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Old 04-08-2009, 07:59 PM   #1 (permalink)
 
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Exclamation Having a little problem with my CYLINDER HEAD

i did a mini swap.. never got the vtec to work..(had to buy a oil pressure switch...had a problem wit a few other crap vtec related but anyway) FINALLY got the vtec to open up a few times and now it sounds like theres something jumping around in my cylinder head. so i took the valve cover off inspected it thoroughly and still nothing to be found. put everything back together sameeee sound.. like something is jumping up around in the head and getting slapped around by a rocker or something. i did valve lash so i know its not a valve tapping or anything.... anyone had this problem before?? any suggestions?
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Old 04-08-2009, 07:59 PM   #2 (permalink)
 
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also i put my hand on the valve cover n revved it a little and felt something hitting the valve cover but that could of been vibration from something else you know..but im pretty sure it was from something hitting the valve cover inside
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Old 04-09-2009, 09:07 AM   #3 (permalink)
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maybe lost motion assemblies?
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Old 04-09-2009, 09:09 AM   #4 (permalink)
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did you take out the oil control jet from the block?
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Old 04-09-2009, 09:46 AM   #5 (permalink)
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is this engine managment???
looks like engine building to me...
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Old 04-10-2009, 07:03 AM   #6 (permalink)
 
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yea the oiljet is gone
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Old 04-10-2009, 07:03 AM   #7 (permalink)
 
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Originally Posted by slowturbocx View Post
maybe lost motion assemblies?
what do you mean motion assemblies?
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Old 04-14-2009, 05:06 AM   #8 (permalink)
 
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anyone?
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Old 04-14-2009, 07:59 AM   #9 (permalink)
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start is up with the valve cover off, it will be a little messy but you'll be able to see whats goin on....
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Old 04-22-2009, 07:39 PM   #10 (permalink)
 
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ok heres another theory i have. since i have had quite a few over heating problems i BELEIVE that the over heating caused weakening in my valve springs and thats possibly whats tapping like crazy because i did valve lash and everything is to specs
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Old 04-23-2009, 01:03 AM   #11 (permalink)
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ok heres another theory i have. since i have had quite a few over heating problems i BELEIVE that the over heating caused weakening in my valve springs and thats possibly whats tapping like crazy because i did valve lash and everything is to specs
that's quite a conclusion to jump to
seems you haven't had much help with this topic but i think it's because you need to be more specific with the details: sound of the noise, what rpm, what conditions, what head, any other faults, how the swap went, what engine/piston/head combo. people don't want to be guessing in the dark.
so, valve lash adjusted properly?
oil jet removed?
all springs and bolts in place with lost motion and rocker assembly?
ignition and mechanical timing correct?
i really think your theory is a bit far fetched, and weak springs would only cause probs at high rpm. (unless a valve is bent?? )
it's not just a normal noise by any chance and you're listening too hard? they do make a small tapping noise by design
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Old 05-04-2009, 04:01 PM   #12 (permalink)
 
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Originally Posted by HoldOnNotDoneAccelerating View Post
that's quite a conclusion to jump to
seems you haven't had much help with this topic but i think it's because you need to be more specific with the details: sound of the noise, what rpm, what conditions, what head, any other faults, how the swap went, what engine/piston/head combo. people don't want to be guessing in the dark.
so, valve lash adjusted properly?
oil jet removed?
all springs and bolts in place with lost motion and rocker assembly?
ignition and mechanical timing correct?
i really think your theory is a bit far fetched, and weak springs would only cause probs at high rpm. (unless a valve is bent?? )
it's not just a normal noise by any chance and you're listening too hard? they do make a small tapping noise by design
it does it at idle cant hear it at high rpms, its a z6 head shaved no other problems really the swap went wwell it runs HARD its a d15b7 block everything is bolted on right and to torque specs the timing is correct the dizzy isnt advanced or retarded the noise honestly began after a few bad overheats. hence my conclusion because overheating would cause the springs to weaken
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Old 10-27-2009, 07:50 PM   #13 (permalink)
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springs are steel, you'd be hard pressed to fuck your springs and not melt the rest of your *aluminum* engine. check the lost motion assemblies, see if they're in upside down. that'd do it.
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Old 10-28-2009, 09:05 AM   #14 (permalink)
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i think i have a similar problem i have wierd noise too and i know its not the block and the head is all stock.

my setup is a d16y8 with a b7 block i will let you know more later
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Old 10-28-2009, 10:09 AM   #15 (permalink)
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like other posters suggested: check your lost motion assemblies.
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Old 10-28-2009, 03:47 PM   #16 (permalink)
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what did you touch/change/mess with right before you heard the noise?
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