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post #21 of 38 Old May 15th, 2015, 10:29 AM Thread Starter
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Mine loses about 1 quart of oil between oil changes but that doesnt account for residual oil in the heads, pan and filter. I empty my catch can about eveey month or so and it only has about half a cup of oil in it but when I changed my oil yesterday, I noticed that I only lost about 1/2 a quart of oil this time.

When I installed my gt500 tb, the stocker was covered in oil and thats when I decided I needed a catch can.


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post #22 of 38 Old May 15th, 2015, 01:56 PM
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How is oil getting all over the TB when the PCV is behind it? Just wondering how that works cause mine was gunked up before as well.

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post #23 of 38 Old May 15th, 2015, 02:32 PM Thread Starter
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Id like to know myself, the whole back side of the throttle plate was drenched in oil


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post #24 of 38 Old May 15th, 2015, 02:55 PM
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Originally Posted by crackpotfox View Post
I have to empty my jlt every time I get gas. That alone proves to me that it works. I honestly don't know how oil consumption isn't a bigger issue with the 3v.
Thats exactly my experience with my supercharged v6. After about 500 or so miles its 1/3rd full sometimes, it all depends how hard you push the car. My only complaint it sometimes the can itself feels oily, like the O-ring isn't doing that hot of a job.
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post #25 of 38 Old May 15th, 2015, 03:00 PM
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Thats exactly my experience with my supercharged v6. After about 500 or so miles its 1/3rd full sometimes, it all depends how hard you push the car. My only complaint it sometimes the can itself feels oily, like the O-ring isn't doing that hot of a job.
I've never had that, but my kustom sprinkler tubing seems to be leaking just a bit of oil. Gonna have to redo that sometime.

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post #26 of 38 Old May 15th, 2015, 03:02 PM
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I've never had that, but my kustom sprinkler tubing seems to be leaking just a bit of oil. Gonna have to redo that sometime.
The can itself is at an angle but I don't see it being avoidable? been meaning to shoot a bit of the k&n cleaner I have into the mesh filter.. maybe if that filter gets enough oil on it, it will act wonky and promote slow leaks elsewhere when under stress?
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post #27 of 38 Old May 15th, 2015, 03:57 PM
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The can itself is at an angle but I don't see it being avoidable? been meaning to shoot a bit of the k&n cleaner I have into the mesh filter.. maybe if that filter gets enough oil on it, it will act wonky and promote slow leaks elsewhere when under stress?
Do you have they type that has something like steel wool as the mesh? Mine just looks like a cup shape of fine mesh. Doesn't really keep much in the mesh itself, everything falls into the can.

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post #28 of 38 Old May 15th, 2015, 04:58 PM
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Do you have they type that has something like steel wool as the mesh? Mine just looks like a cup shape of fine mesh. Doesn't really keep much in the mesh itself, everything falls into the can.
Havent looked right at it for sometime, I remember it has a metal grill or really open mesh, followed by what looks like steel wool trapped in it acting as the actual filter.
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post #29 of 38 Old May 16th, 2015, 04:51 AM
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Originally Posted by fzr confused View Post
How is oil getting all over the TB when the PCV is behind it? Just wondering how that works cause mine was gunked up before as well.
If you still have the PCV tube going from the passenger side valve cover to the intake pipe, the TB will become oily pretty quickly. The other PCV tube contains a one-way valve and goes from the driver's side valve cover to the intake manifold.
Like I said earlier, your best bet is to isolate the crankcase from the intake system altogether. For N/A applications, a pair of valve cover breathers would suffice but for boosted applications, I'd recommend plumbing in catch cans on both valve covers with breather filters on the open ends of each catch can. You could also use the same set-up on a higher mileage N/A application if oil consumption is higher than normal or if you run the engine hard.


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post #30 of 38 Old May 16th, 2015, 06:38 AM
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Originally Posted by Bullitt95 View Post
If you still have the PCV tube going from the passenger side valve cover to the intake pipe, the TB will become oily pretty quickly. The other PCV tube contains a one-way valve and goes from the driver's side valve cover to the intake manifold.
Like I said earlier, your best bet is to isolate the crankcase from the intake system altogether. For N/A applications, a pair of valve cover breathers would suffice but for boosted applications, I'd recommend plumbing in catch cans on both valve covers with breather filters on the open ends of each catch can. You could also use the same set-up on a higher mileage N/A application if oil consumption is higher than normal or if you run the engine hard.
I was asking about when I was stock setup. When running breathers the system gets reversed I get that, the passenger side becomes high pressure and drivers side becomes low pressure (or whatever terms it is). But in stock form the oil is spit out of the drivers side, which is behind the TB. The TB still gets a coating of oil, how is that so? My current setup is breathers on both sides, nothing touching the intake at all. Running a catch can on both sides with a breather on it is a waste of money, the drivers side will not spit out oil anymore so there is no need for one on that side. A catch can to breather on the passenger side with a breather will contain the oil instead of spitting it onto the valve covers and then onto the header and/or making a mess sure, but doesn't change anything else.

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post #31 of 38 Old May 16th, 2015, 08:00 AM
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Originally Posted by Bullitt95 View Post
If you still have the PCV tube going from the passenger side valve cover to the intake pipe, the TB will become oily pretty quickly. The other PCV tube contains a one-way valve and goes from the driver's side valve cover to the intake manifold.
Like I said earlier, your best bet is to isolate the crankcase from the intake system altogether. For N/A applications, a pair of valve cover breathers would suffice but for boosted applications, I'd recommend plumbing in catch cans on both valve covers with breather filters on the open ends of each catch can. You could also use the same set-up on a higher mileage N/A application if oil consumption is higher than normal or if you run the engine hard.
Why would you install breather cans and still leave the PCV hooked up? That would let in a ton of unmetered air. Either go breathers or install a can. Don't try to do both unless you are just running lines from the valve covers to breather cans with the intake ports capped off.
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post #32 of 38 Old May 16th, 2015, 08:51 AM
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Originally Posted by fzr confused View Post
I was asking about when I was stock setup. When running breathers the system gets reversed I get that, the passenger side becomes high pressure and drivers side becomes low pressure (or whatever terms it is). But in stock form the oil is spit out of the drivers side, which is behind the TB. The TB still gets a coating of oil, how is that so?
That's incorrect. The passenger side doesn't "become" high pressure and the driver's side doesn't "become" low pressure. Both sides of the crankcase have a pulsatile variation of pressure depending on the movements of the pistons and should be more or less equal. However, more oil tends to accumulate at the top of the engine on the passenger side so that side produces more oil vapors. If the passenger side valve cover is connected to the intake pipe in front of the TB, the TB will soon be coated in oil. The solution is to either run a breather alone or a catch can with breather.

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Originally Posted by fzr confused View Post
Running a catch can on both sides with a breather on it is a waste of money
Not a waste of money at all. It's the ultimate solution on a boosted application and also works very well on a N/A application. The driver's side might spit out less oil so you could try initially with a catch can and breather on the passenger side, and a breather only on the driver's side.
If you're still getting a lot of oil in your TB despite isolating the intake system from the crankcase, it's likely to be coming from an over-oiled conical air filter.

---------- Post added at 04:51 PM ---------- Previous post was at 04:49 PM ----------

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Originally Posted by AnotherS197GT View Post
Why would you install breather cans and still leave the PCV hooked up? That would let in a ton of unmetered air. Either go breathers or install a can. Don't try to do both unless you are just running lines from the valve covers to breather cans with the intake ports capped off.
Who said anything about leaving the PCV hooked up?
The idea is to delete the PCV altogether and cap off both intake ports as I did.
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post #33 of 38 Old May 16th, 2015, 12:06 PM Thread Starter
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Thats funny because the drivers side pcv is the one that gets really oily but the passenger side does not at all


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post #34 of 38 Old May 16th, 2015, 01:35 PM
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Originally Posted by Bullitt95 View Post
That's incorrect. The passenger side doesn't "become" high pressure and the driver's side doesn't "become" low pressure. Both sides of the crankcase have a pulsatile variation of pressure depending on the movements of the pistons and should be more or less equal. However, more oil tends to accumulate at the top of the engine on the passenger side so that side produces more oil vapors. If the passenger side valve cover is connected to the intake pipe in front of the TB, the TB will soon be coated in oil. The solution is to either run a breather alone or a catch can with breather.



Not a waste of money at all. It's the ultimate solution on a boosted application and also works very well on a N/A application. The driver's side might spit out less oil so you could try initially with a catch can and breather on the passenger side, and a breather only on the driver's side.
If you're still getting a lot of oil in your TB despite isolating the intake system from the crankcase, it's likely to be coming from an over-oiled conical air filter.

---------- Post added at 04:51 PM ---------- Previous post was at 04:49 PM ----------



Who said anything about leaving the PCV hooked up?
The idea is to delete the PCV altogether and cap off both intake ports as I did.
I'm not sure why you keep thinking that after I went to breathers I was still getting oil on the TB, pretty sure I said twice "with the stock setup". And if you disconnect both sides, you will not get oil out of the drivers side. Have been about 20k on my breathers and the drivers filter is still 100% bone dry. So yes, adding a catch can and breathers to the drivers side is a complete waste of money.

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post #35 of 38 Old May 16th, 2015, 02:37 PM
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Originally Posted by fzr confused View Post
I'm not sure why you keep thinking that after I went to breathers I was still getting oil on the TB, pretty sure I said twice "with the stock setup".
Gotcha.

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Originally Posted by fzr confused View Post
And if you disconnect both sides, you will not get oil out of the drivers side. Have been about 20k on my breathers and the drivers filter is still 100% bone dry. So yes, adding a catch can and breathers to the drivers side is a complete waste of money.
Same here. Driver's side filter is virtually bone dry, passenger filter slightly oily but not enough to prompt me to add a passenger side catch can. I've had them on for 14 months and I clean them every 6 months. The car's done 72k miles.
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post #36 of 38 Old May 16th, 2015, 04:21 PM
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Originally Posted by fzr confused View Post
How is oil getting all over the TB when the PCV is behind it? Just wondering how that works cause mine was gunked up before as well.
Quote:
Originally Posted by 07gtS197 View Post
Id like to know myself, the whole back side of the throttle plate was drenched in oil


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It's just the proximity of the pcv line to the TB.

---------- Post added at 01:19 PM ---------- Previous post was at 01:03 PM ----------

Quote:
Originally Posted by Bullitt95 View Post
That's incorrect. The passenger side doesn't "become" high pressure and the driver's side doesn't "become" low pressure. Both sides of the crankcase have a pulsatile variation of pressure depending on the movements of the pistons and should be more or less equal. However, more oil tends to accumulate at the top of the engine on the passenger side so that side produces more oil vapors. If the passenger side valve cover is connected to the intake pipe in front of the TB, the TB will soon be coated in oil. The solution is to either run a breather alone or a catch can with breather.



Not a waste of money at all. It's the ultimate solution on a boosted application and also works very well on a N/A application. The driver's side might spit out less oil so you could try initially with a catch can and breather on the passenger side, and a breather only on the driver's side.
If you're still getting a lot of oil in your TB despite isolating the intake system from the crankcase, it's likely to be coming from an over-oiled conical air filter.

---------- Post added at 04:51 PM ---------- Previous post was at 04:49 PM ----------



Who said anything about leaving the PCV hooked up?
The idea is to delete the PCV altogether and cap off both intake ports as I did.

More oil does not accumulate on the passenger side. The reason why the passenger side gets more oil with a breather set up is that is the ONLY vent for the crankcase. To prevent this you have to remove the pcv valve from the cam cover. Also putting in an oil cap breather will help also as the gases have another outlet. The drivers side does squat when you go to breathers. You don't even really need to put a breather on there if you don't want to.

---------- Post added at 01:21 PM ---------- Previous post was at 01:19 PM ----------

Quote:
Originally Posted by 07gtS197 View Post
Thats funny because the drivers side pcv is the one that gets really oily but the passenger side does not at all


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It only gets oily if you have the stock PCV system. Once you go to breathers the passenger side will be the oily one.


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post #37 of 38 Old May 16th, 2015, 11:55 PM Thread Starter
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Oh ok gotcha, thanks boss. Eventually Ill switch to breathers and Ill dish out the dough for an oil filler cap breather. I was going to ask about if I needed one too, guess you read my mind lol


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post #38 of 38 Old May 17th, 2015, 06:11 AM
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More oil does not accumulate on the passenger side. The reason why the passenger side gets more oil with a breather set up is that is the ONLY vent for the crankcase. To prevent this you have to remove the pcv valve from the cam cover.
Done that already.
Not sure if this article also applies to the 3V Modular engine but it makes interesting reading:

How to Fix Oil Drain-Back And Windage Problems
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