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    GPU heatsink screws on p170sm

    Discussion in 'Sager and Clevo' started by luckyluca, Sep 22, 2020.

  1. luckyluca

    luckyluca Notebook Enthusiast

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    I need to purchase new screws as I managed to strip the head of two out of the four gpu screws holding the copper of the gpu heatsink in place over the gpu.

    Can you kindly please tell me the exact model/dimensions of these screws are so I can get a few more?

    This is a p170sm. I'm based in the UK.

    Many many thanks
    Luca
     
    Last edited: Sep 22, 2020
    luckyluca, Sep 22, 2020
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  2. Meaker@Sager

    Meaker@Sager Company Representative

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    M1.6*3.5L as listed in the service manual.
     
    Meaker@Sager, Sep 22, 2020
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    t456 likes this.
  3. luckyluca

    luckyluca Notebook Enthusiast

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    Thanks, I found the full description:
    Screw M1.6*3.5L K(T=1.2 D=4.5) BZ ICT NY" Part No. 6-35-82116-3R5

    now if only it was simple to source them online.....
     
    luckyluca, Sep 22, 2020
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  4. t456

    t456 1977-09-05, 12:56:00 UTC

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    Surely, that is not so difficult? You can find scores on ebay:
    10/50 M1.4 M1.6 M2 M2.5 M3 M4 M5 M6 Hex Hexagon Socket Cap Allen Head Screw Bolt
    The 4mm is bit longer than you need, but should still fit when screwed in and if not then a small spacer or a bit of filing will fix that. Make sure to choose 12.9 steel rather than stainless; it is much stronger and inside the laptop there's no need for weatherproofing. These also have hex sockets, which means a lot less risk of stripping the heads next time.
     
    t456, Sep 23, 2020
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  5. luckyluca

    luckyluca Notebook Enthusiast

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    That sounds great, but how can you be sure that threading would be the same?
    Also I was thinking perhaps 3mm would be more suitable because the top screws that I damaged didn't keep the copper tightened enough and perhaps having half-millimeter more tension would help more, what do you reckon?
     
    luckyluca, Sep 23, 2020
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  6. t456

    t456 1977-09-05, 12:56:00 UTC

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    Threading is pretty much universal these days (ISO standards, hence the 'M' in both manual and listing). It is only an issue for very old devices, tools and vehicles or with specialist applications.

    And that could help, but only if they can't screw in far enough with their current length. That's probably not the case since they can thread all the way through. Something you could try is bending back the four little metal flaps a bit backwards. That way there'll be a bit more downward pressure on the heatsink. Having the 4mm screw should actually help there as well since you have more threading to distribute the pull force.
     
    t456, Sep 23, 2020
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  7. Meaker@Sager

    Meaker@Sager Company Representative

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    Also some sand paper could fix the length :p
     
    Meaker@Sager, Sep 23, 2020
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