# 2006 Nissan Frontier - Stuck valve

**URL:** <https://community.cartalk.com/t/2006-nissan-frontier-stuck-valve/142406>\
**Category:** Maintenance/Repairs\
**Tags:** nissan\
**Created:** [June 17, 2019, 2:03am UTC](https://community.cartalk.com/t/2006-nissan-frontier-stuck-valve/142406 "2019-06-17T02:03:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![TimMcGowen](https://avatars.discourse-cdn.com/v4/letter/t/ecae2f/32.png) [@TimMcGowen](https://community.cartalk.com/u/TimMcGowen)\
**Post date:** [June 17, 2019, 2:03am UTC](https://community.cartalk.com/t/2006-nissan-frontier-stuck-valve/142406/1 "2019-06-17T02:03:42Z")

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I have a valve stuck open. Do you think MMO will help free up the valve?

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**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\
**Post date:** [June 17, 2019, 2:06am UTC](https://community.cartalk.com/t/2006-nissan-frontier-stuck-valve/142406/2 "2019-06-17T02:06:03Z")

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For a few $$$ worth a try,

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [June 17, 2019, 2:02pm UTC](https://community.cartalk.com/t/2006-nissan-frontier-stuck-valve/142406/3 "2019-06-17T14:02:00Z")

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> [@TimMcGowen](#):
>
> I have a valve stuck open

How do you know this? How do you know the valve isn’t burnt or bent?

A stuck valve will usually become unstuck when the piston comes up and smacks it closed. At that point, it may never completely close since it is now bent.