC Problem..Help!! (rmcdaniels)
well i did the leakdown test tonight but i didn't have the proper tester but was able to use the line on the compression tester and the air compressor. I was told to listen for air in the crankcase and when i take the oil cap off i could hear plenty of air in the head. i was told that it could be the rings or the head gasket. Am i correct in this???
And thanks to everyone for the help
And thanks to everyone for the help
#17
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
There will always be some leakage, my leakdown is 2-3% and if I pressurize it to 100 PSI I get a nice little breeze out of my crankcase breather. Typically if the headgasket is bad the air will also leak into the cooling system or adjacent cylinders. Try it with your radiator cap off to see if it leaks to the cooling system. Also remove adjacent plugs and check for air, I'd use a small hose as a stethescope to check this.
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Re: B20 VTEC Problem..Help!! (rmcdaniels)
actually i did have the radiator cap off and i did not see any bubbles in the radiator but did get air coming out of other cylinders but there was a lot of air when we had the oil cap off
#19
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Re: B20 VTEC Problem..Help!! (Arrival Civic)
The leakage from the other cylinders could also be from the intake valves, make sure to hold the throttle plate open and see if less comes out of the other cylinders and air comes out of it. Barring intake valve leakage if you have excessive air coming out of the oil cap then your compression rings are probably leaking. With out a differential gauge like the one on a leakdown tester it's hard to determine if you have 5% leakdown (not too bad) or 25% leakdown (very bad). One other thing to do is to pour some motor oil, about a teaspoon should be enough, down your spark plug hole and rotate the engine a few times (without starting it). That will temporarily seal the compression ring if it is leaking, then check it again. If you have less leakage, then the rings are the culprit.
I'm assuming that you have your ECU fuse pulled if you are rotating it with the starter. If not, you will be spraying fuel into the cylinders, which will mess up the results of the testing. I'm also assuming that you have each cylinder at TDC of the compression stroke when you pressurize it.
At any rate if most of the air is blowing by the rings then they may be shot. I'd still get a real leakdown tester and check it before I pulled the pistons:
http://store.summitracing.com/...6&y=8
I'm assuming that you have your ECU fuse pulled if you are rotating it with the starter. If not, you will be spraying fuel into the cylinders, which will mess up the results of the testing. I'm also assuming that you have each cylinder at TDC of the compression stroke when you pressurize it.
At any rate if most of the air is blowing by the rings then they may be shot. I'd still get a real leakdown tester and check it before I pulled the pistons:
http://store.summitracing.com/...6&y=8
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Re: B20 VTEC Problem..Help!! (rmcdaniels)
the reason i asked about you moving your breather is because i know of someone who had it too low and it caused this same thing to happen
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