2nd Generation This includes all Eclipses, and Talons built from 1995-1999

Head question! Please help need someone who knows 420a motor!

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Old Oct 1, 2007 | 07:24 PM
  #11  
nick_200321's Avatar
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Default RE: Head question! Please help need someone who knows 420a motor!

are you possibly cross-threading them? not putting them in straight? you said they are NEW bolts, correct?
 
Old Oct 1, 2007 | 07:33 PM
  #12  
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Default RE: Head question! Please help need someone who knows 420a motor!

the first time it happened i used the same ones. then i got it redone, bought new bolts n one snaped again
 
Old Oct 1, 2007 | 08:54 PM
  #13  
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Default RE: Head question! Please help need someone who knows 420a motor!

Over tightening them? What sort of wrench are u using?
 
Old Oct 1, 2007 | 09:55 PM
  #14  
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Default RE: Head question! Please help need someone who knows 420a motor!

torque wrench. 1/2in tho. thats were i think the problem is.
 
Old Oct 2, 2007 | 07:42 PM
  #15  
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Default RE: Head question! Please help need someone who knows 420a motor!

First, many torque wrenches have different scales for foot pounds, inch pounds and newton meters. You sure you have the right scale? If so, and you have quality head bolts, your wrench is got to be off. Just to clarify we are talking the head bolts and not the valve cover bolts correct?
 
Old Oct 2, 2007 | 07:58 PM
  #16  
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Default RE: Head question! Please help need someone who knows 420a motor!

cam bolts. the 10mm bolts that cover over the cams
 
Old Oct 3, 2007 | 06:16 AM
  #17  
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Default RE: Head question! Please help need someone who knows 420a motor!

ORIGINAL: itsme71190

cam bolts. the 10mm bolts that cover over the cams
what torque are you using on them?
 
Old Oct 3, 2007 | 02:19 PM
  #18  
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Default RE: Head question! Please help need someone who knows 420a motor!

the manual i have says 21. which i thought from the begining was BS. so i looked online today. its only 9........
 
Old Oct 3, 2007 | 06:35 PM
  #19  
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Default RE: Head question! Please help need someone who knows 420a motor!

ORIGINAL: itsme71190

the manual i have says 21. which i thought from the begining was BS. so i looked online today. its only 9........
ah that would do it. Actually here is the correct torque spec on them

Inner Caps (2,3,4,5)= 9ftlb
Outer Caps (1,6)= 21ftlb

So im guessing its the inner ones that you are breaking
 
Old Oct 3, 2007 | 08:34 PM
  #20  
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Default RE: Head question! Please help need someone who knows 420a motor!

yea, the manual i have doesnt specify which r which. but i found out, thanks all
 
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