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Add SeatBelt in old car?

Started by Ramses, August 03, 2025, 12:39:51 PM

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Ramses

As many of you have already seen, there is a video around 'till few year where you see a 1962 Cadillac crash in a 2002 cadillac... ( Link HERE )

I have a 1962 cadillac 4 doors, (exactly like the one on this video!) and i actually drive it without seatbelt.

My question is: What do you think about adding seatbelt in old car? Maybe peoples prefer add seatbelt to get more security, or maybe they think that they prefer dont add it to preserve the car as original as possible?

Let me know what you think about adding seatbelt in your old car!
... To see my actual project: http://cadillac1962.com/

Big Fins

I put them in my '59.

I think it was in 1960, the manufacturers started putting dimples in the floor pans where the seatbelts should go if added. I don't know if the floorpan was reinforced to allow the seatbelts to be put in properly or not. I used 3" X 3" X 3/16" steel plates backing up the washers on the exterior side of the floor pans.
Current:
1976 Eldorado Convertible in Crystal Blue Fire Mist with white interior and top. (Misty Blue)

Past and much missed:
1977 Brougham de Elegance
1976 Eldorado Convertible
1972 Fleetwood Brougham
1971 Sedan de Ville
1970 de Ville Convertible
1969 Fleetwood Brougham
1969 Sedan de Ville
1959 Sedan deVille

Clewisiii

It will not help in serious crashes. But it may help in lower speed crashes. Or just holding you in place during hard breaking or turns. Especially passengers. The driver knows when they hard break and extend legs and tense. Others in the vehicle do not have that luxury. So they would go flying. My car only had one belt installed. Passenger front.
"My interest is in the future, because I am going to spend the rest of my life there."  Charles Kettering

Big Fins

I thought that hard right turns and a bench seat went hand in hand when your babe is with you!
Current:
1976 Eldorado Convertible in Crystal Blue Fire Mist with white interior and top. (Misty Blue)

Past and much missed:
1977 Brougham de Elegance
1976 Eldorado Convertible
1972 Fleetwood Brougham
1971 Sedan de Ville
1970 de Ville Convertible
1969 Fleetwood Brougham
1969 Sedan de Ville
1959 Sedan deVille

Clewisiii

Quote from: Big Fins on August 03, 2025, 01:00:40 PMI thought that hard right turns and a bench seat went hand in hand when your babe is with you!

My drivers training instructor said, "Or if she didnt slide over when you put your arm over her shoulder, just reach a little farther unlatch the door and make a hard left."

And he said that in 2000
"My interest is in the future, because I am going to spend the rest of my life there."  Charles Kettering

David Greenburg

There are certain scenarios where you might be better off without a lap belt in an old car, and in some cases, a lap belt (as opposed to lap and shoulder belts) but IMHO, those are outweighed by the potential for serious injury or worse if you are ejected from the car. One of my cars had belts when I got it, and I've added front belts to the other. Like Big Fins, I beefed up the mountings with steel plates on both cars, which I would highly recommend for any car built prior to the introduction of the federal motor vehicle safety standard for seat belts. Seat belt mounting (or seat mounting for that matter) was not a priority for manufacturers. If you've taken the front seat out of a late 50's-early 60's Cadillac, you've seen how small the mounting bolts are.
David Greenburg
'60 Eldorado Seville
'61 Fleetwood Sixty Special

Jay Friedman

Shortly after I bought my '49 in 1984 I had 4 sets of seat belts installed: 2 in front, 2 in back.  They drilled through the floorboards and through frame members, then fastened the bolts holding the seat belts with wide washers. I would install shoulder belts but my car is a 2 door coupe and the pillar behind the front door isn't wide enough. 
1949 Cadillac 6107 Club Coupe
1932 Ford V8 Phaeton (restored, not a rod).  Sold
Decatur, Georgia
CLC # 3210, since 1984
"If it won't work, get a bigger hammer."

The Tassie Devil(le)

I always advise on fitting seat belts into any car, so long as the structure of the vehicle is not compromised.   I can attest to the safety of seat belts as I fitted a drivers lap/sash belt to my 1952 Renault 750, 3 hours before I wrapped it around a big gum tree on a dirt road back in 1965.   It saved me.

Basic lap Belts are better than no belts, but Lap/Sash belts are the best way of protecting your loved ones in the event of a crash.   

The Sash part keeps the driver from impaling on the Steering Weel, and the passengers from face-planting the dash or the rear of the front seat.

The main problem with an early 2 door car is that the heavy front seat backs are free to fly forward, pinning the driver/passenger from behind.

With our cars, there are many things to consider prior to fitting belts, and one of these is creating a slot in the seat base for the lap part of the inner belt to pass through the seat base to the floor in a straight line.   Looping it under the seat back and over the back of the seat base creates excessive free length of webbing that will stretch when compromised.   If you look at cars with seat belts, there is a slot for this.

Pictured is the slot and upholstery modifications I made to a 1969 SDV to protect the webbing.   The seats had been recovered with no provision for the seat belt, so I had to be constructive.   I think the factory sleeve was probably plastic.

The third is the belt routing in a 1955 Buick Coupe without the hole, and the last one is a 1960 CDV seat showing the obstacle of the seat base.

Bruce. >:D 
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Ramses

Quote from: Clewisiii on August 03, 2025, 01:04:32 PMMy drivers training instructor said, "Or if she didnt slide over when you put your arm over her shoulder, just reach a little farther unlatch the door and make a hard left."

And he said that in 2000

Lol!! Very cool idea!  ;D
... To see my actual project: http://cadillac1962.com/

TonyZappone #2624

My mechanic when I was in Western New York installed color compatible seat belts both in my '47 and '58 convertible coupes.  I don't know how he mounted them, but they are both rust free cars, and I assume they were just mounted to the floor sheet metal
Tony Zappone, #2624
1936 Pierce-Arrow conv sed
1947 Cadillac Conv cpe
1958 Cadillac conv
2025 Chrysler Pacifica Pinnacle
2016 Cadillac CT6 Platinum

The Tassie Devil(le)

I forgot to mention that I have fitted Retractable Lap/Sash seat belts to the front and rear outboard seating positions to my '72 Eldorado Convertible, and that has no roof to mount the Shoulder Belt Anchor points.

Bruce. >:D
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Jeff Rosansky CLC #28373

We put them in our 55. Put the anchor point in the B pillar.
I know it wont help much if anything really happens, but should help in a minor event and keep us in the car if we roll or the doors pop open.
Jeff Rose
CLC #28373
1970 Coupe DeVille (Big Red)
1955 Series 62 (Baby Blue)
Dad's new 1979 Coupe DeVille

71 Fleetwood

I've always added lap belts but haven't tried three point. 
1971 Fleetwood Sixty Special Brougham

Art Director

My 1963 Six-Window Sedan de Ville came new with two lap belts in the front. After my grandmother passed and I inherited the car in 1993, I bought four pairs of belts from a 1963 at a salvage yard and had Ssnake-Oyl reweb them using the correct color. Took out the bottom of the rear seat and found seat belt mounts in the chassis. Now I have six lap belts...the two originals were moved to the middle.
Tim Coy
CLC Southwestern Regions Vice President
Art Director, The Self-Starter, International Membership Directory
Life member, Rocky Mountain Region
CLCMRC Benefactor #102

1963 Six-Window Sedan de Ville
1972 Fleetwood Brougham - RIP
1988 Sedan de Ville - RIP
2001 Eldorado ESC - RIP
2003 DeVille DTS - sold

The Tassie Devil(le)

G'day Tim,

What alterations to the front seat bases did the Factory do to allow the seat belts to pass from the wearer to the floor?   Was it a straight line? or a "S" shaped configuration?

Bruce. >:D
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Jim Miller

My 41 and 49 have front lap belts added. I'd like to add front lap belts to my 57, but the way the seat is upholstered there's no way the run the belt between the base and back.
Jim Miller

1941 6219
1949 6237X
1957 62 Sedan
1970 CDV
2025 XT6
Past:
1991 SDV
1999 DeElegence
2006 DTS
2013 XTS
2016 SRX
2021 XT6

The Tassie Devil(le)

Quote from: Jim Miller on August 06, 2025, 08:53:54 PMMy 41 and 49 have front lap belts added. I'd like to add front lap belts to my 57, but the way the seat is upholstered there's no way the run the belt between the base and back.
This is the hard part.   You have to create a hole/slot in trhe seat base to allow the belt webbing to go through.

BUT, in most cases, you will have to modify the springs to allow the webbing to pass through there and not get tangled up in the metal.   Plus, de-burr any sharp metal of the seat frame.

Then, create a sleeve to protect the webbing as well.

Look at any newer seats with the factory belts, and this will show you what I am talking about.   This is shown in Post No. 7.

Pictured is what Cadillac did for 1972 in the Eldorado 60/40 Seat.

Bruce. >:D
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Art Director

Quote from: The Tassie Devil(le) on August 06, 2025, 08:23:15 PMG'day Tim,

What alterations to the front seat bases did the Factory do to allow the seat belts to pass from the wearer to the floor?  Was it a straight line? or a "S" shaped configuration?

Bruce. >:D
Hi Bruce,

Straight line. I believe the belts were installed at the dealership, but they have Cadillac tags on them from the supplier.
Tim Coy
CLC Southwestern Regions Vice President
Art Director, The Self-Starter, International Membership Directory
Life member, Rocky Mountain Region
CLCMRC Benefactor #102

1963 Six-Window Sedan de Ville
1972 Fleetwood Brougham - RIP
1988 Sedan de Ville - RIP
2001 Eldorado ESC - RIP
2003 DeVille DTS - sold

Clewisiii

Quote from: Art Director on August 06, 2025, 03:27:09 PMMy 1963 Six-Window Sedan de Ville came new with two lap belts in the front. After my grandmother passed and I inherited the car in 1993, I bought four pairs of belts from a 1963 at a salvage yard and had Ssnake-Oyl reweb them using the correct color. Took out the bottom of the rear seat and found seat belt mounts in the chassis. Now I have six lap belts...the two originals were moved to the middle.

What was your experience with Ssnake Oyl like. I plan on having them rebuild my belts. I will need them to do my chrome to. My belts currently feel very soft. But most later belts have a very stiff webbing. Not sure which types they have for replacement.
"My interest is in the future, because I am going to spend the rest of my life there."  Charles Kettering