External transmission cooler for 505
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  1. #1
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    Default External transmission cooler for 505

    On the weekend, I fitted an external transmission cooler to the 505STI. The main reason was that the original transmission lines were both leaking at the pipe connections under the box, and I had the cooler ready fitted with some newish hoses. It fits snugly in front of the AC fan housing tight up beneath the top panel. I might post some pics later if anyone's interested.

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    It's a pity one couldn't do this with the 306, which has the cooling principle the opposite way around where the coolant runs through the transmission rather than the other way round to the 505. One of the main reasons for the failure of many earlier 306s, including our 1996 SR, is the corrosion in the metal housing which lets coolant into the transmission. Has anyone done any such conversion on a 306? Also, is the principle similar for the 405 or 406 for instance?
    1998 Peugeot 406 D8SV Manual
    1999 Peugeot 406 D8ST Auto
    2002 Peugeot 406 D9SV Manual
    1994 Peuegot 306 N3 Cabriolet Manual
    1994 Peugeot 306 XR N3 Hatch
    1995 Peugeot 505 GTI executive
    1976 Peugeot 504 Sedan - Now sold

    Over 60 Pugs in my time
    Gerry Mullock

  2. #2
    Fellow Frogger! TassieExec's Avatar
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    Hi Gerry, I would be keen to see how you did it as I have often considered fitting one to my car, one reason I haven't is my concern about using hose clamps on the hoses at the cooler as most seem to do, seems inadequate compared to the banjo fittings on the standard hoses which I've found need to have good washers and be really tight. Have you noticed any difference in the engine temperature?
    Regards
    Neil

  3. #3
    Fellow Frogger!
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    What about filling the external cooler lines on the 306 with the same tranny fluid and terminate with an aftermarket cooler?
    Keep that circuit out of radiator?
    Liqui to liquid cooling?

    85

  4. #4
    1000+ Posts Beano's Avatar
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    Quote Originally Posted by TassieExec View Post
    my concern about using hose clamps on the hoses at the cooler as most seem to do, seems inadequate compared to the banjo fittings on the standard hoses which I've found need to have good washers and be really tight.
    I've fitted two external coolers and just use two clamps on each hose end instead of one. Works fine.

  5. #5
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    A couple of pics. The lines run along the chassis rail - there's just enough room.

    My other 505 (the GTI Executive) had standard hose lines with hose clamps and never had a problem.
    Attached Thumbnails Attached Thumbnails External transmission cooler for 505-pa300167-640x479-.jpg   External transmission cooler for 505-pa300168-640x467-.jpg  
    1998 Peugeot 406 D8SV Manual
    1999 Peugeot 406 D8ST Auto
    2002 Peugeot 406 D9SV Manual
    1994 Peuegot 306 N3 Cabriolet Manual
    1994 Peugeot 306 XR N3 Hatch
    1995 Peugeot 505 GTI executive
    1976 Peugeot 504 Sedan - Now sold

    Over 60 Pugs in my time
    Gerry Mullock

  6. #6
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    Quote Originally Posted by 85Fuego View Post
    What about filling the external cooler lines on the 306 with the same tranny fluid and terminate with an aftermarket cooler?
    Keep that circuit out of radiator?
    Liqui to liquid cooling?

    85
    From what I can make out, the 306 uses a different arrangement and doesn't have transmission fluid recirculation provisions. There certainly doesn't seem to be any hoses in and out like there is with the 504 and 505.
    1998 Peugeot 406 D8SV Manual
    1999 Peugeot 406 D8ST Auto
    2002 Peugeot 406 D9SV Manual
    1994 Peuegot 306 N3 Cabriolet Manual
    1994 Peugeot 306 XR N3 Hatch
    1995 Peugeot 505 GTI executive
    1976 Peugeot 504 Sedan - Now sold

    Over 60 Pugs in my time
    Gerry Mullock

  7. #7
    1000+ Posts bluey504's Avatar
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    I'd replace the hose clamps. The cheap punched out Tridon type fail, the formed/extruded Norma don't. Chinese cheap or made in Australia quality with an implied warranty. www.normagroup.com. The cost difference is not much but having a failure is huge! Brendan.

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