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proxlamus©

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    P90A head ticking what to do?

    in Turbo / Supercharger

    Posted

    You know I got that far too... I was afraid of removing the top portion off with those dimples and it scared the hell out of me.. Ted (thumper) says just pop them off, but being my daily driver I was a bit nervous on that.

     

     

    I soaked it in brake fluid cleaner.. without removing the cap.. didnt do anything..

     

    Lets see what others say about this one

    P90A head ticking what to do?

    in Turbo / Supercharger

    Posted

    http://www.zcar.com/forums/read.php?f=1&i=614314&t=614229

     

    Just wanted to report the result of my efforts to find a cheap alternative to convert P90A hydraulic lifter head to solid lifters. It can be easily accomplished for about $35 bucks.

     

    Because the hydraulic lifter bosses are already WAY countersunk, you only need to buy 12 20mm Timesert thread inserts for $2.71 each (+shipping) rather than the expensive tool kit (which includes a thread tap, insert countersink tool, and thread locking tool you won't use).

     

    When you get the threaded inserts from Timesert:

    1. Remove the hydraulic lifters

    2. Thread the Timesert inserts into the lifter bosses until they bottom out

    3. Install solid lifters.

     

    Done!

     

    The solid lifters are a LOT shorter than the hydraulic lifters. The hydraulic lifter bosses are pre-countersunk in a way, as the threads are only at the bottom of the lifter boss. So the threaded insert when installed is below the top-deck of the head. The solid lifters aren't as long as the hydraulic lifters, so they only engage the thread inserts in the first 5-6 threads. But seeing as the lifters see only compression forces, not tension forces, 5-6 threads are plenty to hold the lifters into the head.

     

    I took lots of pics and will post a short, well illustrated "how-to" article on the net when I find the time. So all those P90A heads out there should now be considered viable and cost-effective alternatives to P79s.

     

    Cheers,

    Alex

     

    They're 1.5mm thread, as are the solid lifters. Hydro are 20 x 1.5 x 28 (total lifter length). Solid 18 x 1.5 x ~19mm.

     

    http://www.timesert.com

     

    The Timesert item number is 18153 (M18x1.5x18.3 INSERT)

     

    Time Fastener Co

    5301 Longley Lane

    Reno, NV 89511

    (775) 829-1026

     

     

    Thanks Alex from Zcar.com for that..

     

    Ryan

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