8v piston and rods

1. manic Regular Poster Joined: Jan 2012 hemel Hempstead Posts: 413 l200 worrior saxo vtr stock hatch Seat leon 20v

   #1 10th June 2013, 16:37

   as there is no retaining pin on the 8v 1.6 pistons . i guessing they got be warmed up. what temp have they gotta be cooked to to make the rod expand enough to knock the pin out.
   
   Manic
2. manic Regular Poster Joined: Jan 2012 hemel Hempstead Posts: 413 l200 worrior saxo vtr stock hatch Seat leon 20v

   #2 17th June 2013, 07:41

   Some one must know.
   
   manic
3. user_39461 Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.

   #3 17th June 2013, 08:34

   Don't you just drive them out cold? (I don't actually know but thought they were pressed out).

   1 user thanked this post: MartinObviously
4. user_57064 Established Member Joined: Jan 2012 south essex!! Posts: 2442 posi blue vtrs race car

   #4 17th June 2013, 08:50

   They should slide cold mate... Spin freely...

   1 user thanked this post: MartinObviously
5. MartinObviously Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge

   #5 17th June 2013, 08:58

   I concur!
   
   They should push out. A bit of persuasion with an aluminium or brass drift and a hammer should do it if you're that stuck.
6. manic Regular Poster Joined: Jan 2012 hemel Hempstead Posts: 413 l200 worrior saxo vtr stock hatch Seat leon 20v

   #6 17th June 2013, 08:59

   The pin spins freely in the piston but is a friction fit in the rod. if i push it out it may score either or even both.
   
   Manic
7. MartinObviously Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge

   #7 17th June 2013, 09:09

   How will it come out then? I don't think the rod will take too kindly to being heated and cooled in one spot.
   
   I'm missing something here...
8. user_57064 Established Member Joined: Jan 2012 south essex!! Posts: 2442 posi blue vtrs race car

   #8 17th June 2013, 09:11

   Circlips on either end i think... Like an internal c clip
9. manic Regular Poster Joined: Jan 2012 hemel Hempstead Posts: 413 l200 worrior saxo vtr stock hatch Seat leon 20v

   #9 17th June 2013, 09:20

   There is no circlips . haynes manual says to take the to an engineering shop or to citroen.
   
   manic
10. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

    #10 17th June 2013, 10:16

    the book says heat rods to 280c to fit pistons
    to remove you need a press and support piston around the boss
    suppose you might get away with heating in mum,s oven ,then cool the pins and knock out
11. MartinObviously Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge

    #11 17th June 2013, 10:18

    Quote:

    Originally Posted by manic There is no circlips . haynes manual says to take the to an engineering shop or to citroen. manic

    Must be pressed out then with a bit of cooling?
    
    Ninja'd
12. manic Regular Poster Joined: Jan 2012 hemel Hempstead Posts: 413 l200 worrior saxo vtr stock hatch Seat leon 20v

    #12 17th June 2013, 10:35

    Thanks axsaxo
    Mom would shit a brick lol. ill do it at work. use a fly press to push them out.
    on fitti g new rods would it be ok to freez the pins in liquid nitrigen to shrink then to push back in
    
    manic
13. user_39461 Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.

    #13 17th June 2013, 11:14

    Quote:

    Originally Posted by axsaxoman the book says heat rods to 280c to fit pistons to remove you need a press and support piston around the boss suppose you might get away with heating in mum,s oven ,then cool the pins and knock out

    Which book John (out of interest)?
14. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

    #14 17th June 2013, 11:36

    Quote:

    Originally Posted by manic Thanks axsaxo Mom would shit a brick lol. ill do it at work. use a fly press to push them out. on fitting new rods would it be ok to freez the pins in liquid nitrogen to shrink then to push back in manic

    the book is only suggesting putting pins in cold water before fitment --
    liquid N will def work and pretty sure rods would not need to be as hot using N on the pins
    the book shows a heating plate and use of a temp crayon
    --it changes colour when temp gets to correct temp
    the trick is to make a spacer up to cetralise the piston on the rod before fitment
    a bit of something fork shaped to fit between rod and piston
15. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

    #15 17th June 2013, 11:36

    Quote:

    Originally Posted by Ross Which book John (out of interest)?

    citreon tu engine overhaul book
16. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

    #16 17th June 2013, 11:39

    Quote:

    Originally Posted by greyjasper51 Circlips on either end i think... Like an internal c clip

    only on saxo vts engine --not on any 8v or tu5jp4 engine