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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 02-06-2007, 06:00 PM   #1
MavericStephenc
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warped head?

ok if you have a warped heay you can machine it to correct the warp right?
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Old 02-06-2007, 06:38 PM   #2
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depends how bad it is, take it up to your local machinest(spelling?) lol
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Old 02-06-2007, 06:41 PM   #3
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no you cant, if you have a warped head you need to have it straightened. if you just resurface flat again, then when you bolt it onto the block, the cam towers will no longer be straight and your cams wont turn.

this all depends on how warped your head is.

and when taking it to a shop you need to consider how they are going to straighten it out. the most common method is to bolt it to a plate and then heat it up in a oven. this isnt a very good way to do it, as it takes the hardness out of the metal. the way we do it at my shop is to use isolated head to relieve the stress in necessary spots, they should never have to raise the heat at any one point to above 300 degrees.
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Old 02-06-2007, 06:52 PM   #4
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cause i might have a warpedhead i wont know untili get it off. if it is the case where is your shop?
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Old 02-06-2007, 06:53 PM   #5
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Quote:
Originally Posted by lazierhobo
no you cant, if you have a warped head you need to have it straightened. if you just resurface flat again, then when you bolt it onto the block, the cam towers will no longer be straight and your cams wont turn.

this all depends on how warped your head is.

and when taking it to a shop you need to consider how they are going to straighten it out. the most common method is to bolt it to a plate and then heat it up in a oven. this isnt a very good way to do it, as it takes the hardness out of the metal. the way we do it at my shop is to use isolated head to relieve the stress in necessary spots, they should never have to raise the heat at any one point to above 300 degrees.
yup thats rigth and if its a ka dont never let the car over heat more than 4 times with it to the h. i did and now i gotta pay for the warped head was very lil warped was fixed but still coulda just payed for a headgasket and went on.also so i dont have to start a new theard anyone know how head studs could get bent. could they bend by over heating mine was bent and had to be replaced ive never heard of this but it happened.
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Old 02-06-2007, 06:54 PM   #6
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its a notch top sr
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Old 02-06-2007, 07:44 PM   #7
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my shop is in upstate ny

we just finished straightening my SR
when i picked it up, it had been extremely over heated.
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Old 02-06-2007, 08:27 PM   #8
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o would you have to straighten the block too if just the head cause if a warped head is the case i would sent it out.


btw how much to set it straight
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Old 02-07-2007, 12:20 PM   #9
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i dont think the block warps as easy as the head. for one i think the block is iron(ka atleast)and the head is aluminum so the head would be not able to take alot of heat without warping.
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