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This little tool is needed to replace the seals on SY accumulator control valve bobbin pistons.  Carefully remove the old seals with an X-acto knife, then the tapered tool can slip into place on the the short end of the piston.  The new seals can then slide into place with fingernail pressure - assuming you have strong nails.  In the final pic, the seal has not relaxed to it's final shape, but it will in just a few minutes.

We also have SY ACV rebuilding kits available under the "Parts" tab.

This tool is only for SY cars running RR363.

SY ACV Bobbin Piston Seal Installation Tool

  • All US shipping is $9.20 - no matter the size.

    Please contact us for an accurate international quote.

  • All British Tool Works tools are guaranteed for life.  No receipt necessary.  We will be astonished if one fails and we will ask plenty of questions, but it will be replaced post-haste or a refund given - your choice.  But honestly, that's not gonna happen.

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