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Resolved 4g63t, is this normal? And is this where the PCV lines go?

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914 Cheeko

Probationary Member
28
0
Jul 10, 2018
Newtown, Connecticut
So I'm learning about cars on my '91 Galant VR4 with a '95 Eagle Talon TSi turbo swap and I don't know a lot about how an engine bay should look, especially a turbo one. The first pic is on the pipe that goes from the intake manifold to the intercooler. My friend who works on mostly diesel trucks came to look at it and didn't know if this was normal either. Is there supposed to be something covering the hole that the picture was taken through? Something is inside, and I am assuming it is a blowoff valve because it looks like a piston that would move up and down depending on how much pressure there is in the tube.

The second and third pictures are where I think one of the PCV hoses go into? I bought the car with them disconnected and I have no clue where else in the intake manifold they would go into. I can feel holes in the protruding parts but can't see into them so they might be bolts. If that is what they are, would I be able to hook up the PCV lines with a catch can in the middle to it or do the lines have to go directly to the port?
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Solution
First picture is the blowoff valve, that should vent vent back into the intake and recirculate back through the turbo if you're running the stock setup.

Second and third photos are not the PCV system.. third photo shows the holes where the intake manifold support bracket bolts on. Only major vacuum line under the portion you circled in photo 2 goes to the brake booster.
First picture is the blowoff valve, that should vent vent back into the intake and recirculate back through the turbo if you're running the stock setup.

Second and third photos are not the PCV system.. third photo shows the holes where the intake manifold support bracket bolts on. Only major vacuum line under the portion you circled in photo 2 goes to the brake booster.
 
Solution
The first picture is indeed the waste gate, if you are running a pre turbo MAF (mass air flow) sensor then yes that should be piped back into the intake just after the MAF. If you are running a GM blow through MAF or speed density then it can be vented.

As for your second question, since you're car has a swapped engine from a 2G you could use the 2G vacuum diagrams to help determine where the vacuum lines go, Google search 2g dsm vacuum diagram. No they do not go on the bottom of the manifold, the third picture you posted are bolt holes for the manifold stay bracket. There are two lines that are for the pcv, one from the intake manifold to the valve cover and another from the valve cover to the pre turbo intake. Both of those lines are 3/8".

The smaller vacuum lines off the throttle body are for the EGR valve, which based on how the lines are looped and capped tells me the previous owner deleted the EGR system.

Welcome and good luck.

First picture is the blowoff valve, that should vent vent back into the intake and recirculate back through the turbo if you're running the stock setup.

Second and third photos are not the PCV system.. third photo shows the holes where the intake manifold support bracket bolts on. Only major vacuum line under the portion you circled in photo 2 goes to the brake booster.

Man you just beat me to it :D
 
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The first picture is indeed the waste gate, if you are running a pre turbo MAF (mass air flow) sensor then yes that should be piped back into the intake just after the MAF. If you are running a GM blow through MAF or speed density then it can be vented.

As for your second question, since you're car has a swapped engine from a 2G you could use the 2G vacuum diagrams to help determine where the vacuum lines go, Google search 2g dsm vacuum diagram. No they do not go on the bottom of the manifold, the third picture you posted are bolt holes for the manifold stay bracket. There are two lines that are for the pcv, one from the intake manifold to the valve cover and another from the valve cover to the pre turbo intake. Both of those lines are 3/8".

The smaller vacuum lines off the throttle body are for the EGR valve, which based on how the lines are looped and capped tells me the previous owner deleted the EGR system.

Welcome and good luck.

Whats the EGR system? Is it a bad thing that they removed it? Sorry, im a noob.
 
Whats the EGR system? Is it a bad thing that they removed it? Sorry, im a noob.

Exhaust gas recirculation system. Basically it reburns your exhaust gases to reduce emissions. It's federally required on all cars but removed by alot of guys. If where you live has vehicle emissions or inspections you are probably going to want it, unless your car is exempt. Then pollute away!!
 
Exhaust gas recirculation system. Basically it reburns your exhaust gases to reduce emissions. It's federally required on all cars but removed by alot of guys. If where you live has vehicle emissions or inspections you are probably going to want it, unless your car is exempt. Then pollute away!!

So what should I do with the PCV lines? Is it affected by the EGR system? Because they have been pissing oil all over my engine bay. If possible can you post pics of where they connect to the manifold and intake?
 
So what should I do with the PCV lines? Is it affected by the EGR system? Because they have been pissing oil all over my engine bay. If possible can you post pics of where they connect to the manifold and intake?

Post a full pic of your engine bay so we can get a look at how everything is currently routed. I have a feeling there's a few other things out of place.

As for the PCV lines, one goes from the back of the valve cover into the intake manifold just behind the fuel rail, the other goes from the left side of the valve cover into the pre-turbo intake pipe. Neither of these are attached to the EGR system.
 
Post a full pic of your engine bay so we can get a look at how everything is currently routed. I have a feeling there's a few other things out of place.

As for the PCV lines, one goes from the back of the valve cover into the intake manifold just behind the fuel rail, the other goes from the left side of the valve cover into the pre-turbo intake pipe. Neither of these are attached to the EGR system.

First pic is my engine bay, as you can see it's an absolute mess. Second and third pics is some capped tube that's coming from under the intake manifold and inbetween it and the fuel rail. Not sure what it is because i can't see where it goes exactly. But it goes straight down into some big metal piece. Could that be where the PCV line goes? I honestly don't know where else it could go. I've looked up diagrams and videos but I can't figure it out.


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Yeah... Thats definitely a mess... :barf:

That out of the way... The line running from the valve cover to the catch can is what your looking for with the PCV valve. That line typically runs from the PCV valve, to the capped off port you are showing in photos 2 and 3.

There are quite a few other things in the bay that need to be addressed as well, but I'm not in front of a computer to get a good look at the photo currently. I'll follow up later this evening if another member doesn't beat me to it first.
 
Geeeze. That is an entire mess. So many tee'd off lines. Some of which are a no no.

http://www.dsmtuners.com/threads/the-4g63t-pcv-system.366890/

There is a ground on your throttle cable. You could move that to a cleaner spot.

The bottom holes on the intake manifold are for the intake manifold bracket. Not needed.

1g bov looks fine.

I would do a vacuum clean up. Or buy a vacuum block.

A sealed can is also better. The way you have the cans currently, there is an actual quote of why to not do this

"Can I just use one catch can and tie both the PCV valve and VC lines into it?

Not if you want to keep the PCV valve functionality. Remember that air has to travel in two directions between the turbo inlet and VC, while the path between the IM and VC must remain isolated between vacuum and boost.

If you must run only one catch can, put it between the valve cover vent and turbo inlet."
 
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Just wanted to point out that you don't have a 95 motor in there and you might want to remove that grounding cable that's attached to the cylinder head. That bolt/point where it's attached to is an oil galley block off plug.....

Also you have a huge vacuum leak with that hose just dangling on top of the car.
 
Just wanted to point out that you don't have a 95 motor in there and you might want to remove that grounding cable that's attached to the cylinder head. That bolt/point where it's attached to is an oil galley block off plug.....

Also you have a huge vacuum leak with that hose just dangling on top of the car.

Yeah I have no clue why the previous owner did half of the shit he did to this car. Where do I put the grounding cable? And I'm aware I have a vaccum leak I just cant figure out where on the intake and intake manifold I put it in. I've looked up pictures for it but can't see exactly where it goes to
 
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