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  1. #1
    b_dolla44's Avatar
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    installing riva valve train... how much air pressure in cylinder???

    following directions via riva, and they say no more than 80PSI to hold the valve up.... the problem is as soon as i start pushing down the retainer with the riva valve spring tool it opens the vavle...GEERRRRR!!!!!! Maybe i need a bigger compressor? My compressor is small so maybe it's time to step up to a big boy compressor.... anyone else have issues swapping yours?
    anyone turned a the stock springs and retainers to 8500 rpm...


  2. #2
    ZeXteR's Avatar
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    Quote Originally Posted by b_dolla44 View Post
    following directions via riva, and they say no more than 80PSI to hold the valve up.... the problem is as soon as i start pushing down the retainer with the riva valve spring tool it opens the vavle...GEERRRRR!!!!!! Maybe i need a bigger compressor? My compressor is small so maybe it's time to step up to a big boy compressor.... anyone else have issues swapping yours?
    anyone turned a the stock springs and retainers to 8500 rpm...
    Don't try change the springs with less than 80lbs . You need one compressor with pressure regulator, if you don't have one go to any good mechanic or buy it. Craftsman have good models, with 2 exit, vertical, 150bls +/_ US$ 250,00. Remember: one new head gasket and new head bolt set $240,00 (oem). Set this regulator between 80 - 90lbs and go to your job. If you use less than 70lbs, and press the valve with your fingers - the valve open, air go out of cylinder and... and... valve is down to top of piston .

    Read Riva instructions with attention before start this job...

  3. #3
    DaveC's Avatar
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    I have used 80-100 psi changing the springs. I had one valve that leaked air similar to yours, I removed the tool and lightly tapped the top of the valve stem 3-4 times. That solved the problem of it leaking for me.

  4. #4
    mrbtd's Avatar
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    Just put the cylinder you are working on @ tdc

  5. #5
    Moderator beerdart's Avatar
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    Quote Originally Posted by DaveC View Post
    I have used 80-100 psi changing the springs. I had one valve that leaked air similar to yours, I removed the tool and lightly tapped the top of the valve stem 3-4 times. That solved the problem of it leaking for me.
    Yep a dead blow hammer to the top of the valve to loosen the keepers.

  6. #6
    Having Fun jp1300r's Avatar
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    Quote Originally Posted by DaveC View Post
    I have used 80-100 psi changing the springs. I had one valve that leaked air similar to yours, I removed the tool and lightly tapped the top of the valve stem 3-4 times. That solved the problem of it leaking for me.
    Quote Originally Posted by beerdart View Post
    Yep a dead blow hammer to the top of the valve to loosen the keepers.

    +1, just needs a little tap. Retainer and valve keepers just sticking. Make sure you stuff paper towels in the spark plug holes and oil return holes, too.

  7. #7

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    + 1 0n all the above.

  8. #8
    Eric Ocman's Avatar
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    very very easy to do bro. The light tap works. I used a toothpick and tweezers as tools to help me remove/replace the retainers. as JP said dont forget th keep the plug holes and the oil returns clogged with a paper towel or something.

  9. #9
    b_dolla44's Avatar
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    Quote Originally Posted by mrbtd View Post
    Just put the cylinder you are working on @ tdc
    Are you saying to let the piston stop the valve from going down? Or at tdc you have more pressure in the cylinder???

  10. #10
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    Quote Originally Posted by mrbtd View Post
    Just put the cylinder you are working on @ tdc

    Is there a risk of scoring the crown or the valve by doing this?

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