Section : General

General Tools and Techniques messages

screw issues-urgent

Posted By : Mark Heaps, 04-Jun-2005, 04:11pm

hi all
found my water pump to be leaking last week so i took it off. upon doing so two of the bolts came off easily and on one of them only the nut came off, the screw part was in very tight, but i thought that wouldnÂ’t matter and it really helped lining up when the new pump arrived. about ten minuets ago i decided to attach the new pump. i put all the bolts back in and tightened things up. as i was doing the final tighten i noticed that the bolt where the screw had not come out would not tighten and the more i turned it the slacker it became. now the nut will turn relatively easy in either direction with the use of a spanner, however regardless of turns will not tighten or un tighten (ie it wonÂ’t come off but it wonÂ’t go on any tighter). what have i done?

mark spit 71 mark IV

Followups :

screw issues-urgent

Posted By : Adrian Lee, 04-Jun-2005, 04:14pm

Sounds like it has stripped the thread Mark,hopefully the thread on the stud.If the stud has stripped you'll need a new one and hope that the internal thread is'nt stripped,if it is then you can either helicoil it or retap it and fit a larger stud.
- screw issues-urgent
  
  Posted By : Mark Heaps, 04-Jun-2005, 04:16pm
  
  thanks,
  how do i get the old one off
  - screw issues-urgent
    
    Posted By : Adrian Lee, 04-Jun-2005, 04:18pm
    
    Vise grips,pull and twist at the same time.Try it first...if it does'nt work it'll be time for the "technical stuff"..............
    - screw issues-urgent
      
      Posted By : Mark Heaps, 04-Jun-2005, 04:31pm
      
      i dont have any vise grips so its off to halfords (only place near me open about now) if that does't work then well urm i'll be very stuck
      - screw issues-urgent
        
        Posted By : Van Hamlin, 04-Jun-2005, 06:01pm
        
        Halfords, machine mart etc do a good stud extractor set. It's metric but I've found the 6mm one also does 1/4", 8mm does 5/16", 10mm does 3/8" and 12mm does 1/2". This will gets studs out when mole grips don't. It costs about Â£25 and is one of those tools that you won't use a lot but you're really glad you had it when you do.
        Squirt a bit of WD40 at the stud where it goes in first.
        Van
        
        screw issues-urgent
        
        Posted By : Mark Heaps, 04-Jun-2005, 07:18pm
        
        thanks for all your help guys,
        bought a nut-splitter from halfords, which removed the nut. then a bit of WD40 and a pair of cheap mole grips got the rest out of the water pump housing. just need to order some new bolts and job done!
        thanks again.
        mark '71 mkIV spit1300