Important! : saxo vts cam sprocket bolts loose

1. oorooke L-plater Joined: Mar 2009 Posts: 31

   #1 14th March 2009, 13:11

   i am doing my saxo vts turbo conversion and had it finished just before crimbo, and i deffently! tightent the cam sprocket bolts to the correct tourque stated in hainze manual (the three little ones that are ajustable) but AFTER IT HAd been idleing for bout 5 mins i turned it off and struck it up the next day and it went bang straight awaywhen i looked under the bonnet the sprocket had come loose and broke off and was left in lots of pieces and the other sprocket all the boltts was VERY loose.
   and am scared to put it back togeather for the same to happen again as it aint cheap to keep rebuilding it.
   if someone could give me a soloution would be very appretchated.
2. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

   #2 14th March 2009, 13:16

   Undone and done up loads of them and never had any probs. You can't use threadlock because the sprockets are light alloy, the threads will come out very easily. Perhaps your torque wrench is shit? OR your cams aren't worn in/bearings are too tight(cam ladders done up too tight/wearing in process not adhered to) putting a lot of stress on the belt and pulleys.
3. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #3 14th March 2009, 15:34

   ive never had a problem either, i just tighten them up till i think they are tight enough, what torque setting did you tighten them to?
4. oorooke L-plater Joined: Mar 2009 Posts: 31

   #4 14th March 2009, 17:58

   17 lb/ft but i think the book states 7lb/ft with i thought was far to low
5. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

   #5 14th March 2009, 18:58

   17lb? fucking hell. 7 is enough, they are aluminium!
6. Olly Saxperience Forum Bum Joined: Dec 2008 Meerkat Harborough Posts: 2638 Saxo vtr mk 2

   #6 14th March 2009, 20:16

   lol thats crazy behaviour! animalistic lol, Got the correct torque settings then completely ignored, Respect!!!!! Tbf uve gotta have balls to do that
   
   Hve u changed the cams? some of the sprocket bolts are different apparantely between mk1 and 2 saxo's and the cams are made for mk1. me thinks neways.
7. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #7 14th March 2009, 22:55

   its the bolt that bolts the cams to the pulleys which are different, and i think he means the 3 bolts for adjusting the pulleys. imo he has stripped the thread on them.
8. oorooke L-plater Joined: Mar 2009 Posts: 31

   #8 15th March 2009, 12:29

   year the 3 little bots so you guys torque them to 7lb/ft with no lock tight or anything
9. user_31642 Established Member Joined: Mar 2009 s-o-t Posts: 1174 S2 106 Rallye

   #9 15th March 2009, 12:34

   yeah i always do and never had a problem mate, as williamsvts wrote you must have over tightedned them and stripped the thread . .
10. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #10 16th March 2009, 10:35

    i dont use a torque wrench on them, just an 'educated guess' lol
11. lharrowing Frequent Poster Joined: Nov 2008 norwich Posts: 941 Citroen Saxo Westcoast MK1

    #11 17th March 2009, 17:55

    now thats experience / skill in action
12. oorooke L-plater Joined: Mar 2009 Posts: 31

    #12 20th March 2009, 16:38

    you mentioned that they are only ally but mine are mild steel the hub and the actual sprocket and the 3 little bolts are mild steel hight tensile and i put a magnet to them and it stuck so they defo not ally
13. oorooke L-plater Joined: Mar 2009 Posts: 31

    #13 22nd March 2009, 12:26

    is there any change it could of had a head of a 106 gti before i bought it would that make a diff??
14. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

    #14 22nd March 2009, 12:27

    they are an aluminium alloy.
    
    and no it makes no difference the 106 uses the same head. Either way if the sprockets snapped off you'll need a new head now anyway
15. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

    #15 22nd March 2009, 14:16

    unlucky mate torque guides and settings are there for a reason, if you think you know better than the guy that designed it then fair play
    
    normally i can tell by hand experience how tight it needs to be