C5/X7 2.2HDi leaking metal water pipe from engine block

[citroen since 1973]

Hi guys, I'm after a bit of help please. My 2008 C5/X7 2.2 Tourer is still going strong, but is now owned by my son and he's got a problem. He's been loosing cooling water and overheating. Yesterday, our local garage managed to find the cause, but wouldn't attempt a fix. There is metal pipe coming from the from engine block at the front RH side. This seems to have a welded/braised T piece coming from it at 90 degrees and the join has developed a small hole, leading to a continual drain of the cooling fluid. It looks like a bugger of a thing to get to and because it's very difficult to even see clearly, I have no idea how it's fixed onto the block, or even what the part is called. I was advised that we need to find an engine specialist and he has contacted Telford Engine Centre (near to where I live, he's in Birmingham), who can't look at it for at least a week, but any help would be appreciated please. Thanks, Paul.

[GiveMeABreak]

There are 2 engine variants of the 2.2 engine, pop you VIN up (iw will be masked automatically) so we know what you have.

[citroen since 1973]

Hi Marc, the VIN # is VF7**************[VIN obfuscated, can be read by forum staff], hope that this helps, Paul

[GiveMeABreak]

Ok, so you have the 175 DW12BTED4 engine. Can you identify the pipe from the following 2 pictures which are essentially the same?

(1) Expansion chamber. (2) Coolant pump . (3) Water inlet housing. (4) Exhaust gas/water exchanger. (5) (/) heater matrix. (6) (/) bleed screw(s) . (7) coolant outlet housing. (8) additional heating (according to equipment). (9) engine cooling radiator. (10) (/) coolant/oil heat exchanger.

[citroen since 1973]

I'm sorry Marc, I should have taken a photo of the part at the garage yesterday and the car is now 35m from me! From what I can remember, the pipe wasn't a large one (like a rubber water hose), it was metal, I thought that it came from out of the front of the engine block and from the diagrams above, it may have been 7 - the coolant outlet housing. I'm sorry that I can't be more specific, but please don't spend any more time on it. I do appreciate your help, but I'm not being much use and I thiink that we'll just have to wait until he can get it into an engine specialist. I'll report their findings back here. Thanks, once again, Paul.

[white exec]

Can you identify it from either of these Parts drawings?

? click to enlarge

[citroen since 1973]

Sorry Chris, thanks for your help, but I can't identify it. I'll report back at the end of the week. Thanks, Paul.

[citroen since 1973]

So, update and sorry this is later than I intended. We took the car to our local engine specialist last Friday. The car had been with me overnight, it wasn't a long journey and so wasn't up to temp when we arrived there. Sods law, it wasn't leaking, but there was sufficient evidence from a rusty deposit to show where it was. Turns out that it's a short, metal pipe coming from the cyclinder head, rather than the block, with a 90 degree angle welded/brazed to it. A flexible (rubber?) hose then attaches to this piece. There is/was a leak from the brazed joint (according to the first garage we visited), but it could easily be the hose, which is the more likely culprit. The engine specialist hadn't got time to strip the car down and with a Bank Holiday coming up, plus the certainly, they said, that the local Citroen suppier would not have the part, they advised popping some Radweld in and seeing if this, at least, gave a temporary fix. We did this, the cars been back and forth between Birmingham and Telford over the past few days and all looks well. Fingers crossed and thanks, once again, for all of your help. Also, sorry that I've bothered you about what looks like something pretty trivial. Thanks, Paul.

[GiveMeABreak]

I know this probably got you out of a fix, but I would err on the cautious side of adding anything like that - it has been know to cause later issues with the heating system / matrix if you have any air bubbles / pockets in the system - as this stuff usually solidifies when it finds air....

[citroen since 1973]

OH, not good news, thanks Marc. Would you recommend draining it now, or wait until we can get it booked in for repair, hopefully in a few days time?

[philip_axelsson]

Hi, i saw this and i have the same problem So i was curios to find out if you fixed it and if so, how?

[Peugeoholic]

From the description, the same think has happened to our 2.2 HDi 4007.

The leak is from a metal pipe that is fixed into the head.

The rubber hose is #2 (in the black and white line drawing) connects it to the oil cooler.

The access in the car is not that easy.

It appears that there is either a fault with the welding of the branch, or some corrosion. How is this removed from the head for repair or replacement?

[rym]

From the description, the same think has happened to our 2.2 HDi 4007.

The leak is from a metal pipe that is fixed into the head.


The rubber hose is #2 (in the black and white line drawing) connects it to the oil cooler.


The access in the car is not that easy.



It appears that there is either a fault with the welding of the branch, or some corrosion. How is this removed from the head for repair or replacement?

Hello! My 407 2.2HDI 4HT has started leaking from the same part. Did you manage to repair it? If so, how did you remove it, and do you have a part code for it? It’s my daily driver and at the moment I don’t have time to go to the mechanic, so it’s become quite a hassle to top up the water every 1 to 2 days. Thanks!

Edit: managed to find the part code. It is 0245 47. Also, it seems that the part is fixed on the cylinder head with some type of adhesive, making it hard to remove. Will come with updates once I’ve replaced it

[Gregogo1]

Hi Guys, following the thread above as the same pipe has pin-holed on my car also. Scared the crap out of me when the "overheat" lit up at 30C outside..It takes a month to get this little metal pipe from France to Australia, there are none in this country. So I have the time to figure out how far I have to pull it down to manage to grab the piece and get it out. What else did people have to remove to get to it please?

[rym]

Hi Guys, following the thread above as the same pipe has pin-holed on my car also. Scared the crap out of me when the "overheat" lit up at 30C outside..It takes a month to get this little metal pipe from France to Australia, there are none in this country. So I have the time to figure out how far I have to pull it down to manage to grab the piece and get it out. What else did people have to remove to get to it please?

Hi! I had the luck to find the part on a parts distributors catalogue(ironically, they’re also a domestic distributor, the second option was ordering it from the Emirates, which would have taken a while), and managed to grab the last one they had in stock; it seems to also fit opel and GM cars.
I still haven’t had the time to change it, but most likely I’ll be back by next week with updates regarding this procedure. In order to access it, you need to remove the air filter housing, the thermostat(doesn’t seem necessary but would make the job a whole lot easier, considering that the thermostat can be removed in just 5 minutes), and unscrewing the two bolts holding the oil fillup and bending it to the side. The intake manifold doesn’t seem to get in the way too much.
I’ve seen on a post by a guy from Kazahstan, and even though the language barrier was in the way of completely understanding what he did to replace it, it seemed like it is press fitted in place. From the photos, after the removal(which seems to take a while; his was pulled out in bits), he proceeded to mount it with some black silicone.
Good luck trying to replace it! Some photos with the process would be great. I can’t provide any, I ended up leaving my 407 at a mechanic; I’m doing an suspension overhaul, and it is a pain working under the sun at a 30C weather with the car on jackstands, and also he is the only person I trust to fix my car, it is a hassle to find a proper guy that will not rip you off or do a bad job. Seem to be pretty solid engines, mine has reached 320k kms and besides a weird issue with the throttle pedal, it still gives all it can.