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  1. #1
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Sealing head bolts

    The Stock Matrix head has 8mm bolts that pass thru the water jacket.I've heard they have in the pass used Loctite on the heads to seal this. On mine I ordered Chrome Moly zinc coated washers from Mcmaster-Carr that has a rubber washer molded on them,they are removable and reusable. I think 20 were about $4.00.

    On the PSI heads I have they have studs that needed sealing also,so I used a differant type of washer,these have a rubber triangle molded in the center to seal theads,also available from Mcmaster Carr.
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  2. #2
    Matrix 200 suparoo's Avatar
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    cheers for the tip on these used them on the matrix saving me heaps of time and agro sealing up the bolts with silcon

  3. #3
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    They are the whip,and reusable if you want too.

  4. #4
    Matrix 200 suparoo's Avatar
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    Used these and they were great but the second time I took the head off and reused them they split on futher investigation I found that the underside of the cap head bolts is not square where the head meets the shaft causing the bolt to push the washers out and split them.

    The fix was to put each bolt in the lathe and using a parting tool just run it lightly across the under side of the head and into the shaft a little bit until there is a flat on the bolt. the bolt still measured 7.9mm at the base of the head and is now nice and square giving a better sealing suface and pushing evenly on the washer.

  5. #5
    ph2ocraft's Avatar
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    Hmmmnn, I've never used the washer nor cut the head bolts and see no leaks. I better take a little closer look...

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