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In this article, I’m going to display you pictures of the trends you have to follow once torqueing particular parts ~ above the most popular tiny Block Chevy (327 and 350_ engines, 289, 302, and 351 Ford engines, and also 318, 360, and 5.7-liter hemi Mopar engines.

You are watching: Chevy 350 intake manifold torque sequence

SBC entry Torque – 327 & 350

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" data-medium-file="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Intake-300x118.jpg" data-large-file="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Intake.jpg" loading="lazy" class="size-full wp-image-19138" src="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Intake.jpg" alt="Chevrolet" width="640" height="252" srcset="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Intake.jpg 640w, https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Intake-300x118.jpg 300w, https://www.sdrta.net/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 to be a 1969 Camaro and a 1971 Camaro. Entry manifold bolts and also head studs/bolts need to be torqued in a particular pattern and to a particular torque spec in stimulate for your engine to work-related properly. Entry manifold bolts ~ above SBC engines should be torqued to 30 lb-ft in a two-step sequence. An initial time around, collection your torque wrench to 20, monitor the pattern, then repeat the pattern (image above) again after setting the wrench to 30.

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" data-medium-file="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Head-300x142.jpg" data-large-file="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Head.jpg" loading="lazy" class="size-full wp-image-19139" src="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Head.jpg" alt="Chevrolet" width="640" height="303" srcset="https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Head.jpg 640w, https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Head-300x142.jpg 300w, https://www.sdrta.net/news/wp-content/uploads/2015/10/SBC-Head-638x303.jpg 638w" sizes="(max-width: 640px) 100vw, 640px" />ChevroletThe image over shows the torque sample to be provided when reinstalling the heads on any type of SBC engine. “The book” says to monitor the pattern twice, cut the speak spec in fifty percent the very first time. I have actually gotten much better results by act it three times. I begin at 30 lb-ft, climate 60, complied with by 90, other than the left prior (#12) which have to only it is in torqued come 85 lb-ft, once working top top a 327. If I’m act a 350, the last spec is 60-70 and also that should be broken into three somewhat equal procedures (20, 40, 65, because that example).

SBC Exhaust Manifolds

When you’re installation headers on any SBC engine, these deserve to be a royal pain to torque, yet they’re no less crucial than head or entry bolts. The pattern is easy: inside out; or the center bolts first and then move forward and earlier from there. I prefer to jump back and forth-the two inside, the next outer two, and also then the outer two. Torqueing can be excellent in a single pass, with the spec gift 20-25 lb-ft. I usually separation the difference to about 23. Also, if she installing stock manifolds, don’t forget to download the half-moon speak spreaders at the front.

SBC Crank main Caps and Rod Bolts

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Main bearing hat on 327 engines should be talk in two steps to between 60 and 70 lb-ft, when 350 engines need to be taken to 75. These are the caps on the crankshaft. Stick caps, or pole bearing caps, should 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 sport of Ford’s 351 to be actually huge block blocks with little block uppers and also some internals. These are usually pretty rarely to find, for this reason we’re just going to cover the little family of engines (289, 302, and 351) that have the right to be found in the vast majority of Ford piece burners out there and being built. The target vehicle I’m using in my lookup is a 1966 (289), 1968(302), and also a1969 (351) Mustang. The photo above shows the torque sequence for 289 input manifolds.

Intake Manifold talk Specs

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

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Ford Head Bolt talk Sentences and Specs

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The speak sequence for all three Ford engines have the right to be viewed in the photograph above. Again, the 289 and 302 are two-stepped (I perform three steps) to in between 65 and 72 lb-ft. The 351 develops more compression and horsepower, so the needs more torque on the head bolts. These are three-stepped to in between 95 and 100 lb-ft.

Ford little Block Exhaust Manifolds.

Other than from the within out, there room no torque specs I might find for any of the Ford engine exhaust manifolds. Some of the Ford-heads I recognize tell me that 20-25 lb-ft because that the 289 and also 302 engines, and also 30-35 for the 351 is fine. They likewise mention that copper gaskets with high-temp exhaust spray gasket sealer have to be used.

Ford stick Bearing Caps and Main Bearing Caps

If you’re putting together either a 289 or a 351, the pole bearing caps on these engines should be torqued to between 40 and also 45 lb-ft. ~ above the other hand, you’re walk to have to be mindful with the rod caps on the 302 engine as they room only an alleged to be torqued to in between 19 and 24 lb-ft. The key bearings on the 351 engine are torqued to between 95 and also 105 lb-ft-you’re walk to need a good angle as well as a good grip ~ above the speak wrench come hit that accurately. That should additionally be done in 3 steps. The various other two engines aren’t together beefy, so they only acquire torqued to between 60 and also 70, with two steps.

Torque Specs and also Bolt trends for the Most renowned Mopar Engines

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Due come the lack of accessibility of true hemi engines because that all however those with deep pockets, until recently the engines of choice for hot rod restorations and also go fast projects because that Mopar enthusiasts have been the 318 and the 360, both the which are based ~ above the same block. Within the past couple decades, Mopar has actually made newer Hemi engines much more affordable and also thus an ext achievable because that the remainder of us.

Mopar entry Manifold Bolt Patterns and Torque Specs

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When you rebuilding a 318 or 360 Mopar engine, you require to have a torque wrench that have the right to do both light and heavy torque settings. When torqueing the intake manifold on this engines, you need to two-step the torque, complying with the bolt pattern in the photo above, come a maximum of 35 lb-ft. If you rebuilding a 5.7-liter hem (Below), this is reduced to a solitary pass at nine lb-ft of torque.

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Head Bolts top top Mopar Engines

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Mopar engines the old were favorites of traction racers for years due to the fact that they generate gobs the low finish torque versus your competitors. This way their head bolts should torqued an ext than others. Complying with the bolt pattern in the picture above, you have to three-step her head bolts come a final torque of 105 lb-ft v 318 and also 360 engines.

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Hemi engines are fairly different. Mopar still specifies a three-step torqueing process, however they point out what speak to usage at every step, to add they rest it under by what head bolts are used. The an initial step for M12 head bolts is come 25 lb-ft, through the 2nd step being to 40. ~ that, revolve the bolt an additional 90 levels (1/4 turn). With M8 head bolts, the very first to steps are 15 and 25, respectively, through the final step also being a complete 90 degrees.

Mopar Engine pole Bolts

When rebuilding the 316 engine stick bolt-rod bearing cap torque have to be set to between 45 and 50 lb-ft., This differs from 360 rod bolts the max the end at 45. These have to be done in two steps, law both bolts/nuts to roughly 20 lb-ft first and then doing both come the final torque. Hem engines (the 5.7 liter in ~ least) walk to 21 lb-ft and then obtain a final twist the the bolt a full 90 degrees.

Crankshaft key Bearing hat on Mopar Engines

This is another instance whereby the 318 and 360 engines space torqued pretty strong while the hem engines are really easy to over-torque. Main bearing hat on 318 engines must be torqued to between 85 and also 90 lb-ft., if 360 engines need to be torqued to 85.

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The books also specify 2 different varieties (strengths) of key bearing cap bolts. They additionally specify a two-step talk procedure again, and also a specific pattern to usage (Image above). M12 bolts room to torqued to 20 lb-ft and then turned a full 90 degrees for last torque. Before the last 90 level torqueing turn, M8 bolts room torqued come 20 lb-ft.