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2.0 Liter Gas Discussion area for the venerable 2.0 liter 4-cylinder engine.

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  #1  
Old 12-26-2012, 12:32 PM
ccc171Registered Member ccc171 is offline
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Default What do bent valves act/sound like?

Not wanting to take the head back off I need to know what bent valves sound like, what sounds will be made when it happens and how the engine will act if there are any. So far the only issue I'm having is it runs like crap at idle, but seems to run fairly well otherwise. Never having damaged an engine I can only guess bent valves would be obvious, even if slightly bent.
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Old 12-26-2012, 03:36 PM
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Run a compression test. I had a car that burned a valve and was running on 3 cylinders. It ran but it barely idled and it had the weirdest sound, you could totally hear the constant miss.
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Old 12-26-2012, 04:20 PM
ccc171Registered Member ccc171 is offline
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When I turn the engine over by hand I don't hear or feel any interference and, as expected, is difficult to turn on the compression stroke. Being out only 1 tooth or so I'm hoping to have dodged a bullet.

Considering I'm still having issues with what sounds like a bad vacuum leak I'll most likely pull the intake again and run the compressions check anyway, just to eliminate the valves.
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Old 12-26-2012, 07:19 PM
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It will look and sound like this:

https://www.youtube.com/watch?v=pYPT...e_gdata_player

Maybe not as severe... But that's pretty typical of what you get if you snap the belt and just put another one on.

And no, it shouldn't happen if you're just off by a tooth or two
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Old 12-26-2012, 07:21 PM
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^ Yep that's what it sounds like.
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Old 12-27-2012, 09:18 AM
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Quote:
Originally Posted by Toad View Post
It will look and sound like this:

https://www.youtube.com/watch?v=pYPT...e_gdata_player

Maybe not as severe... But that's pretty typical of what you get if you snap the belt and just put another one on.

And no, it shouldn't happen if you're just off by a tooth or two


Ouch! I hate noises like that from engines! Lol
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Old 12-27-2012, 04:43 PM
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Glad that I listened to that too. Very impressive!!
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Old 12-27-2012, 06:02 PM
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Default Burn Notice

Ever see the episode where the star, "Michael," puts a bunch of silverware in a microwave and turns it on to create a bomb?

That's probably not what it will sound like. Maybe putting silverware in a garbage disposal will replicate the sound.
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Old 12-27-2012, 10:30 PM
ccc171Registered Member ccc171 is offline
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Mine is OK; just retimed and revs smooth.
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