Valve Stem Seal replacement - KR

Discussion in '16-valve' started by Southside, Feb 22, 2021.

  1. Southside Paid Member Paid Member

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    So I started stripping the engine down yesterday. So far the inlet manifold, throttle body, fuel lines, exhaust manifold and rocker case have been removed. I think I need to set TDC before I remove the timing belt and drain the coolant. Then finally remove the head. I'll upload some pictures soon but anyone have any advice before I continue to the next stage? I guess I should set it all up to TDC and mark everything?

    I'm thinking to mark the camshaft gear marks on to the chain using tippex, I'll do the dizzy too.

    I just don't want to forget anything!
     
  2. rubjonny

    rubjonny Administrator Staff Member Admin

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    dont technically have to have engine at TDC before strip down, its when you put it back together you need to be careful if the head is complete with cams as you dont want any valve contact
     
  3. Southside Paid Member Paid Member

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    That makes sense @rubjonny - Thanks

    Need to buy a tool to remove the stem seals, any recommendations?

    My rocker was previously painted and I want to go back to an OEM look. Even the inlet manifold has been painted :( The paint on the rocker is like powder and rubs off? I'll clean as much as I can but what paint can I use to go over this?
     
  4. rubjonny

    rubjonny Administrator Staff Member Admin

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    you can get dedicated stem seal pliers, I managed on my 8v without but it was a bit of a faff :lol:

    if it was me I would go back to bare alloy and leave it, but depends how long you want it looking nice for. silver paint/powder never looks quite right to me as its to even, maybe could find some kind of satin laquer to stop the alloy corroding so much? though once I buffed up my abf its stayed pretty nice looking for years if not clean then 'honest' as Mr Brewer likes to say :lol:
     
  5. Southside Paid Member Paid Member

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    engine bay.jpg

    This is what it currently looks like but I want to go back to stock.

    Removing the fuel lines, do they simply pull off from the inlet manifold? I tried but didn't look like it wanted to give?

    Is lapping the valves once I get there something I should be doing? or is it the case of checking and then deciding?
     
  6. rubjonny

    rubjonny Administrator Staff Member Admin

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    yes the injectors just pull out, can be well stuck in there try spraying some penetrating oil round the top of the injectors while pulling

    if you're going as far as pulling out the valves, lapping them back in is definitly worth doing while its apart. make sure you are careful when stripping engine ensuring all parts are labelled so they go backj in the same place they came from, sorting valve gear into egg boxes and poking valves thru card is a good trick

    as its all been painted nice you might find is easier to swap your stuff for original condition stuff then all you have to do is clean/polish alloy parts rather than strip paint off as well. just make sure the valve cover is the same type as yours the bolt down ones differ to nut and stud fixing ones. easy to ID, the later type nut & stud have 2 dips in the middle where the nuts go, early ones are flat
     
  7. Southside Paid Member Paid Member

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    regarding the stem seals, any particular brand I should buy or avoid? Or are they all equally as good as each other?
     
  8. rubjonny

    rubjonny Administrator Staff Member Admin

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    go for elring or genuine
     
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  9. Southside Paid Member Paid Member

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    I've just seen you can buy a head gasket set so I'm going to buy that!

    Where do most plp buy their stuff from? I'm going to change the water pump and timing belt at the same time :)
     
  10. rubjonny

    rubjonny Administrator Staff Member Admin

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  11. Southside Paid Member Paid Member

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    This is what I've found;
    https://www.vwspares.co.uk/product_info.php?products_id=831
    https://www.ebay.co.uk/itm/REINZ-02-25745-16-GASKET-SET-CYLINDER-HEAD/293837257039
    https://www.heritagepartscentre.com/uk/027198012h-cylinder-head-gasket-set-gti-16v.html

    vwspares says "Engines up to KR148313 have a 50mm inlet manifold, and you will need to purchase the correct 50mm inlet manifold gasket separately. Engines from KR148314 and all PL engines have the 42.5mm inlet manifold"

    I have no idea? I've got the 1990 KR engine if somebody can help me out?
     
  12. rubjonny

    rubjonny Administrator Staff Member Admin

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    pop a picture of your engine, even if your car originally had one size it may have been switched to another at some point
     
  13. Southside Paid Member Paid Member

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    does that help or do you need to see more of the bay?
     

    Attached Files:

    Last edited: Mar 5, 2021
  14. rubjonny

    rubjonny Administrator Staff Member Admin

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  15. Southside Paid Member Paid Member

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    The Reinz set any good?
     
  16. rubjonny

    rubjonny Administrator Staff Member Admin

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    yep oem quality as is the elring stuff
     
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  17. Southside Paid Member Paid Member

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    So I managed to get the head off today

    Managed to get some coolant into the pistons when I removed it but it was quickly wiped.

    Looking at the exhaust manifold, cylinder 1 seems to be burning a lot of oil going by what the outlet looks like?

    Do the valves look OK? 20210307_134609.jpg 20210307_135207.jpg
     
  18. Southside Paid Member Paid Member

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    Also, do you think I need to skim the head?
     
  19. rubjonny

    rubjonny Administrator Staff Member Admin

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    from what we can see all looks fine, only when you strip it down and do the required checks you'll know more. may be the valve guides on #4 were worn which is the real reason it started leaking oil so you'll be checking those as per the manuals as you go. make sure you carefully store each part as you go so everything stays in its original location come the rebuild. egg boxes work well for this and poke the valves thru a sheet of card marked up where they came from etc

    head skim I suppose may as well while you're stripping it right back, but usually if its not overheated then you're ok. also could could have the guides done at the same time, can be done DIY but its a fiddly job but easily done in a proper workshop while you've already got it booked in. your call on that
     
  20. Southside Paid Member Paid Member

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    any links to those guide would be appreciated @rubjonny :)

    Looking at the gaskets, the rocker and inlet manifold look new so I'm thinking of only buying the ones I need. What do you think? or shall I just change them all?

    Also, the valve stem seals included in those kits, are they any good? I'm thinking of the Reinz kit if I was going to go down that route! Other brands out there inc Meyle and Elring. Any suggestions?
     

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