wagzilla260rs
Offline
31 posts
1998 stegea 260rs bmw 528it 1957 nomad
sierra vista az
2-5-2008
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 10:06 PM 5/8/2008 |
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ARP that's all you need to know...go buy some
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S13xCrazy
Online
1629 posts
1991 240SX Coupe, 1993 240sx Hatch, 1993 240sx Vert, 1990 240sx Hatch 1986 Nissan D21 4x4, 1968 Stin
Dousman WI
10-8-2006
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 10:06 PM 5/8/2008 |
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 thats a terrible situation.Are you sure your torque wrench is accurate? Have you dropped it? Are you using the right conversion? (foot pounds, inch pounds, nM)
Check out our Nissan diagnostic cables!
Get your ECU Tune chip! Tuned to your modifications!**NOTE: Some vehicles need daughterboards.
1990 240sx Hatch Partout - WI BUY MY PARTS!!
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darens13
Online
135 posts
1993 240sx, 1996 accord, 1949 dodge pickup
Springfield Or
12-28-2007
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 10:11 PM 5/8/2008 |
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you should replace the bolts. they are sort of a one time use sort of thing, because they stretch a little when you torque them.
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sebazztard
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313 posts
1991 nissan 240sx se, 1995 nissan 240sx, 1992 subaru legacy
massena ny
3-2-2007
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| « Re: Are my bolts supposed to break? (S13xCrazy) | 10:12 PM 5/8/2008 |
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| Quote, originally posted by S13xCrazy » | | thats a terrible situation. Are you sure your torque wrench is accurate? Have you dropped it? Are you using the right conversion? (foot pounds, inch pounds, nM) |
very very very easy to mix up when not paying attention, we all do it. but this was the very first thing that came to mind (correct lbs). and no your bolts shouldnt break, they were designed for the torque! hope you get everything straightened out, sounds like a nightmare.
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h.240
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75 posts
1991 240sx hatchback
Hanover ON
5-1-2007
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 10:21 PM 5/8/2008 |
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The aluminum head shouldn't break before the bolts do. It is a good idea to replace the head bolts since they are designed to stretch under tension, I actually just read that in a Popular Mechanics magazine an hour ago. Here is the tightening procedure for the head bolts as per the FSM if you don't already have it -
I would also get your tourque wrench calibrated to make sure you are torquing to the correct specs.
"A momentum limit would be much cooler than a speed limit." - Dave Coleman
Tech Articles-http://www.240sxtech.com/
Old FAQ-http://www.240sx.org/faq/index.html
Tutorials-http://forums.nicoclub.com/zerothread/253879
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TheKryptKeeper
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137 posts
Albuquerque NM
1-30-2007
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| « Re: Are my bolts supposed to break? (h.240) | 11:00 PM 5/8/2008 |
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I juat bought a new torque wrench after the head bolts broke. Nissan insists that the bolts do NOT stretch and are to be reused.
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offroadbob
Offline
402 posts
96 240sx, 84 720 4x4
Flagstaff/ now Tucson AZ
3-2-2007
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 11:03 PM 5/8/2008 |
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it was 75 N/m not 75 ft/lbs
look at the FSM pic
| Quote, originally posted by h.240 » |
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 I was having the same problem when I was tightening down my cam cap bolts. 25 in/lbs or something like that and I kept snapping them at 25 ft/lbs. 
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sebazztard
Offline
313 posts
1991 nissan 240sx se, 1995 nissan 240sx, 1992 subaru legacy
massena ny
3-2-2007
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 11:05 PM 5/8/2008 |
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its a good idea to get new bolts, but you broke way too many to be just an accident. i think it was your torque wrench causing the breakage. personally after all the work i would get new bolts just for some insurance. live and learn right?
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TheKryptKeeper
Offline
137 posts
Albuquerque NM
1-30-2007
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| « Re: Are my bolts supposed to break? (sebazztard) | 11:22 PM 5/8/2008 |
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The head bolts broke at 75 ft-lb. I just got a new torque wrench. I just checked and I confused in-lbs with ft-lbs. So, that is that. However, I just checked my injectors, and one was 25 ohms and another was 45 ohms. :-( Do I have to replace them or can I fix them?
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e1_griego
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474 posts
89 fastback
Salem OR
9-20-2004
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You're not supposed to go past ~60 ft/lb for the head bolts....Alex
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lrb_2000
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2415 posts
'91 SE s13 Hatch, '95 SE s14
ID
5-3-2005
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| « Re: (e1_griego) | 5:18 AM 5/9/2008 |
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yeah.. I torqued my arp's to like 59ft/lbs.... the FSM says 55-63ft/lbsyou were looking at 75 to 84 nM
'91 Hatch - S13 - 5 lug, Meshies, Coilovers, GT35 12psi KA-T, Not Daily Driver.
'95 SE - S14 - Fully loaded, Leather, B&M Short Shifter, Daily Driver.My KA-T Videos
http://youtube.com/profile_videos?user=lrb13542
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S13xCrazy
Online
1629 posts
1991 240SX Coupe, 1993 240sx Hatch, 1993 240sx Vert, 1990 240sx Hatch 1986 Nissan D21 4x4, 1968 Stin
Dousman WI
10-8-2006
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| « Re: (lrb_2000) | 5:46 AM 5/9/2008 |
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^^ yeah,I think you made some mistakes haha. you aren't in the right units. These bolts don't just break.
Check out our Nissan diagnostic cables!
Get your ECU Tune chip! Tuned to your modifications!**NOTE: Some vehicles need daughterboards.
1990 240sx Hatch Partout - WI BUY MY PARTS!!
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OutToWinPAHC
Offline
1705 posts
1991 240sx Hatch with LS6 V8, TH350 Trans
Philadelphia PA
5-31-2007
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 6:37 AM 5/9/2008 |
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Too much torque and they are torque to yield bolts so they must be replaced after one use.
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2002 F-Body LS6, Port / Polished 243 heads with Patriot Racing dual gold springs, Magic Stick V.3 Cam 237/242 .603/.609 112LSA, 1.7:1 Rockers, TR 7.40 Hardened pushrods, LS7 lifters, Ported LS6 oil pump, Comp Cams timing gear / chain, 42# injectors, Fast 90mm TB, Fast TB coming soon.More power then a C6 Z06  , in a S13.5
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nissanman04
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1070 posts
'90 240sx auto-x project, 1993 LS400
Rochester NY
11-21-2004
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| « Re: Are my bolts supposed to break? (TheKryptKeeper) | 8:47 AM 5/9/2008 |
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| Quote, originally posted by TheKryptKeeper » | | The head bolts broke at 75 ft-lb. I just got a new torque wrench. I just checked and I confused in-lbs with ft-lbs. |
Yeah, you might break some bolts if you are using 12x the designed torque.
'90 KADE Hatch (DSP Autocross Project)
'90 RB20 Hatch (RIP  )
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TheKryptKeeper
Offline
137 posts
Albuquerque NM
1-30-2007
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| « Re: Are my bolts supposed to break? (nissanman04) | 4:55 PM 5/9/2008 |
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Hmm.... Well, damn.
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