Peugeot 508 1.6 Turbocharged 2013 engine performance issues
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  1. #1
    Tadpole
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    Default Peugeot 508 1.6 Turbocharged 2013 engine performance issues

    Hi all, I'm new to this but wanted to get some serious feedback on what has been an ongoing issue. Firstly I have finally had the timing chain and guides replaced after a lot of whining from the dealer. Upon getting the car back I noticed a lack of power- a diagnostic was done and showed low pressure in the turbo??? They said it maybe the hoses deteriorating so got the car back in and guess what- I need to have some hoses replaced. $900.00 they want. After asking if he was serious I told them not to bother I will put up with the performance issue for now. What hoses would cost that much to replace and can I do this myself?

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  2. #2
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    You can lose power if the induction system leaks. The high pressure part after the turbo is made of rigid plastic, except for the reinforced hoses into and out of the cooler mounted next to the radiator.

    I'd check over the whole system, including jointing, because the rigid duct pieces were removed to do the chain (the top cover was removed to access the chain sprockets and to lock the camshafts). The computer gets an inlet pressure reading from the sensor mounted on the top of this rigid duct near the rear.

    Peugeot 508 1.6 Turbocharged 2013 engine performance issues-screenshot-2.jpg
    The stuff in the pic was removed. Reinforced air hoses usually are long lived.
    Last edited by seasink; 30th December 2016 at 10:10 AM.

  3. #3
    Fellow Frogger!
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    Hi there was the turbo pressure fault there before the timing was done if not check the hose onto the throttle body the seal can get crushed or can become distorted. If it was there before there
    Maybe a vacuum supply problem. How many km's as the vehicle done? Also the dump valve can fail it would be worth removing it and checking the diaphragm it's only 3 Allen key bolts.

  4. #4
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    $900 does sound slightly insane. Strange that the problem only surfaced AFTER they worked on your car. I'd check all joints and clamps. Then, assuming you have an air compressor or air tank available, you could make up a cheap DIY boost leak tester (just google this) and fill the system with compressed air whist spraying WD40 on the joints and pipes. Air leaks will show up as bubbles. I've just done this on my turbo 505 and found a few small leaks at the joins due to loose clamps. Its unlikely that all or even any of the pipes need replacing. Sounds like they are using the scatter gun approach in replacing all pipes rather than doing a boost leak test to find the real problem.

    As well as the dump/blow-off valve leak mentioned above it could also be a leaking vacuum hose, leaking turbo actuator (tested by bypassing it) or a leaking boost gauge (if fitted). If you take it to a specialist turbo shop they should be able to boost leak test it for you for the cost of 1/2 to 1 hours labour.
    Last edited by nisspug2; 2nd January 2017 at 10:56 AM.

  5. #5
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    Thanks for all of your replies, I will check all of the above suggestions and get back to you with the results of my findings. FYI, The car has done 115,000 kms but has had all servicing done using the right oil.

  6. #6
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    Good luck. First you take off half the induction system to do a repair. Then the induction has a loss of pressure. You have to wonder.....

  7. #7
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    Peugeot 508 1.6 Turbocharged 2013 engine performance issues-1.6-thp-engine.jpg On the larger pipe of the right hand side it has broken off the turbo. Does anyone make an after market part for this engine? I am sure that the dealer broke it but will not admit to it. Very brittle for a 3 year old car. I would upgrade the whole air intake system if someone made the parts for it. If you have any suggestions I would love to hear from you. Thanks!

  8. #8
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    It's made from some kind of slightly flexible plastic with hose clips at the ends. Could it be plastic welded? Is it broken through or just split partially? It has to resist turbo suction rather than pressure.

  9. #9
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    Work out what angles you need then look on ebay for "intercooler pipes". Assuming both pipe ends are round and not square or something. You can weld two pipes with different bend angles together to create the needed shape (best) or join them with silicone hose (not as good).

    You can also use two bent silicone hoses using a aluminium pipe to join them (also on ebay) but the silicone hoses are more prone to collapsing from heat and the suction of the turbo which really does happen.

  10. #10
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    What about the sensors that are connected to the original part? The original part is totally crumbled at the turbo end and there is about 5 to 10mm left to join a bit of silicon pipe on which I have done as a patch up method. What do you actually call this part?

  11. #11
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    Its a bit hard to tell from the photo but if the pipe goes from the airbox to the turbo its called the turbo air intake pipe. As far as the sensor goes you can buy a weld-on fitting like the one below (but of the correct thread), drill a hole in the pipe and have the fitting welded on. You would have to make sure the sensor (is it a MAP sensor or a temp sensor?) sits at the same depth in the new pipe as the stock pipe.

    Aeroflow Steel Weld-On Female NPT Fitting 1/8" NPT AF998-02S | eBay

  12. #12
    sans witticism SLC206's Avatar
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    Quote Originally Posted by Bathey View Post
    What do you actually call this part?
    It's a little hard to see from the photo, but I guess it's item 1 in the attached image and that's called the turbo air intake pipe.

    Note: the pic part number may not be the same as your car.

    There may be any number of wreckers/ pick a part with the item you need. You just need to make sure it's the same as yours

    Peugeot 508 1.6 Turbocharged 2013 engine performance issues-turbointakepipe.jpg
    Regards,

    Simon

    2018 308 GTi 2011 DS3 DSport
    ----
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    www.peugeotclub.asn.au

  13. #13
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    Hi there was the turbo pressure fault there before the timing was done if not check the hose onto the throttle body the seal can get crushed or can become distorted. If it was there before there
    Maybe a vacuum supply problem. How many km's as the vehicle done? Also the dump valve can fail it would be worth removing it and checking the diaphragm it's only 3 Allen key bolts.

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