Corrosion on something....but what is it!?


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Thread: Corrosion on something....but what is it!?

  1. #1
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    Corrosion on something....but what is it!?

    Hi Guys,

    I have just picked up a car and it has some corrosion on a small plate in the engine bay.
    It looks like it should be pretty easy to replace / cheap. But does anybody know what it is and if this is happens sometimes?
    Everything else in there is looking fantastic, literally just this small plate thing.
    Any thoughts would be awesome


    Pic here

    Corrosion on something....but what is it!?-r8-corosion.jpg

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    Senior Member DaveL's Avatar
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    Re: Corrosion on something....but what is it!?

    It's the HP mechanical fuel pump, I think you would have to replace the complete unit, this is what it should look like -

    Corrosion on something....but what is it!?-hp-mechanical-fuel-pump.jpg
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    Re: Corrosion on something....but what is it!?

    Ah amazing, thank you!!

    I'm just messaging Audi about it now..

    For things like this would you say it's necessary to go to them for it, or would something like a Hitachi one be fine from elsewhere?

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    Re: Corrosion on something....but what is it!?

    Quote Originally Posted by Wanderingmind83 View Post
    Ah amazing, thank you!!

    I'm just messaging Audi about it now..

    For things like this would you say it's necessary to go to them for it, or would something like a Hitachi one be fine from elsewhere?
    Provided you get the right model Hitachi anywhere will be fine, I had an offer on 2 for the price of one from a friend in Audi, so bought from Audi.
    Black/Gold 09 V8 Coupe R-Tronic. Black/Gold 05 Race prep'd Yamaha R1.

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    Re: Corrosion on something....but what is it!?

    Quote Originally Posted by DaveL View Post
    Provided you get the right model Hitachi anywhere will be fine, I had an offer on 2 for the price of one from a friend in Audi, so bought from Audi.
    Forgot to mention, if you decide to change the whole unit, I would change the drive for the pump, it's a mechanical cam follower sold separate.
    Black/Gold 09 V8 Coupe R-Tronic. Black/Gold 05 Race prep'd Yamaha R1.

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    Re: Corrosion on something....but what is it!?

    Quote Originally Posted by DaveL View Post
    Forgot to mention, if you decide to change the whole unit, I would change the drive for the pump, it's a mechanical cam follower sold separate.
    This is great help - I would do this. Also is there kind of Audi site like RealOEM has for BMW cars that helps find part numbers etc? Would make life really easy when talking to audi service.

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    Senior Member DaveL's Avatar
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    Re: Corrosion on something....but what is it!?

    Black/Gold 09 V8 Coupe R-Tronic. Black/Gold 05 Race prep'd Yamaha R1.

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    Re: Corrosion on something....but what is it!?

    Quote Originally Posted by DaveL View Post
    Ah thanks a lot that's exactly what I was looking for..

    Just one last favour / advice, can you link a part number to the drive for the pump / cam follower you mentioned?

    I just heard back from Audi, apparently there are two of he HP pumps in there, one on the drivers side one on the passenger.. didn't know this! Do you think both should then be changed at the same time (and presumably two sets of drives for the pumps) ?

    Cheers Dave!

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    Senior Member DaveL's Avatar
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    Re: Corrosion on something....but what is it!?

    https://audi.7zap.com/en/rdw/audi+r8.../1/133-133020/

    079 127 026 H fuel pump right
    079 127 025 H fuel pump left

    Number 8 on the drawing 03H 127 307 A tappets ( this is the cam follower, same for both sides)

    It's up to you if you want to change both, they're not cheap kkkkkkk.
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    I would try some light scotch brite first if it's just cosmetic. My be able to knock that off and clean it up.
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