Torque settings? |
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Torque settings? |
Robson51 |
Feb 13 2020, 05:09 PM
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#1
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Member Group: Members Posts: 88 Joined: 18-November 19 From: seattle Member No.: 23,654 Region Association: Pacific Northwest |
I've used the search settings and also googled this question. Searching this site produced nothing and Google gives more than one answer.
What is the torque wrench setting for the intake manifold nuts? I have seen numbers from 4 (!) to 10 ft lbs. What is the torque setting for the rocker arms? Again, a couple different numbers but 14 ft lbs seems the middle. Any advice here? Thanks Rob |
914werke |
Feb 13 2020, 05:12 PM
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#2
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"I got blisters on me fingers" Group: Members Posts: 10,034 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
Because I hear this Q pretty often I posted a table with the most common torque values on my site in the file/downloads section (bottom of main page) HERE
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Robson51 |
Feb 13 2020, 05:16 PM
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#3
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Member Group: Members Posts: 88 Joined: 18-November 19 From: seattle Member No.: 23,654 Region Association: Pacific Northwest |
Because I hear this Q pretty often I posted a table with the most common torque values on my site in the file/downloads section (bottom of main page) HERE Intake manifold? Thanks-nice chart |
iankarr |
Feb 14 2020, 09:19 AM
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#4
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,472 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region |
The Haynes manual has a lot of torque values at the beginning of each section. For 8.8 grade M8, the standard torque is 17 ft-lbs.
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Mark Henry |
Feb 14 2020, 09:43 AM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
The Haynes manual has a lot of torque values at the beginning of each section. For 8.8 grade M8, the standard torque is 17 ft-lbs. (IMG:style_emoticons/default/agree.gif) |
Robson51 |
Feb 14 2020, 10:45 AM
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#6
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Member Group: Members Posts: 88 Joined: 18-November 19 From: seattle Member No.: 23,654 Region Association: Pacific Northwest |
The Haynes manual has a lot of torque values at the beginning of each section. For 8.8 grade M8, the standard torque is 17 ft-lbs. I would think the intake manifold nuts were in that range, but Haynes calls out for 4.35 ft lbs. I've never seen that low of a setting on such a big bolt and can't figure out the logic behind it. Is it a typo? Can someone explain why it would be so low? |
Tbrown4x4 |
Feb 14 2020, 11:03 AM
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#7
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Senior Member Group: Members Posts: 703 Joined: 13-May 14 From: Port Orchard, WA Member No.: 17,338 Region Association: None |
Possibly because of the phenolic spacer between the head and the manifold? I can't remember what I torqued my carb manifolds to, but both Clymer manuals I just checked had nothing for the intake. Not even under "Fuel Injection".
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rhodyguy |
Feb 14 2020, 11:04 AM
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#8
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,071 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Value is based on the stud size. Not the nut.
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Robson51 |
Feb 14 2020, 11:16 AM
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#9
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Member Group: Members Posts: 88 Joined: 18-November 19 From: seattle Member No.: 23,654 Region Association: Pacific Northwest |
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stephenf |
Jan 18 2021, 06:44 PM
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#10
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Newbie Group: Members Posts: 11 Joined: 17-February 07 From: california Member No.: 7,544 |
Value is based on the stud size. Not the nut. I get that, but again-why 4 ft lbs on an 8MM stud? its not the stud the low torque is protecting, but its the gasket material......and since i am doing just that install.....thanks for asking. |
ClayPerrine |
Jan 19 2021, 07:38 AM
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#11
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Life's been good to me so far..... Group: Admin Posts: 15,429 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Value is based on the stud size. Not the nut. I get that, but again-why 4 ft lbs on an 8MM stud? Torque settings for air cooled motors are much lower than their water cooled counterparts because air cooled motors grow when they get hot. So the torque on all the bolts go up as the engine warms. 4ft lbs is probably enough on the intake bolts. They are not structural, and the engineers don't want to crush the gasket when the engine is fully warm. |
Jake Raby |
Jan 19 2021, 07:50 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 |
I torque intake nuts to 15#. 4# is no where near enough, unless you want a vacuum leak.
For 7mm (stock) rocker arm studs I go 12#, but I only use the HD 8mm units on my engines, and torque them to 18#. |
krazykonrad |
Jan 19 2021, 10:27 AM
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#13
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Senior Member Group: Members Posts: 1,124 Joined: 21-February 06 From: Canton, GA Member No.: 5,610 |
Because I hear this Q pretty often I posted a table with the most common torque values on my site in the file/downloads section (bottom of main page) HERE Thanks for posting this. This will be a huge help. Konrad |
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