Timing cover Gen 6 BBC with double roller
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Timing cover Gen 6 BBC with double roller

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    21 Daytona Outlaw's Avatar
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    Default Timing cover Gen 6 BBC with double roller

    While painting my block today I tried my stock timing cover on it.
    And guess what it fit.
    Everybody told me I would have to purchase a new cover (IMCO)
    to clear the rollmaster double roller.

    whats up with that????
    #55

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    You're just special.......






    Darrell.
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    With Twins

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    I guess, too bad I already bought the imco... oh well I guess
    I needed some more polished aluminum on my engine.
    #55

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    Quote Originally Posted by Outlaw View Post
    While painting my block today I tried my stock timing cover on it.
    And guess what it fit.
    Everybody told me I would have to purchase a new cover (IMCO)
    to clear the rollmaster double roller.

    whats up with that????
    Just curious,, did you use a MK IV style cam and gears, or Gen 6 style cam and gears. It used to be you couldn't buy a Gen 6 style double roller chain either, but I know that is no longer the case. It would be logical to make a combination that would work with stock covers.

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    Show off! Gotta admit that this Imco is purdy though.........

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    Quote Originally Posted by obnoxious001 View Post
    Just curious,, did you use a MK IV style cam and gears, or Gen 6 style cam and gears. It used to be you couldn't buy a Gen 6 style double roller chain either, but I know that is no longer the case. It would be logical to make a combination that would work with stock covers.
    the cam core is a gen 6 configuration, because I wanted to use the stock style cam retainer.

    Rollmaster is a gen 6 also.
    #55

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    Quote Originally Posted by Outlaw View Post
    the cam core is a gen 6 configuration, because I wanted to use the stock style cam retainer.

    Rollmaster is a gen 6 also.
    Ok,, I understood the cam gear and cam would have to match, it's a smaller bolt circle I think. That's probably why it would clear, without taking the time to double check a Gen 6 against MK IV style crank gear for any difference in offset.

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    After hearing about all the problems with installing a mark 4 cam in a gen 6 block, I figured the gen 6 cam and retainer would be the easiest route. Plus I already
    had a new billet rollmaster set for a gen 6.


    I'm guessing if I would have used a mark 4 cam
    I would have needed the IMCO cover?

    How did you setup John's 502?
    #55

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    Quote Originally Posted by Outlaw View Post

    How did you setup John's 502?
    I had the factory cam reground to suit the blower, used factory retainer plate, and a new GM single roller chain, behind the IMCO cover. I guess he got it fired but is fighting some carb problems.

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    Quote Originally Posted by obnoxious001 View Post
    I had the factory cam reground to suit the blower, used factory retainer plate, and a new GM single roller chain, behind the IMCO cover. I guess he got it fired but is fighting some carb problems.
    Thanks, I like my IMCO cover better anyway.
    #55

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    If using mark IV cam and double roller in a gen VI block you must use the IMCO or Milodons cover. The Imco cover has a large dull edged timing pointer. Does any body know of an after market pointer for the gen VI cover? SJ

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    Quote Originally Posted by obnoxious001 View Post
    I guess he got it fired but is fighting some carb problems.
    That my friend, would be an understatement I might as well just pour fuel down the carbs

    Quote Originally Posted by super junk View Post
    Does any body know of an after market pointer for the gen VI cover? SJ
    Very good question.......anybody???

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    I think I had a couple of threads about this stuff when I went through it. It's a total pain in the ass. The GEN 6 cam bolt circle is a smaller diameter because of the cam retainer.
    Here is a pic of the stock gear set.

    Ignore the red circles, those were just areas I had to remove for the jesel cover.
    I ended up going with the jesel for lots of reasons already mentioned.
    Last edited by widowmaker; 05-17-2009 at 11:54 AM.
    Boat 405.

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