4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

how detectable?????

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Old 05-26-2004, 11:25 PM
  #1  
Monty
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Default how detectable?????

How detectable is a bent valve?

Can it make my car run like crap?

Ok. My timing chain broke. And after thinking about it i just put on a new one? Started it up and it ran like crap!

So I decided to pull the head. I did and everything looks great. I konw for sure one valve took a hit. It's on the number 8 cylinder. The piston has a minor ding on it?

The only prob is the valve looks good. Just a little discolored where it took the ding.
Can this cause it to run so crapy????

(THis post is also in genral tech......since no one goes in there i moved it here!)
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Old 05-27-2004, 12:01 AM
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04mustang
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Default RE: how detectable?????

id help ya but i dont have a clue when it comes to internals. sorry
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Old 05-27-2004, 12:07 AM
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Monty
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Default RE: how detectable?????

damn I got all excited when i saw a reply


lol....thanks for the reply....

I have an AWSOME mechanic on route to my house right now....so ill see what happens ..

please keep the replys comin!!!!!!!
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Old 05-27-2004, 12:10 AM
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mdvaldosta
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Default RE: how detectable?????

1 slightly bent valve would only cause cause a mild skip. I would suggest you take both heads to a machine shop and have them go through them, they have the tools and experience to fix them right. Thats what I would do.
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Old 05-27-2004, 01:14 AM
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Dan04COBRA
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Default RE: how detectable?????

You need to set the timing again....

You're playing with fire by operating a motor with a damaged piston...
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Old 05-27-2004, 01:18 AM
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Monty
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Default RE: how detectable?????

I just had three old timers in my garage!!(old timers=mecanical geniusessesesss)

It was AWSOME!

well anyway. the gernal consesus is... there is no major probs. They are coming ova in tha morning to double check my work!!!

SHE WILL LIVE AGAIN!!!!!!!!!!!(knocks on wood)
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Old 05-27-2004, 01:43 AM
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Dan04COBRA
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Default RE: how detectable?????

Timing man!! I'm tellin ya!!
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Old 05-27-2004, 01:44 AM
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04mustang
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Default RE: how detectable?????

much respect for ya workin on your internals yourself. glad theres nothin bad wrong. hope everthing works out
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Old 05-27-2004, 04:52 AM
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Monty
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Default RE: how detectable?????

yeah....they say it's the timing......BUT I set it perfect....I dont know...im putting it back together in the morning.

I'll show them my timing skills before i put the cover back on.

If thats not it they said maybe a vacum.......

Ill keep yall posted.
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Old 05-27-2004, 10:16 AM
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mdvaldosta
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Default RE: how detectable?????

good lucky montey, don't forget if you had a bent valve it would show up in a compression test
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