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  • I Officially Started My Project This Morning
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  1. #91
    Administrator Mac's Avatar
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    Quote Originally Posted by LLC5 View Post
    So what exactly did you name these piston rings?
    In no particular order, there is:

    Dasher
    Dancer
    Prancer
    Vixen
    Comet
    Cupid
    Donner
    Blitzen

    And when they all pull together, the motor really flies....

    Mac
    Common sense is like deodorant. The folks who need it most never seem to use it and there's no polite way to tell them.


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  2. #92
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    Default One Thing Bothered Me

    When I was enlarging my intake seats I ran into two casting flaws. I filled them with gasoline to see if they leaked and the gasoline stayed there; indicating the holes had a bottom. I ended up sandblasting the holes and filling them with epoxy while I was heating the area with a hair dryer. I have two hours running time on my engine with no problems so they must have been bubbles in the casting. My #8 cylinder also has a bunch of "bubbles" as you can see in the 2nd picture. This block has been bored .030" oversize and has many miles on it and the defects haven't been any problem.
    Attached Thumbnails Attached Thumbnails 1971-corvette-engine-rebuild-october-2016-031-jpg   1971-corvette-engine-rebuild-october-2016-033-jpg  

  3. #93
    Administrator Tom Bryant's Avatar
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    1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
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    I suspect those flaws in the cylinder walls are allowing oil to get past the rings. Id never put new rings on that cylinder wall. If it couldn't be cleaned up with an over bore it needs sleeved. I fear that you have not fixed your oil consumption and it wasn't the rings after all.

    Tom
    NCRS 1360.............SACC 2082.............C1 Registry..............L81 Registry
    1959 Chevrolet Corvette 1981 Chevrolet Corvette , 350 L81 automatic Frost Beige

  4. #94
    Member LLC5's Avatar
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    Quote Originally Posted by toobroketoretire View Post
    When I was enlarging my intake seats I ran into two casting flaws. I filled them with gasoline to see if they leaked and the gasoline stayed there; indicating the holes had a bottom. I ended up sandblasting the holes and filling them with epoxy while I was heating the area with a hair dryer. I have two hours running time on my engine with no problems so they must have been bubbles in the casting. My #8 cylinder also has a bunch of "bubbles" as you can see in the 2nd picture. This block has been bored .030" oversize and has many miles on it and the defects haven't been any problem.

    Only one thing bothered you in those photos?

    I see at least three.

    Those hot hot spots on the cylinder wall will not let your rings seat properly, and the holes in the cylinder head are just plain ridiculous.

    As I stated earlier, you need another engine builder.
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  5. #95
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    Default Now What Can I Do?

    Now that I have finished my Oakie rebuild (didn't bore it) I need something new to do. I'll drive it easy for about 1000 miles and then see how much better (if any) it performs. With the larger valves it should pull harder above 5000 rpm. My new Harbor Freight air compressor pump is making an unusual sound from the left cylinder and I suspect it already has a intake reed valve problem. I'll contact Harbor Freight and ask them what they want to do. I've only had it for about 8-9 days so they should warranty it.
    Attached Thumbnails Attached Thumbnails 1971-corvette-engine-rebuild-october-2016-001-4-jpg   1971-corvette-engine-rebuild-october-2016-002-4-jpg  

  6. #96
    Member LLC5's Avatar
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    Quote Originally Posted by toobroketoretire View Post
    I'll contact Harbor Freight and ask them what they want to do. I've only had it for about 8-9 days so they should warranty it.


    Not if they've read any of your posts.
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  7. #97
    I Officially Started My Project This Morning 82ColEd's Avatar
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    And TBTR isnt listening again to anything anyone says..
    Not that anyone has to, but whats the point of coming here? Spreading doubtful "wisdom"? Dunno..
    I'll unsubscribe from this thread and put TBTR on my ignore list. Not that he will read that, care or be bothered.

    I admit to admire the ones who continue to try and advise.


    Stefan
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  8. #98
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    Quote Originally Posted by 82ColEd View Post
    I admit to admire the ones who continue to try and advise.


    Stefan
    I think we all know he won't listen. It's more so that no one follows his advice without knowing the danger.
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  9. #99
    Member LLC5's Avatar
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    Quote Originally Posted by Antz81 View Post
    I think we all know he won't listen. It's more so that no one follows his advice without knowing the danger.


    Exactly.
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  10. #100
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    Default Harbor Freight Air Compressor Pump

    Wow, I can't believe the difference this new compressor pump makes when I'm using my air tools. I blew my garage out this morning and my new pump kept up with my blow gun. Then I did some sandblasting and it kept up with that. The old Harbor Freight inline twin cylinder pumps were made in two versions; the common`2-3/4" X 1-1/2" bore/stroke and an uncommon 3" X 1-1/2" bore/stroke. The larger pump used a heavier duty crankshaft but otherwise looked almost identical. This new v-twin pump has a 1-1/2" diameter crankshaft and larger bore and stroke giving it a 1-1/2 times increase in output. Being a v-twin it vibrates a lot more because the compression cycles aren't spaced 180 degrees apart like the inline twins so it goes pump pump.................pump pump.................pump pump................pump pump.

    I just installed a new starter solenoid on my '71. It has been engaging but not spinning because the contacts were burned. On a cold start I can't see any smoke at all which is a good sign. I'll NEVER buy "no name" piston rings again because they are almost certainly made in China.

  11. #101
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    I enjoy the answers rather than TBTR's blathering.

    TBTR: It isn't bubbles in the casting; it is porosity in the casting. Hopefully. you sand blasted the rust. No offense; however, that was quite a butcher job in the cylinder head.. Whatever tool it was you used; throw it away.
    Whoosh, and blur

  12. #102
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    Default Less Friction Now

    I had to reduce the idle speed again this morning because the friction between the piston rings and cylinder walls is lessening with each time I drive it.

  13. #103
    Member LLC5's Avatar
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    Quote Originally Posted by kpic View Post
    I enjoy the answers rather than TBTR's blathering.

    TBTR: It isn't bubbles in the casting; it is porosity in the casting. Hopefully. you sand blasted the rust. No offense; however, that was quite a butcher job in the cylinder head.. Whatever tool it was you used; throw it away.


    I'm without doubt that the tool was the sharpest part of that operation.

    Throwing it away is a good idea....
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  14. #104
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    Quote Originally Posted by LLC5 View Post
    I'm without doubt that the tool was the sharpest part of that operation.

    Throwing it away is a good idea....

    Too sharp a tool for the operator's expertise or better said, lack thereof.

    LLC5, you lost me, with throwing it away; did you mean the tool or its operator??

    Quote Originally Posted by toobroketoretire View Post
    I had to reduce the idle speed again this morning because the friction between the piston rings and cylinder walls is lessening with each time I drive it.
    No Bon Ami this time??

    To be blunt, I've purchased more than a few new cars and no of them required an idle adjustment.
    Last edited by kpic; 10-27-16 at 09:14 PM.
    Whoosh, and blur

  15. #105
    Member LLC5's Avatar
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    Quote Originally Posted by kpic View Post

    Too sharp a tool for the operator's expertise or better said, lack thereof.

    LLC5, you lost me, with throwing it away; did you mean the tool or its operaton?

    I started out with the tool, but you do bring up a good point. I did mention getting a new engine rebuilder......

    I'll leave it up to interpretation.
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