 Impeller Housing Nuts, Torque Value? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| toadman |
 Jun 29 2015, 08:55 PM
Post
#1
|
|
Member  Group: Members Posts: 168 Joined: 26-December 05 From: Cincinnati, OH Member No.: 5,316  |
I am re-assembling my engine. I looked in my Haynes manual, tech specs booklet and factory service manual and could not find torque values for the four impeller housing nuts. Are there torque values for these nuts or do they just need to be snugged up?
Thanks for the help. |
   |
 
|
| Dave_Darling |
Jun 30 2015, 09:07 AM
Post
#2
|
|
914 Idiot Group: Members Posts: 14,981 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
|
About 9 lb-ft. There are standard torque values for various size fasteners, but since magnesium alloy is softer you have to use less.
Just snugged up is probably a reasonable approximation. --DD |
|
|
|
| toadman |
Jul 1 2015, 07:17 AM
Post
#3
|
|
Member Group: Members Posts: 168 Joined: 26-December 05 From: Cincinnati, OH Member No.: 5,316 |
Thanks, Dave.
I could not find a torque value for the cylinder head temp sensor either so I torqued it to 10 ft. lbs. This was before I read your post. Unless there is a published value somewhere that is much different than this, I think I will leave it alone. |
|
|
|
| 76-914 |
Jul 1 2015, 07:27 AM
Post
#4
|
|
Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,490 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
|
I copied this a few years ago. From our recently departed mentor:
"In general, 8mm bolts call for 14.7 ft/lbs, but 18-19 is OK. 10mm fasteners use about 35 ft/lbs, and 12mm use 56 or so. Do that and you'll be OK. The Cap'n" |
 |
|
| Dave_Darling |
Jul 1 2015, 08:40 AM
Post
#5
|
|
914 Idiot Group: Members Posts: 14,981 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
|
That's into steel. Into aluminum, you use about 75% of that value. Into magnesium, I don't know. So I took a guess at 66% or so.
--DD |
|
|
|
| stugray |
Jul 1 2015, 09:04 AM
Post
#6
|
|
Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
My rule of "finger" for fasteners of that size is to use a 1/4" ratchet and tighten with just thumb & one finger.
For torquing larger fasteners I go by: Snug < Grunt < Fart < Grunt+Fart Where Grunt+Fart =~ 90-100 Ft Lbs (wheel lug torque) (IMG:style_emoticons/default/biggrin.gif) |
|
|
|
| toadman |
Jul 1 2015, 11:54 AM
Post
#7
|
|
Member Group: Members Posts: 168 Joined: 26-December 05 From: Cincinnati, OH Member No.: 5,316 |
QUOTE(stugray @ Jul 1 2015, 07:04 AM)  My rule of "finger" for fasteners of that size is to use a 1/4" ratchet and tighten with just thumb & one finger. For torquing larger fasteners I go by: Snug < Grunt < Fart < Grunt+Fart Where Grunt+Fart =~ 90-100 Ft Lbs (wheel lug torque) (IMG:style_emoticons/default/biggrin.gif) As I get older I find that this method is unreliable. The farts and grunts come at lower levels than when I was a younger man. |
|
|
|
| dcecc1968 |
Jul 1 2015, 12:29 PM
Post
#8
|
|
Member Group: Members Posts: 251 Joined: 31-December 12 From: Concord, NC Member No.: 15,313 Region Association: South East States |
QUOTE(toadman @ Jul 1 2015, 01:54 PM) QUOTE(stugray @ Jul 1 2015, 07:04 AM) My rule of "finger" for fasteners of that size is to use a 1/4" ratchet and tighten with just thumb & one finger. For torquing larger fasteners I go by: Snug < Grunt < Fart < Grunt+Fart Where Grunt+Fart =~ 90-100 Ft Lbs (wheel lug torque) (IMG:style_emoticons/default/biggrin.gif) As I get older I find that this method is unreliable. The farts and grunts come at lower levels than when I was a younger man. Assuming you calibrated yourself at age 30, and say now you are 50, the new grunt+fart torque formula would be grunt + fart = (30/50) x (90 to 100 ft-lbs) = 54 to 60 ft-lbs |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 26th April 2024 - 07:24 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.