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Another King Bearing question

  1. #1
    Senior Member wizbang's Avatar
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    Default Another King Bearing question

    Got a question on King bearings ?

    We did two blown Alky 540 BBC engines about 3 years ago.
    Fired the first one up on the dyno, using Brad Penn 50wt.
    Did a little warm up, ran the valves, check things out, checked the oil filter, things were good !

    After the 3rd real pull, checked the filter again, found "shavings" in the filter. They were soft , aluminum colored.

    Took the engine back to the shop, pulled the pan, looked things over. The rod bearings were coming apart in flakes ?
    Like flaking apart in layers ?

    Called King, they said there shouldn't be any problems , must have been a bad batch ????
    We took everything apart, washed everything up, used Clevite this time this time, did the dyno, and it ran for the 3 years now ?

    You guys got any ideas or had any trouble like this ?

    ( the 2nd engine we just started with the Clevite bearings after the first experience )

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  3. #2
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    Quote Originally Posted by wizbang View Post
    Got a question on King bearings ?

    We did two blown Alky 540 BBC engines about 3 years ago.
    Fired the first one up on the dyno, using Brad Penn 50wt.
    Did a little warm up, ran the valves, check things out, checked the oil filter, things were good !

    After the 3rd real pull, checked the filter again, found "shavings" in the filter. They were soft , aluminum colored.

    Took the engine back to the shop, pulled the pan, looked things over. The rod bearings were coming apart in flakes ?
    Like flaking apart in layers ?

    Called King, they said there shouldn't be any problems , must have been a bad batch ????
    We took everything apart, washed everything up, used Clevite this time this time, did the dyno, and it ran for the 3 years now ?

    You guys got any ideas or had any trouble like this ?

    ( the 2nd engine we just started with the Clevite bearings after the first experience )
    I've always used the Clevite . I just stick with the what has worked.
    Seems all the parts today have QC problems. The price never goes down, just the quality.
    "if we keep doing it the same way we always do..we will always get the same results"
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    gn7
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    Depends on the King bearings used. The HP bi metal aluminum silicon bearings are not up the loads placed on them by a blown alky burning BBC. You can't compare them to Clevite/Speed Pro/Federal Mogul/ACL "H" bearings. King's XP bearings are tri metal "H" type.

    I don't see how you could see aluminum in the filter/oil from a "H" type bearing.



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    Senior Member wizbang's Avatar
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    GN, I don't remember which model they were, but, the engine owner had called King and got the right model. Not really sure what the deal was. I've seen lots of guys talk really good about them ?

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    gn7
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    Quote Originally Posted by wizbang View Post
    GN, I don't remember which model they were, but, the engine owner had called King and got the right model. Not really sure what the deal was. I've seen lots of guys talk really good about them ?
    King lists their bi metal bearing as a racing-performance bearing, as opposed to the OEM line, like Clevite "P" or Federal Mogul AP.

    The King HP bearing is roughly the equivalent of using a Vandervil or Clevite "V" bearing. Not a bad nearing, but not something I would use in a blown alky deal.

    King XP bearing is similar to Clevite "H" tri metal bearing. Much harder, with less embedability, but withstands much higher loads.

    When a bi metal HP bearing fails, you see aluminum in the oil, when a XP fails, you see copper.
    Performance | King Engine Bearings



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    Last edited by gn7; 01-01-2014 at 09:39 AM.

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    Senior Member wizbang's Avatar
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    Thanks GN, it is amazing your vast knowledge and willingness to do research !!!!

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    How about the ALP Race H bearing?

  10. #8
    gn7
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    Quote Originally Posted by terrible_buddhist View Post
    how about the alp race h bearing?
    acl?????



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    ACL, MCL...they are require knee surgery

    my bad...ACL.

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    gn7
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    Quote Originally Posted by terrible_buddhist View Post
    ACL, MCL...they are require knee surgery

    my bad...ACL.
    Its all I use. They have been in short supply lately because the company was in financial straights and was sold off. Hopefully the supply picks up and the QC remains the same.



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    Do you use the H or HX?

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    gn7
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    Quote Originally Posted by terrible_buddhist View Post
    Do you use the H or HX?
    The X is extra clearance. It depends on what the engine needs. Sometimes, it one of each on a given journal. Maybe even just one or two X shells in a given engine.



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    In my quest for being learn-ed...

    How does one adjust clearances on the bearing? It seems to me (obviously incorrectly) that if you want a little more clearance for a marine engine you would want a bearing with more clearance, If the rod is fixed, and the bearing is fixed, how do you adjust the clearance?

  16. #14
    gn7
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    The X bearing is thinner. I adds clearance. Sometimes, it might add just the right amount, sometimes using both X halves adds too much, so you only use 1 X half, and one non X standard bearing for a given journal. Sometimes, you don't need any X bearings. You don't know until you mock everything up and measure.

    Who told you that marine engines need more bearing clearance?



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