Need help from Olds nerds...tell me what I'm looking at.
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Need help from Olds nerds...tell me what I'm looking at.

  1. #1
    Senior Member Texgo's Avatar
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    Default Need help from Olds nerds...tell me what I'm looking at.

    I have the original Olds engine that went with my jet boat. It is a 1972 455 "F" block (stock as far as I can tell) with a "E" head on one side and a "G" head on the other side. I hear that the E and G are pretty much the same. I was told that it was freshly rebuilt. I pulled the pan off the other day to check it out, and everything looks clean. The rods look new. I don't know much about Oldsmobile engines. I know about the oil flow problems with the heads. I noticed that the windage tray has been carved away around the oil pump. Now I am wondering if that is a high volume pump and the windage tray had to be cut to fit it in, or if this is something sloppy that I need to change out. Also, I noticed that the heads seem to have fairly good oil drain holes, but I have never taken time to look at an Olds head before, so I don't know if they have been machined out or not. There is a approx 9/16" hole cut, with a angle-cut hole that I can fit a pencil in with wiggle room. Is this stock, or improved?
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  3. #2
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    the windage tray in that motor is not stock it looks like a mondello one that has been hacked on. The oil return holes on your heads haven't been touched they are still stock size they need opened up there and under the head on the block. Get ahold of timanatior on here he is a olds guru and helped me through my build

  4. #3
    Senior Member Oldsquirt's Avatar
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    That IS a stock Olds "windage tray"(hard to call it that!). You can tell by the pressed in ribs. Most likely it cracked and instead of replacing it, someone just removed the damaged portion.

    Only way to tell if it is a high volume pump is to check the numbers for identification. High VOLUME is NOT recommended for an Olds unless very substantial mods have been made to the oiling system.

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  6. #4
    Senior Member matt1840's Avatar
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    the return holes may look large but if you flip the motor right side up and put a pencil through the return holes youll see the the holes are damn near on a level plane... Not very good for returns.. Do a search on olds motors and youll find my complete buildup.. Get ahold of timiniator hes the olds guru so to speak, and if you get at me through PM ill send you an article explaining how to builds an olds engine correctly..

  7. #5
    Senior Member Texgo's Avatar
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    I appreciate the help. Here is my 10 qt. oil pan from Ebay. I don't know what brand it is. Is that a built-in windage tray? If so, I can take off the windage tray that is on the engine, right?
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  8. #6
    Senior Member matt1840's Avatar
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    Quote Originally Posted by Texgo View Post
    I appreciate the help. Here is my 10 qt. oil pan from Ebay. I don't know what brand it is. Is that a built-in windage tray? If so, I can take off the windage tray that is on the engine, right?
    yea if you dont remove the one off the engine they may make contact and not mount correctly.. take the one off the motor and call it good..

    Do yourself a favor and measure the distance between pan and oil pickup. Its cheap insurance..

  9. #7
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    did that windage tray only come on boat motors stock? I have 2 455's that came out of cars and a 403 that was stock in my boat and none of the 3 have that windage tray. Do i need to put one in my motor?

  10. #8
    Senior Member Texgo's Avatar
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    All that windage tray does is it keeps the oil in the pan from sloshing onto the rotating crank - creating drag. I am no expert though. There are "scrapers" that sandwich between the oil pan and the crank that have cutouts that just clear the rotating crank. Some people use those.

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