Child in Typ3 - Safety seat and belts

[Ralfik]

Hello!
As I’m currently renovate the rear trunk metal sheets and floorpans, this may be a good moment to think about installation of isofix holders for my kid’s safety seat. I also wonder how to deal with ininertial seat belts.

Do you have any advises how to handle it?

Rafal

[Tvättbjörn]

Depending in what country you are in. You better have that kind of work signed off by the MOT / TUV engineer or automobile safety department.

Since that part will have to hold up in case of an accident it has to be done correctly. That is why car manufacture do a lot of testing and reinforcement in those areas.

[Mike Fisher]

Most of us post our Location in our signature, so we can better advise each other.
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[Bobnotch]

[ataraxia]

[Qldelsie]

He is in Poland I believe ?
Depends on the year of your car. My 1970 Fastback had mounting bolts for lap sash belts for the rear seat in both the C pillars and below the seat base. For child seats, I also bolted the correct fittings through the metal of the rear parcel shelf, with reinforcement underneath.
As already said, rules depend on your country, so best to check with local requirements.

[ALLWAGONS]

You can always go old school

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[ataraxia]

I highly doubt any kid tethered to the back seat with one of those survived a collision.

[Qldelsie]

[ataraxia]

[JJM86]

I've used both an infant car seat with the base that stays in the car as well as a toddler "convertible" seat that works rear facing or forward facing in my '71 Squareback. I found that the receptacles on the stock lap belts in my car were too long to tighten down properly on either seat, so I installed my own version of the LATCH/ISOFIX system to use the builtin straps on the seats.

Basically, I used plates from some 3-point retractable belts that I got for the front seats along with some parts from old belts to position two "loops" right at the right spot in the middle of the back seat to hook the car seat straps to. This system is bolted directly to the factory seat belt mount points and seems pretty damn sturdy. I can also get the car seat strapped in there correctly.

Currently, the seat is installed in the rear-facing position, so I'm not using the top anchor in the same way as a forward facing seat. I'll cross that bridge when I get to it but will probably figure up some anchor point in the rear cargo area to use.

Photos of my installation below.
Seat in place. I'm using the rear strap hooked onto the front seatbelt receptacle just to keep the seet from flopping too much.

Hooks for the LATCH belt.

View of the hooks with the seat bottom up.

Clsoer view of the mounts I put together. Use grade 8 or stronger hardware (12 in metric?)

And on 3-point retractable belts in general- I bought some for use in the front and would advise against getting low cost ones. In short, the ones I bought (for like $130?) broke and I decided they were a poor design that wouldn't be very safe after I investigated the failure. Stock belts are back in until I find something better from a junkyard car or something.

[ataraxia]

That's a decent solution with off the shelf parts.

Thanks for sharing.