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Accidently bent closed valve with mallot.

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Old 08-20-2015, 03:18 AM
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Accidently bent closed valve with mallot.

I was removing my valve springs to do a cam swap on my 383 when one stubborn valve lock wedged itself in the retainer wrong and wouldnt come out. Eventually the lock stripped its self off when i pulled it and beat on it(was STILL very stuck in the retaineralso needless to say I went with a new spring). In the process i bent the valve very slightly. It will now open comfortably within the lift range of the cam (.515 with 1.6 rockers) but beyond that it gets stuck in the guide. My question is could I just tap it back into place the same way I bent it and run it? Or will i need a machine shop to work on it?

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Old 08-20-2015, 03:20 AM
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Re: Accidently bent closed valve with mallot.

Not A high reving motor maybe 5500 to 6000 rpm
Old 08-20-2015, 07:05 AM
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Re: Accidently bent closed valve with mallot.

I think you already know the answer and are just looking for someone to help you rationalize what you have already decided to do instead.
Old 08-20-2015, 07:25 AM
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Re: Accidently bent closed valve with mallot.

yeah, bend that biotch back into shape and run it. Then check back here on how to rebuild it the right way.

C'mon......you know the answer.

Thursday humor......that advice was sarcasm.
Old 08-20-2015, 07:54 AM
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Re: Accidently bent closed valve with mallot.

Id slap it in my valve machine and and see how un-true it is. It depends on where the bend is. If its right under the head of the valve, some ppl will straighten it as good as they can, and then grind the face true so it will lay flat on the seat.

HOWEVER, valves are cheap.

maybe think about, do you want to upgrade to nicer valves? What type of heads? is it worth it?

If you are on a budget, I cant imagine a shop charging more than the price of a new valve to straighten it... Depends on valve type, shop and how busy they are.

-D
Old 08-20-2015, 07:57 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by Bob88GTA
yeah, bend that biotch back into shape and run it. Then check back here on how to rebuild it the right way.

C'mon......you know the answer.

Thursday humor......that advice was sarcasm.
Well heck, spin her up fast and get her good and hot and she will straighten out fine!! Dont pay any attention to the smoke or metal grinding on metal noise. It will eventually stop. Come to a screeching hult actually. Then you know she is fixed.
Old 08-20-2015, 08:10 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by -=Z28=-
Well heck, spin her up fast and get her good and hot and she will straighten out fine!! Dont pay any attention to the smoke or metal grinding on metal noise. It will eventually stop. Come to a screeching hult actually. Then you know she is fixed.
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Old 08-20-2015, 08:16 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by Cameeeero
I was removing my valve springs to do a cam swap on my 383 when one stubborn valve lock wedged itself in the retainer wrong and wouldnt come out. Eventually the lock stripped its self off when i pulled it and beat on it(was STILL very stuck in the retaineralso needless to say I went with a new spring). In the process i bent the valve very slightly. It will now open comfortably within the lift range of the cam (.515 with 1.6 rockers) but beyond that it gets stuck in the guide. My question is could I just tap it back into place the same way I bent it and run it? Or will i need a machine shop to work on it?
A mallet on a valve? You need to take the head off now and replace it.
Old 08-20-2015, 06:30 PM
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Re: Accidently bent closed valve with mallot.

The valve lock had dug itself into the retainer pretty hard it only came out after hours of work. What the h*** was I supposed to do? Anyway I took it to a local shop and he said he would cut it off, get a new valve and do a good valve job on it.

I was hoping I could cut a corner here because I start college next monday and this is my ONLY ride there and to work. I guess missing the first few days couldn't hurt.
Old 08-20-2015, 06:59 PM
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Re: Accidently bent closed valve with mallot.

Originally Posted by Cameeeero
The valve lock had dug itself into the retainer pretty hard it only came out after hours of work. What the h*** was I supposed to do? Anyway I took it to a local shop and he said he would cut it off, get a new valve and do a good valve job on it.

I was hoping I could cut a corner here because I start college next monday and this is my ONLY ride there and to work. I guess missing the first few days couldn't hurt.
I understand being in college and being on a budget, but, as you found out, cutting corners only leads to more problems. So are you doing both sides at the same time? If not, you should (if you can afford it.) Doing only one side will probably give you better compression on the worked side than the non worked side. Just say'n, when it comes to cars, motors etc., try not to cut corners, or you'll pay for it in the end.
Old 08-21-2015, 03:53 PM
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Re: Accidently bent closed valve with mallot.

You're right . the peace of mind of doing something right is worth more than how ever much money you saved doing it wrong
Old 08-24-2015, 08:37 PM
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Re: Accidently bent closed valve with mallot.

Originally Posted by red rock
A mallet on a valve? You need to take the head off now and replace it.
That's how I used to do it too.. Never bent a valve

-- Joe
Old 08-24-2015, 08:39 PM
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Re: Accidently bent closed valve with mallot.

Originally Posted by Cameeeero
The valve lock had dug itself into the retainer pretty hard it only came out after hours of work. What the h*** was I supposed to do? Anyway I took it to a local shop and he said he would cut it off, get a new valve and do a good valve job on it.

I was hoping I could cut a corner here because I start college next monday and this is my ONLY ride there and to work. I guess missing the first few days couldn't hurt.
I made a tool by welding a air hammer bit to a socket. Vibrates the snizzle out of the retainer and the locks jump out.

-- Joe
Old 08-24-2015, 09:01 PM
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Re: Accidently bent closed valve with mallot.

Originally Posted by anesthes
That's how I used to do it too.. Never bent a valve

-- Joe
That you know of.
Old 08-24-2015, 09:16 PM
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Re: Accidently bent closed valve with mallot.

Originally Posted by red rock
That you know of.
I'd have noticed.

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Old 09-09-2015, 02:03 PM
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Re: Accidently bent closed valve with mallot.

Originally Posted by red rock
That you know of.
most shops lay the head on a table with a thick rag under the head incase the valve does come off the seat . then they place a socket over the retainer and give it a whack with a hammer and the locks pop out , theres nothing wrong with doing it this way unless u have some really stiff valve springs
Old 09-10-2015, 05:11 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by project89
most shops lay the head on a table with a thick rag under the head incase the valve does come off the seat . then they place a socket over the retainer and give it a whack with a hammer and the locks pop out , theres nothing wrong with doing it this way unless u have some really stiff valve springs
That's how I was taught, and most everyone I know. But I didn't feel compelled to argue with folks who probably have never rebuilt an engine


-- Joe
Old 09-10-2015, 08:15 AM
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Re: Accidently bent closed valve with mallot.

Do you guy's remember the op's 1st post? Joe, you shouldn't argue anyway, your the moderator. By the way, your doing a lot of assuming also.
Old 09-10-2015, 08:29 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by red rock
Do you guy's remember the op's 1st post? Joe, you shouldn't argue anyway, your the moderator. By the way, your doing a lot of assuming also.
I get to argue. We encourage solid tech debates.

His first post? Yeah he screwed up. It happens. He obviously hit it at an angle, not straight on. He owned his mistake.

I used to change springs a lot when I bracket raced. Heck, I wrote the spring math for dummies post back in 2004.


-- Joe
Old 09-10-2015, 08:32 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by anesthes
I get to argue. We encourage solid tech debates.

His first post? Yeah he screwed up. It happens. He obviously hit it at an angle, not straight on. He owned his mistake.

I used to change springs a lot when I bracket raced. Heck, I wrote the spring math for dummies post back in 2004.


-- Joe
Good job! But that's my point, If you hit one incorrectly you just hit a foul ball.
Old 09-10-2015, 08:35 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by red rock
Do you guy's remember the op's 1st post? Joe, you shouldn't argue anyway, your the moderator. By the way, your doing a lot of assuming also.
We're waiting to hear your better method.

I learned to use a light hammer too. Tapping the retainer around the perimeter, and not playing Thor is a valid way of doing it.
Old 09-10-2015, 08:50 AM
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Re: Accidently bent closed valve with mallot.

Originally Posted by red rock
Good job! But that's my point, If you hit one incorrectly you just hit a foul ball.
It's like scratching the crank or cylinder wall removing rods. Sometimes the rubber hose or bolt guard falls off and you screw up. It's a rookie thing.

-- Joe
Old 09-18-2015, 04:00 PM
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Re: Accidently bent closed valve with mallot.

Its how I was taught too, to take em apart and make sure they are seated correctly both. Used a soft hammer/hard plastic.

Makes quick disassemble work. It would suck to get one stuck and not have the tool to get it out.
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