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Thread: Autotech camshaft wear

  1. #1
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    Default Autotech camshaft wear

    Might be a good idea for people using autotech HPFP upgrades to inspect the wear on the camshaft lobes! I recently did a repair that required the HPFP to be removed and I noticed some definate wear on the camshaft lobes, the wear is in the centre of the lobe (all 3) the bucket is fine but looks as though there is a definate relationship with the HPFP pumping element and the contact point on the in side of the bucket transferring to the camshaft.

    This car had 128k, with pump internals being roughly 5k running a fully synthetic penrite oil.

    The possible causes of wear in this case maybe from the previous HPFP being faulty, incorrect installation of the HPFP kit, tune related with HPFP upgrade, the oil used and intervals between changes or may even be a side effect of the worn timing chain...

    Maybe we can use this thread to post details and pics of cam lobes before changing HPFP internals?

    Include following info;

    current pic of lobes
    K's at install
    date of install
    engine oil used
    service intervals
    HPFP internals/ complete unit used
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by MPS2NV; 04-09-2013 at 05:35 PM.
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  2. #2
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    Default

    How long have you had the HPFP installed , rough klms etc.

  3. #3
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    It has been installed for about 2 months about 5000km

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  4. #4

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    that is a lot of wear for just 5000km
    @EdgeAutosport.com how you guys seen/heard of this type of wear before?

  5. #5

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    That's a bit scary. Is there usually wear from the stock hpfp? I.e. can you actually attribute this to 5000km with autotech vs 8 years of wear with the stock hpfp?


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  6. #6

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    Quote Originally Posted by auscer View Post
    It has been installed for about 2 months about 5000km

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    Who installed it and was the whole pump stripped down and cleaned?

  7. #7

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    Quote Originally Posted by Lachlan View Post
    That's a bit scary. Is there usually wear from the stock hpfp? I.e. can you actually attribute this to 5000km with autotech vs 8 years of wear with the stock hpfp?


    Sent from my evil apple using TapaCrash
    good point. also can you physically feel the wear or is it just surface 'tarnish'?

  8. #8
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    Quote Originally Posted by ttshark View Post
    Who installed it and was the whole pump stripped down and cleaned?
    I installed it with a step by step instructions that come with the internals and the one on you tube that everyone recommends to go off... the pump not fully De assembled but cleaned throughly... I help @KFuNk do his aswell so this wansnt the first time fp internals install..

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  9. #9
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    Quote Originally Posted by Lachlan View Post
    That's a bit scary. Is there usually wear from the stock hpfp? I.e. can you actually attribute this to 5000km with autotech vs 8 years of wear with the stock hpfp?


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    Only way to tell is someone who has stock fp internals and have a look... maybe @MPS2NV when he does the stock ms6 can see if the wear is the same

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  10. #10
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    That doesn't look too good.......

  11. #11

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    Aren't the cams loabs meant to be hardened?

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  12. #12

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    How much do you have to remove to check that part of the cam?

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  13. #13
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    I just updated the 1st post

  14. #14
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    May not be from the HPFP internal upgrade but def something to pay attention too!

    Quote Originally Posted by Lachlan View Post
    That's a bit scary. Is there usually wear from the stock hpfp? I.e. can you actually attribute this to 5000km with autotech vs 8 years of wear with the stock hpfp?


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  15. #15
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    The camshaft lobes aren't pitted out or chipped but the wear is certainly enough to discolour the lobes and appears to worn past the hardend surface.

    Quote Originally Posted by lup15 View Post
    good point. also can you physically feel the wear or is it just surface 'tarnish'?
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  16. #16
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    I have Cp-e HPFP, over the last 10k there has been no noticable wear at the times I have checked.

    Usually the housing doesnt need to be removed for a HPFP upgrade, so for anyone to inspect lobes they will need to remove the bucket and get right over the engine to have a visual check of current lobe condition.

    Quote Originally Posted by auscer View Post
    Only way to tell is someone who has stock fp internals and have a look... maybe @MPS2NV when he does the stock ms6 can see if the wear is the same

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  17. #17
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    They are, the lobes are treated during manufacture, this doesn't mean they wont wear, just increases its resistance to wear.

    Quote Originally Posted by spooon View Post
    Aren't the cams loabs meant to be hardened?

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  18. Default

    Quote Originally Posted by lup15 View Post
    that is a lot of wear for just 5000km
    @EdgeAutosport.com how you guys seen/heard of this type of wear before?
    I've never seen that much wear before. And since the Autotech internals reuse the factory spring, I wouldn't think there would be too much increased pressure on the cam lobe. We have Autotechs in our shop car for 15,000 miles, and I had a CPe fuel pump on my car for 70,000 miles and never saw any wear to be concerned about.

  19. #19

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    Quote Originally Posted by EdgeAutosport.com View Post
    I've never seen that much wear before. And since the Autotech internals reuse the factory spring, I wouldn't think there would be too much increased pressure on the cam lobe. We have Autotechs in our shop car for 15,000 miles, and I had a CPe fuel pump on my car for 70,000 miles and never saw any wear to be concerned about.
    This is exactly what I was thinking.. :/
    The only other thing that could contribute to wear would be that the autotech shaft is harder than the cam lobe? Either that or the shaft was not lubricated properly so it has a higher resistance when sliding through the piston, meaning greater force on that cam.

    I think it best to check out some other peoples cam shafts to verify if this might be a one off or something to be concerned about.
    @EdgeAutosport.com, when you say you've never seen any wear, how often have you looked at the shaft lobe for signs of wear though? I don't imagine it'd be something that you'd check very often :/
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  20. #20
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    Its definitely something that Autotech are aware of. I recently installed one in my car and noticed a disclaimer sheet that came with it, explaining that they are not responsible for such cam lobe wear.

    If I recall correctly, the explanation mentioned that because the piston was pushing increased fuel pressures more regularly there would be more pressures put on the lobe to force the piston forward.

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