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plugs and cam

This is a discussion on plugs and cam within the Internal Engine forums, part of the LSx Technical Help Section category; When you do a cam swap do you have to remove the spark plugs?...

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    Member blk_jaws's Avatar
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    plugs and cam

    When you do a cam swap do you have to remove the spark plugs?

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    it's not required but since you're going to be taking everything apart you might as well. I think a lot of people go with NGK TR55's, and NGK TR6's if you go nitrous.

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    Member silverz28camaro's Avatar
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    You do if you replace the valve springs. you will need to pressurize the cylinder when you remove the springs to prevent the valve from falling
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    Member blk_jaws's Avatar
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    Quote Originally Posted by silverz28camaro View Post
    You do if you replace the valve springs. you will need to pressurize the cylinder when you remove the springs to prevent the valve from falling
    Thats what I wanted to know

    Thanks

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    Member blk_jaws's Avatar
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    I had another question.

    If I change the springs with the cam still in the car will still need to pressurize the cylinder?

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    My Neighbors Hate Me!!! lvbroham1's Avatar
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    Quote Originally Posted by blk_jaws View Post
    I had another question.

    If I change the springs with the cam still in the car will still need to pressurize the cylinder?
    Yes, the valves will still fall even if the cam is still in there. you still need to pressurize the cylinder to get the spring out.

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    Member silverz28camaro's Avatar
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    Quote Originally Posted by lvbroham1 View Post
    Yes, the valves will still fall even if the cam is still in there. you still need to pressurize the cylinder to get the spring out.
    Agree. the cam only opens the valves. The springs are what keeps the valve up. once you get the can torn down you will see exactly how everything works. go to www.ls1howto.com and read up a little on the cam swap. If you do not feel 100% confident on doing it yourself then either have someone experienced with this help out or a good shop. Its too much to risk if there is something not done right.

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