Need Torque Specs for Intake Manifold on Chevy 350

Maintenance and Repairs
1

I’m working on a Chevy 350 engine and I need to get the right torque specifications for the intake manifold. I’ve done some reading, but there are a few inconsistencies out there, and I want to ensure I’m following the correct procedure to avoid any issues. Here’s what I’m looking for:

Specifics I’m After:

  • Torque Specs: What’s the correct torque range in ft-lbs for the intake manifold bolts?
  • Sequence: Is there a recommended sequence for tightening the bolts to prevent warping or leaks?
  • Gasket Information: Should I use any specific type of gasket or is a standard one good enough?
  • Any Other Tips: If anyone has additional tips on working with the intake manifold or any common pitfalls to watch out for, I’d love to hear them!

Background:

I’ve been doing some DIY projects on my vehicle, and this time I’m focusing on tuning the performance of the engine. I want it to run as smoothly as possible, and I believe the intake manifold is a key part of that.

I appreciate any help you can provide—thanks in advance for your insights!

2

Hey! For the Chevy 350 intake manifold, the typical torque spec is around 35-45 ft-lbs. Make sure to follow the right sequence for a proper seal!

6 Likes
3

Great info! That range really helps. Is there a specific sequence you recommend for tightening?

4

The usual sequence is to start in the middle and work your way outwards in a crisscross pattern. It ensures even distribution of pressure!

5

That’s correct! I always do it that way. And don’t forget to use a torque wrench for accuracy. It’s easy to underestimate!

6

Thanks! Is there a specific torque wrench you would recommend? I need to buy one.

7

I use a digital torque wrench; they’re super easy to read and often more accurate. Just make sure it can measure up to 65 ft-lbs for your needs!

3 Likes
8

I’ve heard some guys still swear by beam-style torque wrenches. Any thoughts on that? Are they really reliable?

9

I find them less user-friendly, to be honest. Digital wrenches give you a clear readout, which is great in tight spaces like the 350’s manifold area.

10

I guess that’s a fair point! Is there a specific model you all use? I’m looking for good recommendations.

11

I recently purchased the DEWALT digital torque wrench, and it’s been fantastic! Highly recommended. Just the right price too!

12

Funny story: last time I used my old beam wrench, I over-torqued and had to redo everything. Lesson learned—and a ton of extra work!

13

Oof! That sounds like a nightmare. Definitely worth investing in a good tool to avoid that!

4 Likes
14

Always great to learn from someone else’s mistakes! Let’s make sure we get it right this time. I’m definitely bookmarking this thread for future reference!

15

Hey there! For the Chevy 350 intake manifold, the torque specs are generally around 35-45 ft-lbs. Make sure to follow a proper sequence when tightening to avoid misalignment.

1 Like
16

Thanks for the specs! What issues have you faced during your installation? I’m worried about gasket leaks.

17

Gasket leaks are often due to improper sealing or old gaskets. Always use new ones and consider applying some RTV sealant to the corners for extra security!

18

Great point! I was thinking about reusing old ones. Should I really avoid that?

19

Definitely avoid reusing old gaskets! They can lead to leaks and a whole lot of trouble later. It’s better to spend a little extra now than to deal with potential problems.

20

Misalignment can be tricky. Ensure that all surfaces are clean and flat before installation. Have you checked the mating surfaces for any warping?

5 Likes