7mgte smokes through breather hose
- Thread starter Tyler Chalue
- Start date
Smoke, or steam?
Steam can be condensation being steamed out, or it can be coolant. Condensation happens, and is worse if you make short trips, where you don't let the engine reach operating temperatures. I've seen the oil cap mayo happen in cars used for short commutes, without a BHG. Coolant can come from a BHG, but can also come from cracks in the block, head, throttle body, or ISCV.
Smoke can come from poor oil circulation, where oil is left on a hot surface too long without being replaced. Some WILL come from the cylinder walls, and is in part what the PCV system is there to catch. It can also come from combustion via worn rings.
In any case, smoking "a lot" means trouble. Fix it, and put your PCV system back together right, as not having it certainly didn't help you.
Steam can be condensation being steamed out, or it can be coolant. Condensation happens, and is worse if you make short trips, where you don't let the engine reach operating temperatures. I've seen the oil cap mayo happen in cars used for short commutes, without a BHG. Coolant can come from a BHG, but can also come from cracks in the block, head, throttle body, or ISCV.
Smoke can come from poor oil circulation, where oil is left on a hot surface too long without being replaced. Some WILL come from the cylinder walls, and is in part what the PCV system is there to catch. It can also come from combustion via worn rings.
In any case, smoking "a lot" means trouble. Fix it, and put your PCV system back together right, as not having it certainly didn't help you.
He's talking about engine vacuum. Kind of think of it as the more vacuum you are pulling, the better shape your engine is in. If your rings are shot, you will get a significant amount of combustion gasses that will slip past the rings and build pressure in the crankcase. You should see a solid reading on your vacuum/boost gauge (if you don't have one that accurately reads vacuum as well as boost, get one) with at least 20 inches of mercury. Remember, the higher the number, the more suction you have on the engine and the more efficiently the engine is running. Here is a link that helps with reading gauges. It was helpful especially when I was building carbureted engines years ago.
Hmm, interesting.. So I'm assuming that hose is supposed to connect to that port on the left of the throttle body? I never knew it was supposed to be connected I just thought it vented to the atmosphere. But I suppose ill do a compression test to see if the rings are gone. its not a massive amount coming out but there is a constant flow
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I know what hoses you are talking about just want to know if you have them hooked up to the right thing or just venting to atmosphere.
It's just venting to the atmosphere, nothing connected to the valve cover ports I'm gonna go to the store and get some hose and do it the way it should be then, when I got the car it was just two hoses on the valve cover breather venting to atmosphere nothing connected whatsoever.. I would take a pic but in not with the car at the moment
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Yep that is your issue.and its most likely just oil in the pvc system getting burnt off. Is there an excessive amount of oil?
jdmfreak;1964708 said:
No, I'm talking about inches of water. Used to measure lower pressures than inches mercury because water is less dense (duh). As Pryo kinda said it's about pressure under the valve covers and crankcase, not manifold pressure. The value is an indication of combustion blowby and how well the PCV system is working. For most engines four inH20 would be about the limit.
I see now the OP hasn't the PCV connected. Hope he doesn't make a lot of short trip or if he does changes oil often. Sulfuric acid is not kind to engine parts...
Thanks jj it wasn't like you to make a typo 
which is why I was wondering where would you buy a inH20 meter/tester? Regular parts store?
which is why I was wondering where would you buy a inH20 meter/tester? Regular parts store?
We're talking about manometers. Should be plenty of surplus Dwyer types on ebay but the new electronic ones are cheap enough. It's what I have. Course, 50 cents worth of clear urethane tubing and a bit of water works too...
Okay JJ, I see what you were wanting him to do. I was thinking you were referring to measuring manifold pressure to see the general health of the engine. You are saying to measure crankcase pressure using the manometer. I was all messed up.