407 heat exchanger

This is the Forum for all your Peugeot Technical Questions, Problems or Advice.

Moderator: RichardW

Post Reply
User avatar
moizeau
(Donor 2022)
Posts: 1579
Joined: 12 Jan 2015, 16:08
Location: France 36
My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped)
x 314

407 heat exchanger

Post by moizeau »

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
Pete
Notice the BX is still top the list but sadly gone
User avatar
EDC5
(Donor 2020)
Posts: 1216
Joined: 01 Jul 2017, 21:48
Location: N. Wales
My Cars: Citroen C5 RHR AM6
x 120

Re: 407 heat exchanger

Post by EDC5 »

Which heat exchanger is leaking exactly? Could you get a pic of it?
User avatar
GiveMeABreak
Forum Admin Team
Posts: 36990
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5644

Re: 407 heat exchanger

Post by GiveMeABreak »

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:
Pete Leak A.PNG
Zone ATiming face
Zone BCoupling face
Zone CExhaust face
Zone DInlet face

This is the circuit away from the Engine towards the Radiator
Pete Leak B.PNG
Zone "A"Area of header tank
Zone "B"Area of coolant outlet housing - Exhaust gas recycling
Zone "C"Area of cooling radiator
Please Don't PM Me For Technical Help

Marc
User avatar
moizeau
(Donor 2022)
Posts: 1579
Joined: 12 Jan 2015, 16:08
Location: France 36
My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped)
x 314

Re: 407 heat exchanger

Post by moizeau »

This one is horizontal and lies under the floor pan behind the engine on the drivers side. I'll get a photo tomorrow
Pete
Notice the BX is still top the list but sadly gone
User avatar
GiveMeABreak
Forum Admin Team
Posts: 36990
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5644

Re: 407 heat exchanger

Post by GiveMeABreak »

Are you sure that's not the water evacuation drain pipe from the Air Conditioning Evaporator?
Please Don't PM Me For Technical Help

Marc
User avatar
moizeau
(Donor 2022)
Posts: 1579
Joined: 12 Jan 2015, 16:08
Location: France 36
My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped)
x 314

Re: 407 heat exchanger

Post by moizeau »

I hope you're right Marc, I'll check tomorrow and take a pic. Thanks
Pete
Notice the BX is still top the list but sadly gone
Abdul
Posts: 15
Joined: 25 Oct 2019, 18:21
Location: Nigeria
My Cars: 406 206 307 407 408 4008 1007 206cc 106 508 5008 3008 207 citroen car etc

Re: 407 heat exchanger

Post by Abdul »

Check the water pump
RichardW
Forum Treasurer
Posts: 10812
Joined: 07 Aug 2002, 17:12
Location: United Kingdom
My Cars: MK2 '17 C4GP 1.6 BlueHDi 120
'13 3008 1.6 HDi GripControl
x 982

Re: 407 heat exchanger

Post by RichardW »

Is it diesel? These have a fuel cooler under the floor that fits your description. Air cooled though, so no water...
Richard W
User avatar
moizeau
(Donor 2022)
Posts: 1579
Joined: 12 Jan 2015, 16:08
Location: France 36
My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped)
x 314

Re: 407 heat exchanger

Post by moizeau »

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.
Pete
Notice the BX is still top the list but sadly gone
RichardW
Forum Treasurer
Posts: 10812
Joined: 07 Aug 2002, 17:12
Location: United Kingdom
My Cars: MK2 '17 C4GP 1.6 BlueHDi 120
'13 3008 1.6 HDi GripControl
x 982

Re: 407 heat exchanger

Post by RichardW »

AC drain, item 8
heater.JPG
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.
Richard W
User avatar
moizeau
(Donor 2022)
Posts: 1579
Joined: 12 Jan 2015, 16:08
Location: France 36
My Cars: 91 BX TZD Estate. Dead but loved
407 HDI 136 auto
C4 2l petrol coupé
2010 Dispatch III HDI 90
AND a 1980 Z1000ST
AND a 1983 GPz1100 inj
AND a 1995 Zephyr 1100
AND a 1980 Z650 (my moped)
x 314

Re: 407 heat exchanger

Post by moizeau »

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.
Pete
Notice the BX is still top the list but sadly gone
User avatar
GiveMeABreak
Forum Admin Team
Posts: 36990
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5644

Re: 407 heat exchanger

Post by GiveMeABreak »

There shouldn't be any difference in these for LHD or RHD - the heating units are the same for both.
Please Don't PM Me For Technical Help

Marc
RichardW
Forum Treasurer
Posts: 10812
Joined: 07 Aug 2002, 17:12
Location: United Kingdom
My Cars: MK2 '17 C4GP 1.6 BlueHDi 120
'13 3008 1.6 HDi GripControl
x 982

Re: 407 heat exchanger

Post by RichardW »

Indeed, Marc, but it would vary whether the drain was driver or passenger side!!
Richard W
User avatar
GiveMeABreak
Forum Admin Team
Posts: 36990
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5644

Re: 407 heat exchanger

Post by GiveMeABreak »

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. :)
Please Don't PM Me For Technical Help

Marc
Post Reply