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Slow Steve
Samba Member
Joined: October 23, 2008
Posts: 715
Location: Midlothian, VA
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 Posted: Fri Sep 13, 2013 7:59 am Post subject: Pressure plate bolts |
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Hey quick questions sambinians. I picked my 66 single up in pieces and ..well missing most. I'm ready to put the clutch/pressure plate on and move forward, but I'm missing the pressure plate bolts. Can anybody tell me what size they are, and torque? Thanks!
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BarryL wrote:
100 years from now when they have reverse atom regeneration attractor technology perfected and in a hand held back yard mechanic's price range, someone will dig up this thread and go, "What were those guys thinking? The whole thing was all there just waiting to be re-atomized. Funny how easily they cut them up back then."
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74 911
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crofty
Judas of the North
Joined: August 09, 2000
Posts: 19672
Location: Land of Whine and Phonies
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| Posted: Fri Sep 13, 2013 8:05 am Post subject: |
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M8x20
I think they are torqued to 18lbs using a star pattern
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Slow Steve
Samba Member
Joined: October 23, 2008
Posts: 715
Location: Midlothian, VA
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| Posted: Fri Sep 13, 2013 8:15 am Post subject: |
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| crofty wrote: |
M8x20
I think they are torqued to 18lbs using a star pattern |
Thanks! off to the hardware store I go. 
_________________
BarryL wrote:
100 years from now when they have reverse atom regeneration attractor technology perfected and in a hand held back yard mechanic's price range, someone will dig up this thread and go, "What were those guys thinking? The whole thing was all there just waiting to be re-atomized. Funny how easily they cut them up back then."
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74 911
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65 13w Deluxe
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76938
Location: Sneaking up behind you
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| Posted: Fri Sep 13, 2013 8:29 am Post subject: |
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They're hardened Grade 10.8 so do NOT get soft bolts.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
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Last edited by Glenn on Fri Sep 13, 2013 12:13 pm; edited 1 time in total |
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Slow Steve
Samba Member
Joined: October 23, 2008
Posts: 715
Location: Midlothian, VA
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| Posted: Fri Sep 13, 2013 8:55 am Post subject: |
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| Glenn wrote: |
| They're hardened Grade 10.8 so do NOT get soft bolts. |
Thanks Glenn, good looking out. 
_________________
BarryL wrote:
100 years from now when they have reverse atom regeneration attractor technology perfected and in a hand held back yard mechanic's price range, someone will dig up this thread and go, "What were those guys thinking? The whole thing was all there just waiting to be re-atomized. Funny how easily they cut them up back then."
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74 911
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65 13w Deluxe
60 Ragtop |
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BulliBill
Samba Member
Joined: July 09, 2004
Posts: 4572
Location: St Charles, MO
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| Posted: Fri Sep 13, 2013 10:52 am Post subject: |
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| Glenn wrote: |
| They're hardened Grade 10.8 so do get soft bolts. |
Unless Glenn is spoofin' on the guy, I think he really meant to say "don"t" get soft bolts. Those should be special "hardened" bolts (with cut lock washers), don't just buy the normal stuff at the hardware store...
Bill Bowman
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 76938
Location: Sneaking up behind you
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| Posted: Fri Sep 13, 2013 12:13 pm Post subject: |
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Sorry.. .brain fart.
soft bolts will snap. You want hardened bolts.
Thanks Bill.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
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hazetguy
Samba Member
Joined: April 06, 2001
Posts: 10773
Location: iT StiNgeD iTseLf tO dEAd
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| Posted: Fri Sep 13, 2013 1:01 pm Post subject: |
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| interesting. i've only seen grade 8.8 on any original engine i've ever pulled apart, never once had a problem with "snapped" 8.8 bolts (new or used), the factory parts book does not specify higher grade bolts, and all the "without guesswork" books i looked at specify an 8G (8.8 ) bolt for this particular application. they also specify spring washers, not split lock washers. |
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Campy
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Joined: January 10, 2005
Posts: 4933
Location: Chico, CA
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| Posted: Fri Sep 13, 2013 9:11 pm Post subject: |
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That is what I have always used.
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Slow Steve
Samba Member
Joined: October 23, 2008
Posts: 715
Location: Midlothian, VA
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| Posted: Sat Sep 14, 2013 8:56 am Post subject: |
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Anybody know the thread pitch off hand? I do know it's not m8x1.0. I picked some up and well those didn't fit. I couldn't find hardened 1.5 or 1.25 in the immediate area. Thanks!
_________________
BarryL wrote:
100 years from now when they have reverse atom regeneration attractor technology perfected and in a hand held back yard mechanic's price range, someone will dig up this thread and go, "What were those guys thinking? The whole thing was all there just waiting to be re-atomized. Funny how easily they cut them up back then."
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74 911
72 914
65 13w Deluxe
60 Ragtop |
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crofty
Judas of the North
Joined: August 09, 2000
Posts: 19672
Location: Land of Whine and Phonies
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| Posted: Sat Sep 14, 2013 9:36 am Post subject: |
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My guess is the common 1.25 pitch
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| HamburgerBrad wrote: |
I slept on crofty's tent once. I passed out drunk from two bottles of Everett's brother's wine. |
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crofty
Judas of the North
Joined: August 09, 2000
Posts: 19672
Location: Land of Whine and Phonies
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| Posted: Sat Sep 14, 2013 9:37 am Post subject: |
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| Campy wrote: |
| That is what I have always used. |
here too even with a 1914 and kennedy plate
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Your Vanagon sucks, Stop waving at me.
| HamburgerBrad wrote: |
I slept on crofty's tent once. I passed out drunk from two bottles of Everett's brother's wine. |
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Slow Steve
Samba Member
Joined: October 23, 2008
Posts: 715
Location: Midlothian, VA
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| Posted: Sat Sep 14, 2013 9:44 am Post subject: |
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| crofty wrote: |
| Campy wrote: |
| That is what I have always used. |
here too even with a 1914 and kennedy plate |
Funny you say Kennedy. I'm putting a 2.2 Subie engine in with a Kennedy adapter. Here's a link if you want to take a look
http://kustomcoachwerks.com/forums/viewtopic.php?t=7676
_________________
BarryL wrote:
100 years from now when they have reverse atom regeneration attractor technology perfected and in a hand held back yard mechanic's price range, someone will dig up this thread and go, "What were those guys thinking? The whole thing was all there just waiting to be re-atomized. Funny how easily they cut them up back then."
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74 911
72 914
65 13w Deluxe
60 Ragtop |
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61SNRF
Samba Member
Joined: March 29, 2009
Posts: 4657
Location: Whittier 90602
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| Posted: Sat Sep 14, 2013 12:23 pm Post subject: |
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The bolts are M8 x 25mm x 1.25 pitch, grade 8.8.
I have seen other cars use 10.9 spec bolts on the pressure plate (Volvo for one), but those cars also make more HP and have more spring pressure than a stock VW does. Of course it wouldn't hurt to upgrade to harder bolts on any application.
All the torque specs you need are here in the Technical Archives...
http://www.thesamba.com/vw/archives/manuals/1971withoutguesswork.php
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Slow Steve
Samba Member
Joined: October 23, 2008
Posts: 715
Location: Midlothian, VA
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| Posted: Sat Sep 14, 2013 1:40 pm Post subject: |
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| 61SNRF wrote: |
The bolts are M8 x 25mm x 1.25 pitch, grade 8.8.
I have seen other cars use 10.9 spec bolts on the pressure plate (Volvo for one), but those cars also make more HP and have more spring pressure than a stock VW does. Of course it wouldn't hurt to upgrade to harder bolts on any application.
All the torque specs you need are here in the Technical Archives...
http://www.thesamba.com/vw/archives/manuals/1971withoutguesswork.php |
I'll probably go with the harder bolts, couldn`t hurt. Thanks for the info!
_________________
BarryL wrote:
100 years from now when they have reverse atom regeneration attractor technology perfected and in a hand held back yard mechanic's price range, someone will dig up this thread and go, "What were those guys thinking? The whole thing was all there just waiting to be re-atomized. Funny how easily they cut them up back then."
___________________
74 911
72 914
65 13w Deluxe
60 Ragtop |
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j.pickens
Samba Member
Joined: December 03, 2002
Posts: 9791
Location: Exit 7, New Jersey
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| Posted: Sun Sep 15, 2013 8:46 pm Post subject: |
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| Glenn wrote: |
| They're hardened Grade 10.8 so do NOT get soft bolts. |
No such thing as grade 10.8, you mean 10.9
The current replacement part shows an 8.8 bolt N 10 2210 4
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Danwvw
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splits-n-scoots
Samba Member
Joined: September 03, 2003
Posts: 500
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| Posted: Sun Sep 15, 2013 10:13 pm Post subject: |
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| Helical spring washers are an ineffective way from keeping nuts and bolts from loosening and can actually accelerate their loosening. |
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Erik G
Samba Member
Joined: October 16, 2002
Posts: 13280
Location: Tejas!
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| Posted: Wed Sep 18, 2013 8:57 am Post subject: |
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from another post, for future readers of this thread
| bill may wrote: |
| 10.9 german is grade 8 american. grade 12 german is 10 grade american. those goofy bolts on a vw with 8 are grade 6 american. this why hardware stores carry bolts with 8 on them instead of 10 which would be stronger. don't confuse grade 10 metric with grade 10 sae (american) |
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2Pack
Samba Member
Joined: September 20, 2005
Posts: 807
Location: Virginia
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| Posted: Wed Sep 18, 2013 5:20 pm Post subject: |
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| j.pickens wrote: |
| The current replacement part shows an 8.8 bolt N 10 2210 4 |
Where's that from j. ? The parts list at OACDP doesn't say the grade. Just curious.
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