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In this article, I’m going to display you pictures of the fads you should follow as soon as torqueing particular parts top top the most popular little Block Chevy (327 and 350_ engines, 289, 302, and 351 Ford engines, and 318, 360, and also 5.7-liter hem Mopar engines.

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SBC intake Torque – 327 & 350

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" data-medium-file="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Intake-300x118.jpg" data-large-file="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Intake.jpg" loading="lazy" class="size-full wp-image-19138" src="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Intake.jpg" alt="Chevrolet" width="640" height="252" srcset="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Intake.jpg 640w, https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Intake-300x118.jpg 300w, https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Intake-638x252.jpg 638w" sizes="(max-width: 640px) 100vw, 640px" />ChevroletThe target vehicles I supplied for this lookup were a 1969 Camaro and also a 1971 Camaro. Input manifold bolts and head studs/bolts need to be torqued in a certain pattern and to a certain torque spec in stimulate for her engine to work-related properly. Entry manifold bolts top top SBC engines must be torqued come 30 lb-ft in a two-step sequence. An initial time around, collection your torque wrench come 20, follow the pattern, then repeat the sample (image above) again after setting the wrench come 30.

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" data-medium-file="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Head-300x142.jpg" data-large-file="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Head.jpg" loading="lazy" class="size-full wp-image-19139" src="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Head.jpg" alt="Chevrolet" width="640" height="303" srcset="https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Head.jpg 640w, https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Head-300x142.jpg 300w, https://www.ubraintv-jp.com/news/wp-content/uploads/2015/10/SBC-Head-638x303.jpg 638w" sizes="(max-width: 640px) 100vw, 640px" />ChevroletThe image over shows the torque pattern to be used when reinstalling the heads on any type of SBC engine. “The book” claims to monitor the sample twice, cutting the torque spec in half the very first time. I have actually gotten much better results by law it three times. I start at 30 lb-ft, then 60, followed by 90, except the left front (#12) which need to only it is in torqued to 85 lb-ft, as soon as working ~ above a 327. If I’m act a 350, the final spec is 60-70 and that should be damaged into three somewhat equal measures (20, 40, 65, because that example).

SBC Exhaust Manifolds

When you’re installing headers on any kind of SBC engine, these have the right to be a royal pain to torque, yet they’re no less important than head or input bolts. The sample is easy: inside out; or the facility bolts very first and then relocate forward and ago from there. I choose to jump earlier and forth-the two inside, the following outer two, and also then the outer two. Torqueing deserve to be done in a single pass, through the spec gift 20-25 lb-ft. I usually break-up the distinction to about 23. Also, if she installing stock manifolds, nothing forget to install the half-moon torque spreaders at the front.

SBC Crank main Caps and Rod Bolts

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Main bearing hat on 327 engines need to be torque in two procedures to between 60 and also 70 lb-ft, when 350 engines need to be required to 75. These space the cap on the crankshaft. Rod caps, or pole bearing caps, have to be torqued come 45 lb-ft for the 327 engine and also 35 because that the 350 engine.

Ford tiny Block Engines-the 289, 302, and also the 351

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Some sports of Ford’s 351 to be actually large block blocks with little block uppers and also some internals. These room usually pretty rarely to find, for this reason we’re only going to cover the little family of engines (289, 302, and also 351) that deserve to be uncovered in the vast bulk of Ford strip burners out there and also being built. The target auto I’m making use of in my lookup is a 1966 (289), 1968(302), and a1969 (351) Mustang. The photo over shows the speak sequence for 289 entry manifolds.

Intake Manifold talk Specs

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Refer to the photo above on the bottom for 302 engine intake manifolds, if the photo below illustrates the 351 entry manifold talk sequence. Together for the talk specifications, the 289 (above top) and 302 intakes room both torqued in 2 stages to between 20 and22 lb-ft. The 351 intake, on the other hand is torqued in 3 stages to between 23 and 25 lb-ft.

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Ford Head Bolt torque Sentences and also Specs

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The torque sequence because that all three Ford engines have the right to be viewed in the picture above. Again, the 289 and also 302 are two-stepped (I carry out three steps) to in between 65 and 72 lb-ft. The 351 develops much more compression and horsepower, so it needs an ext torque on the head bolts. These are three-stepped to in between 95 and 100 lb-ft.

Ford tiny Block Exhaust Manifolds.

Other 보다 from the within out, there are no talk specs I can find for any type of of the Ford engine exhaust manifolds. Several of the Ford-heads I know tell me that 20-25 lb-ft because that the 289 and 302 engines, and 30-35 because that the 351 is fine. They also mention that copper gaskets v high-temp exhaust spray gasket sealer have to be used.

Ford stick Bearing Caps and Main Bearing Caps

If you’re placing together one of two people a 289 or a 351, the stick bearing caps on this engines have to be torqued to between 40 and 45 lb-ft. Top top the other hand, you’re walking to have to be mindful with the rod caps on the 302 engine as they space only supposed to be torqued to in between 19 and also 24 lb-ft. The key bearings ~ above the 351 engine are torqued to in between 95 and 105 lb-ft-you’re walking to require a good angle and a great grip ~ above the talk wrench come hit that accurately. That should additionally be done in three steps. The various other two engines aren’t as beefy, therefore they only obtain torqued to in between 60 and also 70, with two steps.

Torque Specs and Bolt patterns for the Most well-known Mopar Engines

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Due to the absence of accessibility of true hem engines for all yet those v deep pockets, until newly the engines of selection for hot rod restorations and go fast projects because that Mopar enthusiasts have been the 318 and the 360, both of which are based ~ above the very same block. In ~ the past couple decades, Mopar has made newer Hemi engines much more affordable and thus an ext achievable for the rest of us.

Mopar intake Manifold Bolt Patterns and also Torque Specs

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When you’re rebuilding a 318 or 360 Mopar engine, you need to have a torque wrench that deserve to do both light and also heavy talk settings. When torqueing the entry manifold on these engines, you should two-step the torque, adhering to the bolt sample in the image above, come a best of 35 lb-ft. If she rebuilding a 5.7-liter hemi (Below), this is reduced to a solitary pass at nine lb-ft that torque.

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Head Bolts ~ above Mopar Engines

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Mopar engines of old to be favorites of traction racers for years because they generate gobs of low finish torque versus their competitors. This means their head bolts have to torqued much more than others. Following the bolt sample in the image above, you must three-step her head bolts to a final torque the 105 lb-ft through 318 and 360 engines.

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Hemi engines are fairly different. Mopar still specifies a three-step torqueing process, however they clues what talk to usage at every step, to add they rest it under by what head bolts space used. The very first step because that M12 head bolts is to 25 lb-ft, v the second step being to 40. After ~ that, rotate the bolt an additional 90 levels (1/4 turn). V M8 head bolts, the first to procedures are 15 and 25, respectively, with the last step also being a full 90 degrees.

Mopar Engine stick Bolts

When rebuilding the 316 engine pole bolt-rod bearing lid torque should be collection to between 45 and 50 lb-ft., This differs from 360 rod bolts that max out at 45. These must be done in 2 steps, doing both bolts/nuts to about 20 lb-ft an initial and climate doing both come the last torque. Hem engines (the 5.7 liter in ~ least) go to 21 lb-ft and then acquire a final twist that the bolt a complete 90 degrees.

Crankshaft main Bearing caps on Mopar Engines

This is one more instance where the 318 and 360 engines are torqued pretty strong while the hemi engines are very easy come over-torque. Main bearing cap on 318 engines should be torqued to between 85 and also 90 lb-ft., if 360 engines should be torqued come 85.

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The books also specify two different types (strengths) of main bearing cap bolts. They likewise specify a two-step speak procedure again, as well as a particular pattern to usage (Image above). M12 bolts space to torqued come 20 lb-ft and then turned a complete 90 degrees for final torque. Prior to the last 90 level torqueing turn, M8 bolts room torqued come 20 lb-ft.