Evening all, I was about to do a bit of AM6 preventative maintenance and noticed a leak from the 'heat exchanger' under the drivers side. I can't find it in the BOLs or on servicebox. The water leak is from the front edge, I've not removed the cover to see where exactly. Is this a known issue and can anyone point in the right direction regarding parts diagrams.
Cheers
407 heat exchanger
Moderator: RichardW
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Re: 407 heat exchanger
Which heat exchanger is leaking exactly? Could you get a pic of it?
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Re: 407 heat exchanger
Ok, so best to do a clean and watch session to identify leak and then let me know which are the suspect zones from either of the 2 diagrams:
These are the Coolant Leak Zones for the Engine Circuit:
This is the circuit away from the Engine towards the Radiator
These are the Coolant Leak Zones for the Engine Circuit:
Zone A | Timing face |
Zone B | Coupling face |
Zone C | Exhaust face |
Zone D | Inlet face |
This is the circuit away from the Engine towards the Radiator
Zone "A" | Area of header tank |
Zone "B" | Area of coolant outlet housing - Exhaust gas recycling |
Zone "C" | Area of cooling radiator |
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Re: 407 heat exchanger
This one is horizontal and lies under the floor pan behind the engine on the drivers side. I'll get a photo tomorrow
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Re: 407 heat exchanger
Are you sure that's not the water evacuation drain pipe from the Air Conditioning Evaporator?
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Re: 407 heat exchanger
I hope you're right Marc, I'll check tomorrow and take a pic. Thanks
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Re: 407 heat exchanger
Is it diesel? These have a fuel cooler under the floor that fits your description. Air cooled though, so no water...
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Re: 407 heat exchanger
Yes it is Richard, and having cross checked your comment with the BOLs, yes, it is the fuel cooler that I was looking at thanks for clearing that up. Looks like a radiator on the back of a fridge.
So if the AC drain is near the front of this, that is the 'leak'? I can't find reference to it to confirm. I really hope your right Marc.
I can't get under it today due to the lovely French rain, but I don't think it's necessary now.
So if the AC drain is near the front of this, that is the 'leak'? I can't find reference to it to confirm. I really hope your right Marc.
I can't get under it today due to the lovely French rain, but I don't think it's necessary now.
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Re: 407 heat exchanger
AC drain, item 8
This view is from the front of the car, so the drain appears to exit on the RHS - I assume yours is LHD so it should be on the passenger side somewhere. However, that's not to say it's not running across the subframe and dripping off a low point somewhere. I would check that it's not diesel leaking, however.... but having said that these coolers rarely give trouble.
This view is from the front of the car, so the drain appears to exit on the RHS - I assume yours is LHD so it should be on the passenger side somewhere. However, that's not to say it's not running across the subframe and dripping off a low point somewhere. I would check that it's not diesel leaking, however.... but having said that these coolers rarely give trouble.
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Re: 407 heat exchanger
Thanks very much Richard. Mines a RHD the the positioning would be correct. I held my hand under the drips when I saw them, give them a smell test, definitely water. That puts my mind at rest.
Thanks again to both of you.
Thanks again to both of you.
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Re: 407 heat exchanger
There shouldn't be any difference in these for LHD or RHD - the heating units are the same for both.
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Re: 407 heat exchanger
Indeed, Marc, but it would vary whether the drain was driver or passenger side!!
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Re: 407 heat exchanger
Well it's a flexible hose so can easily be moved by somebody / past mechanic?, but the parts are in the same place and there's no different versions for either model, which was my point really. 
