306, heater matrix and stop leak
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Thread: 306, heater matrix and stop leak

  1. #1
    Fellow Frogger! blahblah's Avatar
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    Default 306, heater matrix and stop leak

    I've suspected the heater matrix on my 306 since I bought the car - forever topping up the coolant. Also staining near the clutch pedal and faint coolant odour from the air vents from time to time. Being psychologically unprepared for pulling out the dash to change the matrix, I found some Rislone stop leak at Supacheap auto:
    306, heater matrix and stop leak-img_2561.jpg

    It's not the cheapest stuff but after 3 weeks of use I haven't had to top up the coolant and the cooling system actually pressurises :-)

    Advertisement


    I'll update if this changes but I'm quite impressed - just add to the coolant, leave it in and top up with coolant.




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    Quote Originally Posted by blahblah View Post
    It's not the cheapest stuff but after 3 weeks of use I haven't had to top up the coolant and the cooling system actually pressurises :-)
    How much was it?

    If it was the heater matrix, would you have been able to use the stuff or would you have had to have pulled out the dash and replaced the matrix?
    Current cars: Peugeot 307 HDi Touring; Peugeot 306 Cabriolet; Peugeot 406 HDi, Peugeot 505 Familiale
    Previous cars: 1965 Peugeot 404; 1972 Renault 16TS; 1970 Peugeo 504 1800; 1978 Peugeot 504 GL; 1976 Peugeot 504 LTI; 1984 Peugeot 505 Familiale; 1982 Peugeot 604 (converted to TD) 1999 Peugeot 306 Cabriolet

  3. #3
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    I think it was $20-30 and replacing the matrix is a dash out job. Hence putting it off as long as possible!


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    I put Bar's Leaks into a Pug years ago that had nothing wrong with it at the time as a preventative. It went on to a long life without problems. A similar Valeo heater coil was used in 90s Rangerovers and people did the same to them.

  5. #5
    Fellow Frogger! 505604's Avatar
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    Quote Originally Posted by blahblah View Post
    … replacing the matrix is a dash out job.
    I know. I just experienced that.

    Quote Originally Posted by seasink View Post
    I put Bar's Leaks into a Pug years ago that had nothing wrong with it at the time as a preventative. It went on to a long life without problems. A similar Valeo heater coil was used in 90s Rangerovers and people did the same to them.
    Interesting and cheap insurance.

    Our 306 Cabriolet didn't have the Valeo matrix, though. I can't remember the brand name - started with B. It must be that they all fail.
    Current cars: Peugeot 307 HDi Touring; Peugeot 306 Cabriolet; Peugeot 406 HDi, Peugeot 505 Familiale
    Previous cars: 1965 Peugeot 404; 1972 Renault 16TS; 1970 Peugeo 504 1800; 1978 Peugeot 504 GL; 1976 Peugeot 504 LTI; 1984 Peugeot 505 Familiale; 1982 Peugeot 604 (converted to TD) 1999 Peugeot 306 Cabriolet

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    Righto, after putting off replacing the heater matrix in the 306 XSI for as long as possible, Iíve decided to start tomorrow. Itís unlikely I can do it all tomorrow so Iíll continue on the weekend. Iíve run through the Haynes manual and the one bit of info missing is how to remove the passenger front airbag (where the glovebox is on older models).

    Does anyone know if it needs to be removed (Iím thinking yes) and if so how to go about it (other than carefully)?

    Cheers, Chris




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  7. #7
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    No it doesn't, just done this ask away! Dash out and you can do it, be super careful with the heater pipes in the engine bay, the plastic becomes brittle, do not put strain on them, they will break, mine did. Silicon grease is required for them to reinstall, makes it much easier.

    Start with this
    Heater matrix with pictures - FAQ Forum - Peugeot 306 GTi-6 & Rallye Owners Club
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    Too many posts! JohnW's Avatar
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    Chris,

    I will be thinking of you. My psychological state certainly prevented me from tackling the job and I paid! Once was just weeks outside warranty when we were in Adelaide on holiday. PSA's miserly approach paid labour but not parts or the other way around and they wouldn't let me have the faulty part for my own inspection.

    The good news? Despite the key attachment point that Allpike's broke, bodged and didn't tell me about on the first job, subsequently discovered by Taylors Peugeot in Adelaide on the second job, the dash never rattled.

    Our 306 had the dash out three times in 21 years, twice in the first 5 for the heater matrix and then at about 18 for the AC evaporator (replaced the 13-year old heater matrix at the time as a cheap precaution.

    Very best of luck..
    JohnW

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    Fellow Frogger! 505604's Avatar
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    I paid to have the matrix on my cabriolet replaced. If I had this step by step procedure available to me, I almost certainly would have done the job myself. Thatís excellent!

    Current cars: Peugeot 307 HDi Touring; Peugeot 306 Cabriolet; Peugeot 406 HDi, Peugeot 505 Familiale
    Previous cars: 1965 Peugeot 404; 1972 Renault 16TS; 1970 Peugeo 504 1800; 1978 Peugeot 504 GL; 1976 Peugeot 504 LTI; 1984 Peugeot 505 Familiale; 1982 Peugeot 604 (converted to TD) 1999 Peugeot 306 Cabriolet

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    Thanks Matthew, the link youíve attached certainly saves some work!

    Hi John, appreciate the thoughts - hopefully you wonít hear any screams!!

    Happy new year!

    Cheers,

    Chris





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    1000+ Posts PeterT's Avatar
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    I think it's also wise to drop the steering column, allowing the dash to come forward more easily.

    '92 205 Mi16
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    Agree remove both indicator and light stalks and drop the column on its bolts, remove air con duct section to get right rear bolt. Call me for any other assistance, the guide os quite good and it helped.

  13. #13
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    Thanks Peter and Matthew,

    Iíve made reasonable progress - will drop the steering column as suggested as the right side is not free. The guide is pretty good!

    The heater hose fittings into the matrix are cracked so will have to source new. I had a leak which I thought was the seals but the plastics cracked.

    Iíll phone Peugeot but I suspect the cost will be silly plus a long wait. eBay has listings for all other models but not the xu10j4r (hose is 6464qf). May need to adapt one of the hoses available to fit. Worst case is the dash goes back in with the new matrix fitted but bypassed until I get the hoses.

    Itís been pretty straightforward so far!

    Cheers,

    Chris

  14. #14
    Too many posts! JohnW's Avatar
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    For the cracked plastics, you might talk to David Cavanagh at French Connection.... Or a UK/Europe supplier.

    Good to hear you are still sane after hours on that particular job. The CX got a full coolant change yesterday - skin removed of course but trivial compared with your task!
    JohnW

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    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

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  15. #15
    Fellow Frogger! blahblah's Avatar
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    Thanks John, I tried a Latvian parts provider (as one does) - very helpful but no joy. Will try the UK too.

    Will give French Connections a go. So use to purchasing online I forget about the eastern states suppliers!

    Yes, grazed knuckles/forearms are par for the course ( I had a flashback to replacing the inner steering rack joints on my first CX).

    The 306 isnít too bad - I believe to remove the dash in a CX you start by removing the rear wheels...




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  16. #16
    Too many posts! JohnW's Avatar
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    If I am correct, you do start with the back axle in a Bugatti to replace an exhaust valve. Starting with the grill and then the RH headlamp to replace a CX battery seems to excite the battery people, not that I'd let them do that themselves!

    Hope the rest goes smoothly. My main concern would be a delay before doing the Haynes classic "replacement is the reversal of removal" step, which would allow your memory to lose one or two key bits of information!
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

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    To make life easier and a tad more complicated in other ways undo the bulkhead connector, take off small round cover use T30 torx and undo bolt; undo the small m10 nuts and internal connector is now free internally and if all else is undone, dash will come out.

    Carefully examine the connection for pins pushed innwyc, spray with crc /wd40 and when ready carefully reinstate it and all electrical things should work.

  18. #18
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    The posts on the dash can be fixed diy. Use a good superglue and rebuild, I fibreglassed one but had to use burr to bring it down to size and smooth enough to go into hole. There should also be a padding washer of material on each post as well where there is bare bulkhead metal.

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    I replaced the coolant hoses in my 306 with a samco kit of silicon hoses (delivered from the UK). Postage took a few weeks, but total cost was less than what PSA wanted for just the radiator top hose!

    https://www.merlinmotorsport.co.uk/p...ant-5-tcs-30-c

  20. #20
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    Careful with the scuttle panel if you need to shift it; mine had silicon on it and I cracked the edge of the windscreen.

  21. #21
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    The heater hose is no longer available from Peugeot. The two hoses are 20mm internal diameter so Iím looking to get one of these:

    https://rover.ebay.com/rover/0/0/0?m...2F112842230350

    and replace/splice the hose to suit the xu10j4r - any reason the plastic fitting to the heater matrix wouldnít fit?

    Or Iíll replace the heater matrix with a 12v ceramic heater element and do away with the whole problem...

    Cheers,

    Chris




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    1000+ Posts Beano's Avatar
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    I bought one of those 12v ceramic heaters for my Magna when a heater pipe snapped off the matrix, but it didn't put out much heat. And when it arrived, I realised that the photo on Ebay had been a bit of an optical illusion....the thing was much smaller than I had expected.

  23. #23
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    I was thinking this ceramic heater might melt the housing... 12v 200w (16-17 amps) should generate a bit of heat!

    https://rover.ebay.com/rover/0/0/0?m...2F312251880216



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    I think I will fabricate a set of pipes in stainless and be done with this and mate them to the exisiting hoses. Standby, I plan to glue my broken ones properly and try that first.
    87 S1 205 GTI / GTI6 powered a project underway
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  25. #25
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    Hi Matthew,

    Iíve ordered a hose (6464fz) with 20mm hoses with the aim of mating it up. Not convinced I can repair what Iíve got as the pipes arenít budging from the heater matrix. Iíll need to cut the pipes off the matrix to minimise damage to the hose.

    I might go to a radiator place and see if I can get a heater matrix with aluminium/copper pipes in the right alignment to allow hoses to be clamped to it.


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