The Ford Barn

corvette8n · 09-26-2019, 07:48 PM

I'm missing a few intake manifold bolts on a spare 1940 flathead, are they all the same length?, can I use hardware store replacements?, are they grade 5 or 8. Thanks

19Fordy · 09-27-2019, 07:30 AM

You can use hardware store replacements. Grade 5. Measure the depth of each missing hole and you can easily determine what length you need. You can saw longer bolts and make them shorter, if needed. I don't remember if all bolts are the same length but, I think they are.

Seth Swoboda · 09-27-2019, 08:05 AM

The correct bolts are "thick headed" in variety. if that does not matter to you just use the regular grade 5 bolts as 19Fordy says.

19Fordy · 09-27-2019, 08:22 AM

Just another thought. Don't over torque those bolts. 23-28 ft. lbs max.
Look here:
http://www.vanpeltsales.com/FH_web/f...ecs32-48V8.htm

deuce lover · 09-27-2019, 08:59 AM

Not all same length.

16, 3/8 X 16 2.25"
4, 3/8 X 16 1.25"
Don't forget the thin flat washers especially if intake is aluminum.

corvette8n · 09-27-2019, 09:30 AM

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Thanks guys intake is original '40's, I will print the page from Van Pelts and hang it on my garage wall.

deuce lover · 09-27-2019, 09:55 AM

Okay the ones on the extreme ends are the short ones.

09-26-2019, 07:48 PM	#1
corvette8n Senior Member Join Date: Jul 2010 Location: 36 miles north of Albany NY Posts: 2,946	Intake manifold bolt question I'm missing a few intake manifold bolts on a spare 1940 flathead, are they all the same length?, can I use hardware store replacements?, are they grade 5 or 8. Thanks

09-27-2019, 07:30 AM	#2
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,925	Re: Intake manifold bolt question You can use hardware store replacements. Grade 5. Measure the depth of each missing hole and you can easily determine what length you need. You can saw longer bolts and make them shorter, if needed. I don't remember if all bolts are the same length but, I think they are.

09-27-2019, 08:05 AM	#3
Seth Swoboda Senior Member Join Date: May 2010 Location: Southern Illinois Posts: 3,787	Re: Intake manifold bolt question The correct bolts are "thick headed" in variety. if that does not matter to you just use the regular grade 5 bolts as 19Fordy says.

09-27-2019, 08:22 AM	#4
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,925	Re: Intake manifold bolt question Just another thought. Don't over torque those bolts. 23-28 ft. lbs max. Look here: http://www.vanpeltsales.com/FH_web/f...ecs32-48V8.htm

09-27-2019, 08:59 AM	#5
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,301	Re: Intake manifold bolt question Not all same length. 16, 3/8 X 16 2.25" 4, 3/8 X 16 1.25" Don't forget the thin flat washers especially if intake is aluminum.

09-27-2019, 09:30 AM	#6
corvette8n Senior Member Join Date: Jul 2010 Location: 36 miles north of Albany NY Posts: 2,946	Re: Intake manifold bolt question Sponsored Links (Register now to hide all advertisements) Thanks guys intake is original '40's, I will print the page from Van Pelts and hang it on my garage wall.

09-27-2019, 09:55 AM	#7
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,301	Re: Intake manifold bolt question Okay the ones on the extreme ends are the short ones.