flywheel bolt torque - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• flywheel bolt torque by dave friday on 30 Nov, 2008 15:56
• Morning all, i'm going to replace the leaky crank shaft oil seal [flywheel end] an my jx engine,what should the bolts be torqued to?[my "Bentley" only covers the non turbo engine].
  Ta.
• #1 by zukgod1 on 01 Dec, 2008 08:11
• Turbo/ non turbo will be the same.
• #2 by dave friday on 01 Dec, 2008 08:59
• Cheers Zuk, so 75nm[54 ftlb] the reason i ask is because a well respected mechanic said 30nm+90deg.And can i re-use the bolts?.
  ta.
• #3 by zukgod1 on 01 Dec, 2008 09:05
• Hmm, now you have me wondering.
  I don't believe the flywheel bolts need to be replaced. I have reused mine SEVERAL times now.
  
  Now I'm not condoning this or saying its correct but I put Red loctite on them and used my 3/8 impact till I felt good and went from there.
  I torqued them the first few times I had it apart but grew tired of holding the damn thing to get them torqued.
  In this case don't do as I do but do as the Bentley instructs.
• #4 by arb on 01 Dec, 2008 09:14
• Quote from: "zukgod1"

  
  
  Now I'm not condoning this or saying its correct but I put Red loctite on them and used my 3/8 impact till I felt good and went from there.
  I torqued them the first few times I had it apart but grew tired of holding the damn thing to get them torqued.
  In this case don't do as I do but do as the Bentley instructs.

  
  
  Me too, same procedure. I know they should be torqued, and I torque all the other engine bolts, but these have so much redundancy.
• #5 by dave friday on 01 Dec, 2008 09:37
• So 30nm+90deg is wrong?, .
• #6 by arb on 01 Dec, 2008 09:40
• Quote from: "dave friday"

  So 30nm+90deg is wrong?, .

  
  
  I don't have my Bradley here... the + 90 deg doesn't ring a bell for the flywheel, but it could be in the book. Do you have one ?
• #7 by dave friday on 01 Dec, 2008 10:02
• Yes i do but it only covers the early cs engine, i thought the 30nm+90 was/is an up date [ for the syncro van perhaps?].
  i just dont want to balls it up!.
• #8 by zukgod1 on 01 Dec, 2008 10:06
• It will be the same across the board.
  If it says 30nm+90 then that's the ticket.
• #9 by dave friday on 01 Dec, 2008 10:09
• Cheers.
• #10 by smutts on 04 Dec, 2008 13:27
• There are two different torque values depending on whether the bolts are "shouldered" or not. Don't ask how I know this. :| .
  Fortunately loctite has been my friend, so far. :wink:
• #11 by fatmobile on 04 Dec, 2008 21:10
• You guys are talking pressure plate bolts.
   Torque the flywheel bolts that high and you WIL be replacing them.
   I think it's around 15 ft lbs,.. I'll check my "Bradley" hee hee
   Yep,... 15 ft. lbs
  
  You have everything else straight about replacing the rear seal?
   Got the sour cream container special tool? Don't want to flip the lip,.. or you'll be doing it again.
  
   And I swear; it doesn't matter how flat the seal is with the edge of the seal holder,.. that seal holder isn't square with the crank.
   Take a look at the seal before you remove it. I noticed that one I pressed in wasn't flush with the seal carrier so I looked close at the next, before I remooved it,... it wasn't flush.
   I use a cutdown old pressure plate and some washers to press the rear seal in,... so it's square with the crank.
• #12 by zukgod1 on 05 Dec, 2008 07:29
• Quote from: "fatmobile"

  
   I use a cutdown old pressure plate and some washers to press the rear seal in,... so it's square with the crank.

  
  
  
  
  That's a really good idea.
• #13 by dave friday on 05 Dec, 2008 13:54
• Cheers all, smutts thanks for the info re the bolts, the part number did change in 86!...the bolts i took out [when i replaced the seal last year, re-build,new head, bearings etc] are shouldered, i will have to check what bolts i fitted!, any idea about the 30nm+90deg?.fatmobile, the seal i fitted was a bit loose [cheep crap] ,the one i'm fitting this time is a vw one complete with the carrier,thanks for the info, i'll make sure its square to the crank.
• #14 by smutts on 05 Dec, 2008 14:10
• Aha! Found it! "Bolt without shoulder, 55lb ft". "Bolt with shoulder 74lb ft" So says my book of lies (1990 haynes) and don't forget the loctite! There are many books that give the wrong value, which is why I have been waiting for something ominous to happen to my flywheel, as the info I had in my old book was bollocks. Two years of waiting so far, so I might have got away with it! :mrgreen: Clutch kits often come with new bolts.