 Rocker assembly torque |
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| newdeal2 |
 Nov 7 2004, 11:25 PM
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#1
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I used the Tom Wilson book on some of my engine rebuild. It says to tighten the rocker shafts down at 18 Ft lbs.
Is this too much [Jake's video, I discovered after the fact, says less]? If so should I go back, reset and re adjust the valves? |
 
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| Brad Roberts |
Nov 7 2004, 11:40 PM
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#2
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914 Freak!  Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
18 is too much for that size of nut/stud. Should be in the 10 range if I recall correctly.
B |
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| MattR |
Nov 7 2004, 11:44 PM
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#3
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Advanced Member Group: Members Posts: 3,279 Joined: 23-January 04 From: SF Bay Area Member No.: 1,589 Region Association: Northern California |
Im having a helluva time with those rocker arms and studs. I went to 18 (per the red book), but Im thinking it was too much. (IMG:style_emoticons/default/headbang.gif) I need a new stud now.
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| newdeal2 |
Nov 7 2004, 11:47 PM
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#4
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Hmmm...so I go back and lighten it up? Is it possible I stretched the studs or am I getting anal here?! (IMG:style_emoticons/default/cool.gif)
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| Brad Roberts |
Nov 7 2004, 11:47 PM
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#5
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Common torque settings across the Porsche board just barely call for 18 on a M8 stud... NO WAY they would use 18 on a M5 stud.
B |
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| newdeal2 |
Nov 7 2004, 11:49 PM
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#6
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QUOTE(MattR @ Nov 7 2004, 09:44 PM) Im having a helluva time with those rocker arms and studs. I went to 18 (per the red book), but Im thinking it was too much. (IMG:style_emoticons/default/headbang.gif) I need a new stud now. Is this a "real" problem, I mean too much tension on the shaft? |
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| Brad Roberts |
Nov 7 2004, 11:51 PM
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#7
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
If anything it will strip the threads out of the puny nut.
B |
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| newdeal2 |
Nov 7 2004, 11:54 PM
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#8
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So...do I back off the torque or replace the studs? I had this problem before on a water cooled head and relaced the studs but that was a more critical location., i.e head studs.
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| Brad Roberts |
Nov 7 2004, 11:57 PM
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#9
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
The studs should be fine.. replace the nuts and inspect the studs.
B |
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| MattR |
Nov 7 2004, 11:58 PM
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#10
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Advanced Member Group: Members Posts: 3,279 Joined: 23-January 04 From: SF Bay Area Member No.: 1,589 Region Association: Northern California |
This is an M7 stud, not M5... atleast for the 2.0L heads.
Brad, do you guys have any rocker arm studs you can pull? |
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| Brad Roberts |
Nov 8 2004, 12:02 AM
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#11
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Hundreds upon hundreds of heads.. but Jake likes to use the VW type one pieces (I think)
The nut is 11mm I *thought* the small end of the stud was a M5. B |
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| Jake Raby |
Nov 8 2004, 03:15 AM
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#12
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Actuallymine are ARP units made just for the purpose, but the TIs will work if you ream the rockers for their shoulder...
I never use the stock studs, they threads rip right out of the nuts- They are too small even for a stock engine. When I did use them I believe we loctited them at 10 lb/ft.. |
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| Rhodes71/914 |
Nov 8 2004, 12:02 PM
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#13
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
I am about to put my 2.0 back together, should I put different rocker arm studs in?
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| Jake Raby |
Nov 8 2004, 12:43 PM
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#14
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Every engine can benefit from better studs. I have seen them snap with stock spring tension on a bus engine. Since that I have used nothing else but the H/D units..
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