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Thread: Diesel Vectra, Petrol Damage?

  1. #1
    Regular Member si_hoss's Avatar
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    Default Diesel Vectra, Petrol Damage?

    Hi all,

    I've just bought privately a 2.2DTi that stopped working two weeks later, when my mechanic stripped the fuel pump he found PETROL in there, so obviously someone's filled it up (NOT ME I might add) and not had it cleaned out properly

    After the pump, tank and fuel lines being cleaned out properly, and the injector seals being replaced, it's packed up again, turning over fine but not firing.

    First impressions have been I might need a new engine , but can anyone tell me exactly HOW putting petrol in these diesel engines actually damages it? I'm hoping it's just the fuel pump that's gone, but knowing my luck it won't be ...

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    Regular Member Penfold101's Avatar
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    I imagine it's to do with the way they work mate - diesels work on the compression of the air in the cylinder igniting the fuel, whereas petrolos have a lower compression and use a spark to ignite the mixture. With no way of igniting the fuel if you put petrol into a diesel engine, it'll just go through it without burning properly, if at all...

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    Regular Member Readster's Avatar
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    Petrol ruins the fuel pump seals.
    Only if don't start the motor after filling with a diesel with petrol can you getaway with it.
    Have a specialist test the fuel pump for you before anything else.
    If it is damaged then a recon fuel pump will be available,or try a used unit with a guarantee.
    Hope this helps..

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    Vehicle : Fiat

    Trim : Panda 100HP

    Engine : 1.4

    Year : 08

    Default

    Also a diesel pump uses the fuel as a lubricant,petrol doesn't lubricate as well as diesel causing wear.

  5. #5
    Regular Member si_hoss's Avatar
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    Quote Originally Posted by Readster View Post
    Petrol ruins the fuel pump seals.
    Only if don't start the motor after filling with a diesel with petrol can you getaway with it.
    Have a specialist test the fuel pump for you before anything else.
    If it is damaged then a recon fuel pump will be available,or try a used unit with a guarantee.
    Hope this helps..
    Thanks chaps - so if run with petrol in (which this obviously has been) does it just knacker the pump? Why has my mechanic over the phone suggested worse case a whole new engine (he's definately NOT the type to rip people off btw)? Would it damage valve seats or rings for instance? In the two weeks I've had it it only gave a puff of white smoke on start up, but otherwise nothing.

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    Regular Member gromit's Avatar
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    I used to have 8 diesel vans on the go and there was always one idiot every now and again who would fill it with petrol. I can honestly say that none of them suffered and long term damage as a result. I think it happened four times (twice with the same guy) and they all drove them until the spluttered to a stop. I had the tank drained and filled with diesel and they all ran fine after that. The vans that happened to where a VXcombo, Transit Connect and a Peugot.

    I would think the damage would be limited to just the seals in the pump and injectors as the rest is basically the same as a petrol engine. Might be wrong though.

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    Regular Member steve's Avatar
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    I would shop around if you need a new fuel pump as the Dti engines have a rather expensive pump, IIRC its 4 figures. Whereas the newer common rail engines need not have a one so compicated. Just shop around as prices can vary.
    Last edited by steve; 1st May 2009 at 13:23.

  8. #8
    Regular Member si_hoss's Avatar
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    Quote Originally Posted by steve View Post
    I would shop around if you need a new fuel pump as the Dti engines have a rather expensive pump, IIRC its 4 figures. Whereas the newer common rail engines need not have a one so compicated. Just shop around as prices can vary.
    FOUR FIGURES??? All I can think of is FOUR LETTERS right now!!!!

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    There are breakers on line that guarantee parts, if you have the fiat motor that may widen your choice.
    A lot of garages maintain that the motor is 'wrecked' but, I agree with gromit about the pump seals.
    The cheapest way out is a used fuel pump and consider selling the car on if you have any lingering doubts.
    Let us know how you get on

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    Regular Member Readster's Avatar
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    'First Choice' spares have diesel pumps

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