405 SRDT issue
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Thread: 405 SRDT issue

  1. #1
    Tadpole Pindimar's Avatar
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    Default 405 SRDT issue

    Hello All

    Now here's one for the more astute among us (I'm not!)

    Ever since I've had my 405 SRDT (1996 model) which is about two years now, it's had a problem with not starting if parked overnight, uphill. Eventually this problem got worse to the point where even if parked level there could be a problem starting, but that hasn't persisted.

    But you'd think the obvious culprit would be the bulb primer on the fuel line, so I had that replaced, with no improvement. Now the Peugeot mechanic who works on this car is perplexed by this problem, doesn't know what it could be, and suggests a diesel expert as the best way forward. But, he warns, they may go off in all directions which could coat the earth, so be careful, he said.

    So, I thought, before going to the diesel expert recommended, I should run it by this forum, in case someone here has experienced this same problem.

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    So, would there be any ideas out there as to what this problem could be??

    Any help would be appreciated, to say the very least!

    Thanks in advance anybody and all.

    GregF

  2. #2
    1000+ Posts Capago's Avatar
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    how do you get it to start? do you have to reprime it? only other thing i can think of is the fuel pickup, but surely you'd have no issue if it was a full tank, right?
    The wrong oil is better than no oil at all.

  3. #3
    Budding Architect ???? pugrambo's Avatar
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    i'd nearly lay bets on sus O ring at the base of the fuel filter
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  4. #4
    Demannu-facturing! Demannu's Avatar
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    Quote Originally Posted by pugrambo View Post
    i'd nearly lay bets on sus O ring at the base of the fuel filter
    Yup, or a hairline split in the primer bulb.
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  5. #5
    Fellow Frogger! paulrb's Avatar
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    yeah, the seal at the base of the fuel pump or a leak in the water trap.

    So each morning your fuel filter reservoir slowly empties. Takes some work to refill it... hence a difficult start.

    I had this exact problem on my 406 ST TD

    As for it happening due to a slope, time for some lateral thinking:


    • This might simply be to do with the fuel line itself siphoning off fuel into the fuel pump....only happens on a certain angle?
    • On the angle some fuel is left in the fuel pump res as the water trap is on the rear of the unit (is on my 406)?
    • Little pixies get in and drink the fuel but when you park on a flat surface, they can't be bothered flying that far to steal it?
    • There is a dirty great air bubble (or one that keeps getting added to when you stop due to an air leak) in your fuel filter reservoir and at certain angles it enters the hose to the injectors? But at other angles it remains in the reservoir?
    • Your neighbors don't like you and when you park outside their house, they wee in your fuel tank!!


    My money is on the second last one.... Although I am writing this a nearly 2am.... so the pixies are looking more and more possible to me..
    Actually I think if you check your fuel filter when you are ready to start up, if you find there is no fuel, or heaps of air, that is where your leak is...
    Last edited by paulrb; 14th January 2012 at 01:40 AM. Reason: It is late... and I can't spell for shyt..
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  6. #6
    Fellow Frogger! Monsieur 405's Avatar
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    The seals in the fuel line will all perish and die on you. It is definite. SO, obvious culprits are any seals allll the way from the tank to the injectors. It has something to do with the ULSD that is now standard. My mechanic changed all mine to Vitron, which apparently is the shiz.

    Monsieur 405

  7. #7
    Member Luke G's Avatar
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    I would start with the O-ring at the bottom of the fuel filter housing as well. I had this exact problem with mine and thats what the problem was. Its an easy fix as well, remove the filter, undo the bolt at the bottom of the housing, lift it out and turn it upside down and you will see the o-ring sitting underneath.

  8. #8
    Tadpole Pindimar's Avatar
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    Default likely culprits

    Jee thanks all, i wasn't expecting such a rapid response so didn't look in till just now, it seems that this is a problem that's fairly common then, so thanks very much one and all.

    The primer bulb was the first thing to be replaced but that didn't fix it.

    I'll print off your suggestions and give it a go and report back on the results. As I say, the guys who work on the car are Peugeot specialists and they do know their stuff so that's why I thought if someone else has had the same problem it would be a better to check.

    So thanks again all


    GregF
    Last edited by Pindimar; 15th January 2012 at 04:25 PM.

  9. #9
    Tadpole
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    Default 405 SRDT issue

    Hi for what it's worth. There is a little valve(I think it is a non-return valve) in the bottom of the filter housing. recognize it by a piece of white plastic sticking out at the bottom of the black plastic. Item A in the diagram. It's held in place by a star washer. If you carefully remove the washer and even more carefully remove the valve and two small O rings(different sizes) you can inspect the valve which consists of a white plastic housing some brass parts. Close inspection of the white plastic usually reveals cracks which cause the brass part to malfunction.
    Peugeot will not sell you this valve. You have to buy the whole housing which cost me $160 from French Car Care.
    I've had 3 SRDTs now and each one has had the same fault. I have tried different methods of fixing the valve but only the replacement housing (new valve) worked. Sorry about the URL but this website wouldn't let me post the diagram.

    http://www.ebay.com/itm/PEUGEOT-205-...ht_3097wt_1041





    Unfortunately the new low sulphur diesel has caused a new fault with sometimes similar symptoms.
    The seals within the injection pump itself rely on the sulphur in the fuel for lubrication of close tolerance parts. Now the pumps have started to leak and require a $2000 overhaul. Some biodiesel users have found that the extra lubricity in vegetable oil can delay or even eliminate the fuel pump problem if it hasn't gone too far. DON'T TRY THIS IN MODELS LATER THAN 405

  10. #10
    Fellow Frogger! Roland's Avatar
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    Quote Originally Posted by Mike CDV View Post
    Hi for what it's worth. There is a little valve(I think it is a non-return valve) in the bottom of the filter housing. recognize it by a piece of white plastic sticking out at the bottom of the black plastic. Item A in the diagram. It's held in place by a star washer. If you carefully remove the washer and even more carefully remove the valve and two small O rings(different sizes) you can inspect the valve which consists of a white plastic housing some brass parts. Close inspection of the white plastic usually reveals cracks which cause the brass part to malfunction.
    Peugeot will not sell you this valve. You have to buy the whole housing which cost me $160 from French Car Care.
    I've had 3 SRDTs now and each one has had the same fault. I have tried different methods of fixing the valve but only the replacement housing (new valve) worked. Sorry about the URL but this website wouldn't let me post the diagram.

    http://www.ebay.com/itm/PEUGEOT-205-...ht_3097wt_1041





    Unfortunately the new low sulphur diesel has caused a new fault with sometimes similar symptoms.
    The seals within the injection pump itself rely on the sulphur in the fuel for lubrication of close tolerance parts. Now the pumps have started to leak and require a $2000 overhaul. Some biodiesel users have found that the extra lubricity in vegetable oil can delay or even eliminate the fuel pump problem if it hasn't gone too far. DON'T TRY THIS IN MODELS LATER THAN 405


    Just had all the same problems listed in the first post with my nephew's car.
    The solution ended up being a rebuild of the pump - $975.

    I also had a good look at the "valve" you mentioned. I rekon it's a therostat which directs cold fuel round the spiral flutes on the top of the water thermostat housing. When you take the fuel filter housing (plastic housing) off you can see the spirals I am talking about.

    Prior to overhauling the pump - I replaced the "O" ring at the base of the filter housing which didn't alter the need to reprime the pump in the morning.



  11. #11
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    No doubt the fuel is draining out while it site, we know that. Mine does the same. You could spend the money and replace seals and all that or you could go with a cheaper option of putting a one way valve in the fuel line between the fuel filter and injector pump. That way you will always have fuel in it to start it, even if its leaking down the line back into the fuel tank due to a bad seal. Probably a $10 fix. Good luck

  12. #12
    Member Hillbilly's Avatar
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    Quote Originally Posted by Roland View Post

    I also had a good look at the "valve" you mentioned. I rekon it's a therostat which directs cold fuel round the spiral flutes on the top of the water thermostat housing. When you take the fuel filter housing (plastic housing) off you can see the spirals I am talking about.

    Its a bit OT, but...

    Yes, this valve is just a thermostat to divert fuel to warm it up before it goes through the filter and injector pump on cold days.

    I have modified this valve by using a 5c piece so that fuel is always going the 'long' way and being warmed up as i run biodiesel.

    Have had no problems, and the car goes better in winter when its cold.

    Ryan.
    Ryan


    '94 Peugeot 405 SRDT

  13. #13
    Tadpole
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    Hi
    I have 2 srdts and have had a similar problem on both .. one was the mentioned earlier vernotherm in the filter being assmbled with wrong seals causing the spindle to become bent and causing a leak .. solution an aftermarket fuel filter kit approx$90 and only$12 per replacement filter , the second problem was the original fuel line to the fuel injector pump from the filter was leaking not enough to cause a big fuel spillage or noticable smell , but just enough that it would be extremely hard to start .. this developed into it being unable to accelerate under load , car was fine whilst static could rev no probs , but try and drive it would die.
    so i would check your fuel lines and your filter housing
    hope this helps
    simon

  14. #14
    Tadpole
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    I had a similar problem, bought a primer bulb from the marine/fishing store.
    The original has a one way valve which was faulty causing the fuel to siphon back to the tank
    Cheers Ross

  15. #15
    Fellow Frogger! 750frog's Avatar
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    I had this problem in my 406srdt... It was the little return lines that feed back into the pump, they had gone hard and split creating an air leak and the fuel would always run back into the tank. If you drove and parked it for a while it would be ok, but wait overnight and the problem would come back. I put all new return lines onto the injectors and the problem went away. Cost me $20 in fuel line from a diesel place.

    I bought a fuel primer from ebay for $8 cause I thought it was the problem, I have it here if you want it?

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