All Things Mk5 > How to Guides / Troubleshooting
How To: EGR Valve / EGR Cooler Delete Mk5 TDI (BKD / BMN)
alex4y:
Hi guys,
I have the BMN engine and thinking of deleting my EGR cooler as there is a coolant leak behind the engine and I suspect the EGR cooler. I have my EGR valve mapped out, so don't need the cooler anyway. Funny thing is that the slow coolant leak started after the DPF delete and EGR disable.
My question is: how do I get to the EGR cooler? since it is under the turbo and difficult to get to? I was thinking of lifting the car up (I have access to a workshop with proper lifts) and work underneath, taking one of the driveshafts off?
And also, since the cooling system on the BMN engine is slightly different, how do I close the cooling system circuit?
There is an image with the cooling system, with 65 being the EGR cooler:
Any help will be appreciated. Thanks.
AJPowell:
I know this is an old thread, but I wanted to say how much of a help this guide was. I have a mk2 Leon, but the Seat forums were no help at all. First look here and boom, exactly what I was looking for. Think I’ll stay a while, if you’ll have me.
muff1991:
--- Quote from: alex4y on April 19, 2019, 02:10:02 pm ---Hi guys,
I have the BMN engine and thinking of deleting my EGR cooler as there is a coolant leak behind the engine and I suspect the EGR cooler. I have my EGR valve mapped out, so don't need the cooler anyway. Funny thing is that the slow coolant leak started after the DPF delete and EGR disable.
My question is: how do I get to the EGR cooler? since it is under the turbo and difficult to get to? I was thinking of lifting the car up (I have access to a workshop with proper lifts) and work underneath, taking one of the driveshafts off?
And also, since the cooling system on the BMN engine is slightly different, how do I close the cooling system circuit?
There is an image with the cooling system, with 65 being the EGR cooler:
Any help will be appreciated. Thanks.
--- End quote ---
hi mate,
I have the BMN engine in my touran and done the EGR & Cooler delete (but I left the cooler on the engine as couldn't be bothered to remove it - so I advise just to leave it lol) the pipe you need to route is "37" this needs to be disconnected from the cooler and then bent/flexed up to fix onto number "44" coupler which is the Top pipe coming from the bulk head (heater matrix). I believe you have to get a new straight coupler too. the coolant diagram is a pig to make sense of if you ask me, but basically in my own a$$ about face words.. if you go to the right hand side of your engine under the air intake pipe, you'll see the coolant hose coming from the radiator, it goes to the connector block "60" follow it along going towards the back of the engine and you'll see the rubber hose leave the block "60" it instanty ducks and dives under the metal boost pipe. you'll need to follow that and then disconnect it from the cooler and then connect it to the "top" heater matrix pipe. Be careful not to kink it as you don't want to restrict much flow for the coolant. So disconnect hose "43" from "44" coupler and pipe, then connect hose "37" to "44" coupler pipe. I hope this makes sense. I did mine a few years ago and still ok, apart from clip on intake pipe decided to eat a pin prick hole into the hose - silly me should of turned the squeeze points of the clip around so it didn't touch the hose lol shame I didn't see this when doing the job. but its all done and been fine ever since. by doing this, the EGR cooler is then completely bypassed so "closed circuit" again.
alex4y:
--- Quote from: muff1991 on April 25, 2019, 10:33:33 am ---
--- Quote from: alex4y on April 19, 2019, 02:10:02 pm ---Hi guys,
I have the BMN engine and thinking of deleting my EGR cooler as there is a coolant leak behind the engine and I suspect the EGR cooler. I have my EGR valve mapped out, so don't need the cooler anyway. Funny thing is that the slow coolant leak started after the DPF delete and EGR disable.
My question is: how do I get to the EGR cooler? since it is under the turbo and difficult to get to? I was thinking of lifting the car up (I have access to a workshop with proper lifts) and work underneath, taking one of the driveshafts off?
And also, since the cooling system on the BMN engine is slightly different, how do I close the cooling system circuit?
There is an image with the cooling system, with 65 being the EGR cooler:
Any help will be appreciated. Thanks.
--- End quote ---
hi mate,
I have the BMN engine in my touran and done the EGR & Cooler delete (but I left the cooler on the engine as couldn't be bothered to remove it - so I advise just to leave it lol) the pipe you need to route is "37" this needs to be disconnected from the cooler and then bent/flexed up to fix onto number "44" coupler which is the Top pipe coming from the bulk head (heater matrix). I believe you have to get a new straight coupler too. the coolant diagram is a pig to make sense of if you ask me, but basically in my own a$$ about face words.. if you go to the right hand side of your engine under the air intake pipe, you'll see the coolant hose coming from the radiator, it goes to the connector block "60" follow it along going towards the back of the engine and you'll see the rubber hose leave the block "60" it instanty ducks and dives under the metal boost pipe. you'll need to follow that and then disconnect it from the cooler and then connect it to the "top" heater matrix pipe. Be careful not to kink it as you don't want to restrict much flow for the coolant. So disconnect hose "43" from "44" coupler and pipe, then connect hose "37" to "44" coupler pipe. I hope this makes sense. I did mine a few years ago and still ok, apart from clip on intake pipe decided to eat a pin prick hole into the hose - silly me should of turned the squeeze points of the clip around so it didn't touch the hose lol shame I didn't see this when doing the job. but its all done and been fine ever since. by doing this, the EGR cooler is then completely bypassed so "closed circuit" again.
--- End quote ---
Many thanks for the guidelines mate! I lifted the car up again, and traced the hose (40) to find out it goes straight into the bulk head, as you said. I got the straight connector, and will be doing it maybe next week. I wanted to completely remove the cooler (i got blanking plates for that) but might leave it there like you said as it is difficult to get to. Hopefully pipe 37 is ok, as I can't exactly see where it's leaking from. It is very slow leak, I can see drips in that area, and smell the coolant when engine is hot.
Once again thanks.
muff1991:
@alex4y no problem mate, I hope it made sense.. glad you found it ok though. try and get a coolant leak test done with the pressure tool. or do what I did and buy one for £40 as its sooo handy to have! has found a couple of leaks for me on a 230k touran lol if you can get to the cooler and don't mind putting in the work to get it out.. then you might as well make use of the plate.. if not and (like me) you cant be assed :signLOL: then just leave it in situ. Does no harm at all just sat there. Good luck sorting it mate, once it's done you'll be happy.
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