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Thread: Rebuild kits 4BD1 v 4BD1T

  1. 21st July 2013, 07:13 PM #11
    Sitec's Avatar
    Sitec
    Sitec is offline YarnMaster Subscriber
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    I'm not up on my 4BD1's, tho Offender90 is teaching me quite a bit but what I will say is yes to intercooling. You get more power and cooler temps so a win win situation.
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  2. 21st July 2013, 07:53 PM #12
    englishsteed Guest

    alfin piston

    The Alfin pistons refered too earlier will have a steel insert in the piston where the top ring groove is. This is designed to strengthen the ringlands and help prevent wear and breakage of the ringlands.
    Not too long ago I rebuilt my 6bd1( aftermarket turbo fitted ) in my bus. When I did I simply put a 6bd1t kit in it. I'm fairly sure that the piston dimensions are the same.
    It is common practice in many engines to fit alfin piston when rebuilding with the intension of turbocharging. 3L and 1HZ Toyota for example.
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  3. 21st July 2013, 08:07 PM #13
    englishsteed Guest

    alfin piston

    The Alfin pistons refered too earlier will have a steel insert in the piston where the top ring groove is. This is designed to strengthen the ringlands and help prevent wear and breakage of the ringlands.
    Not too long ago I rebuilt my 6bd1( aftermarket turbo fitted ) in my bus. When I did I simply put a 6bd1t kit in it. I'm fairly sure that the piston dimensions are the same.
    It is common practice in many engines to fit alfin piston when rebuilding with the intension of turbocharging. 3L and 1HZ Toyota for example.
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  4. 22nd July 2013, 07:42 AM #14
    Bush65
    Bush65 is offline YarnMaster
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    Some years back I remember Isuzurover (Ben) posted a list (a jpg file from memory) with piston details for the 4BD1/T.

    There were a few in the list, and IIRC some differences in skirt length. It did note which ones were alfin.
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