Engine Re-torquing intake manifold bolts question

91GTstroked

15 Year Member

Jun 14, 2007

503

282

93

Feb 22, 2025

#1

• Feb 22, 2025

• #1

Hope everyone is having a great weekend!

I'm thinking about trying to start the convertible up after I replaced the lower intake manifold gaskets, thermostat, water pump, fuel pressure regulator, reman injectors and all hoses.

My question is, after I get it running and get air out of the coolant system and change the oil. Can I re-torque the lower intake manifold bolts the following day? Or after a couple heat cycles?

Thanks

 

Attachments

• IMG_20250130_234521405_HDR.webp

  271 KB · Views: 102
• IMG_20250210_050844522.webp

  726.5 KB · Views: 81

Bullitt347

I have been doing it wrong this whole time

15 Year Member

Mar 23, 2007

3,960

2,920

194

Middle of Maine

Feb 22, 2025

#2

• Feb 22, 2025

• #2

Yes.
You will find that they are all "loose"
By loose, I mean that if they were torqued to 20 lb/ft you will find that they are at 16-18 lb/ft after everything has cooled off.
I have found this to be so even after the initial torque an hour later.
The gskt takes a set, the manifold settles.
I personally have never checked or re-torqued after running the engine.
Only re-torquing after an hour or two has passed.

 

Reactions: 91GTstroked

91GTstroked

15 Year Member

Jun 14, 2007

503

282

93

Feb 22, 2025

#3

• Feb 22, 2025

• #3

Bullitt347 said:

Yes.
You will find that they are all "loose"
By loose, I mean that if they were torqued to 20 lb/ft you will find that they are at 16-18 lb/ft after everything has cooled off.
I have found this to be so even after the initial torque an hour later.
The gskt takes a set, the manifold settles.
I personally have never checked or re-torqued after running the engine.
Only re-torquing after an hour or two has passed.

Click to expand...

I've always re-torqued. Just wondering if I can re-torque after a couple heat cycles. Car won't be driven, just running in my shop.

 

91GTstroked

15 Year Member

Jun 14, 2007

503

282

93

Feb 22, 2025

#4

• Feb 22, 2025

• #4

Well I started it. She fired right up and ran good. Now I'll drain the oil and pull the upper off tomorrow morning and re-torque lower intake manifold bolts. Then verify timing.


Sometimes I surprise myself.

 

Reactions: General karthief

limp

wrap a little cheese around it and its a done

5 Year Member

Oct 4, 2020

5,466

2,899

173

Florida

Feb 22, 2025

#5

• Feb 22, 2025

• #5

I retorqued mine the next day after the break in start.... They were all loose,,, Surprised me.. I used the ARP stud kit...

 

Last edited: Mar 2, 2025

Reactions: General karthief and 91GTstroked

AeroCoupe

lube between the nut and the face. I know my lubes

Founding Member

Oct 28, 2001

5,865

3,992

183

Claremore, OK

Feb 22, 2025

#6

• Feb 22, 2025

• #6

Gasket shrink. Does it every time and I always run studs on the intake. I retirees the ones on my 331 twice. Second time there was some movement but nothing serious.

 

Reactions: 91GTstroked and General karthief

J

Jarhead67

5 Year Member

Nov 24, 2018

171

64

38

Windsor Locks, Connecticut

Mar 1, 2025

#7

• Mar 1, 2025

• #7

91GTstroked said:

Hope everyone is having a great weekend!

I'm thinking about trying to start the convertible up after I replaced the lower intake manifold gaskets, thermostat, water pump, fuel pressure regulator, reman injectors and all hoses.

My question is, after I get it running and get air out of the coolant system and change the oil. Can I re-torque the lower intake manifold bolts the following day? Or after a couple heat cycles?

Thanks

Click to expand...

Yeah

 

Reactions: 91GTstroked