Breathers to VTA mod.
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Breathers to VTA mod.
Ive been asked by a number of people for details of this mod, so this is the simplest way I know of venting the breathers to atmosphere.
Its on a previous thread but the search is broken and its probably way back in the archive.
Credit for this must go to Andy.F, as he talked me through it on his PCV & VTA thread.
The theory behind this mod is to stop the oily blow-by gasses from being recirculated through the inlet pipe and onto the turbo.
These gasses leave oily deposits on the turbo and in the intercooler pipework.
What you need:
About 5m of Halfords hose (12mm)
Sharp Stanley blade
About 6 zip ties
2 large bolts
2 small jubilee clips
Firstly, disconnect the existing breather system.
The two cam breathers are on top of each rocker cover, small black plastic rectangular plate with a barb/nipple pointing upwards. Remove the black hose to each one and take the hose out completely. (ie disconnect the other end from the gold coloured hard pipes as well).
The crank breather is just in front of, and just to the left of the turbo, it’s a small plastic pipe with a 90deg. Dogleg in it.
You can’t see a lot from this picture but it may help you!
http://i16.photobucket.com/albums/b4...nkbreather.jpg
The two cam breathers are on top of the rockers at each side of the engine.
You can see the nearside breather in this picture, the off side one is identical but, obviously on the offside!
http://i16.photobucket.com/albums/b4...ambreather.jpg
Next up, fit the new Halfords hose in place, but make sure they are long enough to tie off down on the ARB.
To get the lengths right, fit the hose over the breather, run it down to the ARB and cut it an inch or two past. Zip tie it at both ends.
You do this for all 3 breathers.
Last stage, blank off the inlet returns. (The following apply to MY99s, I’m not 100% sure it’s the same on earlier models).
http://i16.photobucket.com/albums/b4...letreturn2.jpg
http://i16.photobucket.com/albums/b4...letreturn1.jpg
There are two returns on the inlet pipe that were previously connected to the breather system.
One is between the turbo and the inlet manifold and the other is between the inlet manifold and the power steering reservoir.
Take a small piece of the original hose, give yourself about an inch and a half to two inches and cut it.
Use a jubilee clip to secure a hefty bolt in place and pop it back onto the inlet pipe.
http://i16.photobucket.com/albums/b43/peanuts99/cap.jpg
You have closed off the original system and re routed the vents to atmosphere.
Job done
Andy (a lot of this was from memory, so feel free to correct)
Next week, removing the carbon canister?
Its on a previous thread but the search is broken and its probably way back in the archive.
Credit for this must go to Andy.F, as he talked me through it on his PCV & VTA thread.
The theory behind this mod is to stop the oily blow-by gasses from being recirculated through the inlet pipe and onto the turbo.
These gasses leave oily deposits on the turbo and in the intercooler pipework.
What you need:
About 5m of Halfords hose (12mm)
Sharp Stanley blade
About 6 zip ties
2 large bolts
2 small jubilee clips
Firstly, disconnect the existing breather system.
The two cam breathers are on top of each rocker cover, small black plastic rectangular plate with a barb/nipple pointing upwards. Remove the black hose to each one and take the hose out completely. (ie disconnect the other end from the gold coloured hard pipes as well).
The crank breather is just in front of, and just to the left of the turbo, it’s a small plastic pipe with a 90deg. Dogleg in it.
You can’t see a lot from this picture but it may help you!
http://i16.photobucket.com/albums/b4...nkbreather.jpg
The two cam breathers are on top of the rockers at each side of the engine.
You can see the nearside breather in this picture, the off side one is identical but, obviously on the offside!
http://i16.photobucket.com/albums/b4...ambreather.jpg
Next up, fit the new Halfords hose in place, but make sure they are long enough to tie off down on the ARB.
To get the lengths right, fit the hose over the breather, run it down to the ARB and cut it an inch or two past. Zip tie it at both ends.
You do this for all 3 breathers.
Last stage, blank off the inlet returns. (The following apply to MY99s, I’m not 100% sure it’s the same on earlier models).
http://i16.photobucket.com/albums/b4...letreturn2.jpg
http://i16.photobucket.com/albums/b4...letreturn1.jpg
There are two returns on the inlet pipe that were previously connected to the breather system.
One is between the turbo and the inlet manifold and the other is between the inlet manifold and the power steering reservoir.
Take a small piece of the original hose, give yourself about an inch and a half to two inches and cut it.
Use a jubilee clip to secure a hefty bolt in place and pop it back onto the inlet pipe.
http://i16.photobucket.com/albums/b43/peanuts99/cap.jpg
You have closed off the original system and re routed the vents to atmosphere.
Job done
Andy (a lot of this was from memory, so feel free to correct)
Next week, removing the carbon canister?
Last edited by Peanuts; 29 January 2006 at 02:42 PM.
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Breathers seem to differ very slightly on newage cars (basically the same) so if anyone would like pics of newage breather locations let me know and I'll add them to this thread..
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quick question
do you ever get oil drips on the floor if you leave the car parked up for a whille
I guessing it just goes like the sludge you get in the inlet but worth asking
top write up ..
do you ever get oil drips on the floor if you leave the car parked up for a whille
I guessing it just goes like the sludge you get in the inlet but worth asking
top write up ..
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Right, sorry for the delay..!
Here's the PCV system for newage scoobs:
This pic shows crank and rocker breather hoses flow:
http://i14.photobucket.com/albums/a3...ePCV4Small.jpg
This pics show crankcase (PCV) hose in a little more detail:
http://i14.photobucket.com/albums/a3...ePCV3Small.jpg
Note in the second pic the short hose from the block has a 'T' piece that directs oily vapours (blowby gases) either back into throttle body (TB) or (under boost conditions when TB valve closes) air inlet duct. Hence the oil in the intake/IC pipework..
Jason
Here's the PCV system for newage scoobs:
This pic shows crank and rocker breather hoses flow:
http://i14.photobucket.com/albums/a3...ePCV4Small.jpg
This pics show crankcase (PCV) hose in a little more detail:
http://i14.photobucket.com/albums/a3...ePCV3Small.jpg
Note in the second pic the short hose from the block has a 'T' piece that directs oily vapours (blowby gases) either back into throttle body (TB) or (under boost conditions when TB valve closes) air inlet duct. Hence the oil in the intake/IC pipework..
Jason
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if you use a catch tank do you put all the pipes together and connect them to one port on the tank and then the other port on the tank goes back into the air box?
or do you not plump it back into the airbox?
or do you not plump it back into the airbox?
#17
yeah just done mine all you have to do is connect the left hand breather to the engine vent i did this by buying a 22 to 15 reducer from wickes plumbing stuff copper pipe thing and took out pcv vent out of the engine vent and connected this to a piece of 12 or 13 mm hose and put reducer in to a pcv hose minus pcv t peice and run this via a nother t peice to the right hand rocker cover and then to the catch tank.took me a while but jobs done and no smoke from back when bootedi would not vent back to vta as does not throw back into the intake system.mine you if you want to be eco you can plumb back to the intake
Last edited by Boing; 02 February 2006 at 09:53 PM.
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And what happens at MOT time?
With the ever tightening emissions regs and pressure upon testers, surely this is going to be a no-no? If there is a good enough swirl chamber with suitable pressure drop then the oil will drop out of the airflow anyhow. Should be no need to vta unless your engine is shagged or very highly tuned.
Just wondered about the emission stance.
It's recirc'ed for a good reason?
Steve
With the ever tightening emissions regs and pressure upon testers, surely this is going to be a no-no? If there is a good enough swirl chamber with suitable pressure drop then the oil will drop out of the airflow anyhow. Should be no need to vta unless your engine is shagged or very highly tuned.
Just wondered about the emission stance.
It's recirc'ed for a good reason?
Steve
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my car has had 2 MOT's since this mod and passed both times.
Its recirc'd as standard because that is the most environmentally friendly way to do it, not so engine friendly though.
Im running 1.65bar on an 18g, mildly tuned.
Its recirc'd as standard because that is the most environmentally friendly way to do it, not so engine friendly though.
Im running 1.65bar on an 18g, mildly tuned.
#23
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Originally Posted by M1BJR
And what happens at MOT time?
With the ever tightening emissions regs and pressure upon testers, surely this is going to be a no-no? If there is a good enough swirl chamber with suitable pressure drop then the oil will drop out of the airflow anyhow. Should be no need to vta unless your engine is shagged or very highly tuned.
Just wondered about the emission stance.
It's recirc'ed for a good reason?
Steve
With the ever tightening emissions regs and pressure upon testers, surely this is going to be a no-no? If there is a good enough swirl chamber with suitable pressure drop then the oil will drop out of the airflow anyhow. Should be no need to vta unless your engine is shagged or very highly tuned.
Just wondered about the emission stance.
It's recirc'ed for a good reason?
Steve
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Just had another thought about this mod; what happens if you go through a deepish flooded road. With how the weather seems to be fu@ked up lately you never know when you might face this scenario (sp?) (ie one min dry sunshine and the next monsoon= 5 mins, floods everywhere..!)
Bear in mind that unlike your exhaust a vta can suck air in under certain circumstances..!
Just a thought..!
Bear in mind that unlike your exhaust a vta can suck air in under certain circumstances..!
Just a thought..!
#25
Originally Posted by jasonius
Right, sorry for the delay..!
Here's the PCV system for newage scoobs:
This pic shows crank and rocker breather hoses flow:
http://i14.photobucket.com/albums/a3...ePCV4Small.jpg
This pics show crankcase (PCV) hose in a little more detail:
http://i14.photobucket.com/albums/a3...ePCV3Small.jpg
Note in the second pic the short hose from the block has a 'T' piece that directs oily vapours (blowby gases) either back into throttle body (TB) or (under boost conditions when TB valve closes) air inlet duct. Hence the oil in the intake/IC pipework..
Jason
Here's the PCV system for newage scoobs:
This pic shows crank and rocker breather hoses flow:
http://i14.photobucket.com/albums/a3...ePCV4Small.jpg
This pics show crankcase (PCV) hose in a little more detail:
http://i14.photobucket.com/albums/a3...ePCV3Small.jpg
Note in the second pic the short hose from the block has a 'T' piece that directs oily vapours (blowby gases) either back into throttle body (TB) or (under boost conditions when TB valve closes) air inlet duct. Hence the oil in the intake/IC pipework..
Jason
What about the small pipe at the top on the front of the inlet?
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