Self tappers into plastic

[Marquezs Stabilisers]

I have a 2004 Impreza WRX Blobeye and for a lot of jobs I've done recently, I've had to take the radio out. This involves self tappers going into plastic mounts, and inevitably 20 years after it left the factory in Japan, some of the holes are a bit too big for the screws to bite.

If this was a woodwork project, I'd bung in some wood glue and toothpicks, wait for it to set, then crack on.

But how do you do this with plastic? (Assuming that I don't just buy bigger screws).

[E-bmw]

You either buy bigger screws or fit spire nuts to where the holes are.

[steveo3002]

or a smear of 2 part epoxy around the hole to give it something to bite on

[Dogwatch]

Or soda bicarbonate and superglue

https://www.youtube.com/watch?v=eP3xJIJ-TbU

[Thats What She Said]

or a cable tie and soldering iron to build the hole back up.

[TwinKam]

Fill hole with 'hotglue', then drill a pilot hole.

[AW111]

TwinKam said:

Fill hole with 'hotglue', then drill a pilot hole.

Careful with that.

I used hot-melt glue to repair some of the dash on my MR2.
Unfortunately, when parked in 45 degree Melbourne summer heat, the (black) dash got hot enough for the glue to re-melt.

I only found out when I had to remove the dash top some time later, and it was a monumental effort, as the glue had melted, run, and solidified sticking sundry parts together.

[TwinKam]

AW111 said:

TwinKam said:

Fill hole with 'hotglue', then drill a pilot hole.

Careful with that.

I used hot-melt glue to repair some of the dash on my MR2.
Unfortunately, when parked in 45 degree Melbourne summer heat, the (black) dash got hot enough for the glue to re-melt.

I only found out when I had to remove the dash top some time later, and it was a monumental effort, as the glue had melted, run, and solidified sticking sundry parts together.

I post from the old country... what's 45°?

[Sheepshanks]

AW111 said:

Careful with that.

I used hot-melt glue to repair some of the dash on my MR2.
Unfortunately, when parked in 45 degree Melbourne summer heat, the (black) dash got hot enough for the glue to re-melt.

I only found out when I had to remove the dash top some time later, and it was a monumental effort, as the glue had melted, run, and solidified sticking sundry parts together.

You could have chosen a hot day to do the job!

[AW111]

TwinKam said:

AW111 said:

TwinKam said:

Fill hole with 'hotglue', then drill a pilot hole.

Careful with that.

I used hot-melt glue to repair some of the dash on my MR2.
Unfortunately, when parked in 45 degree Melbourne summer heat, the (black) dash got hot enough for the glue to re-melt.

I only found out when I had to remove the dash top some time later, and it was a monumental effort, as the glue had melted, run, and solidified sticking sundry parts together.

I post from the old country... what's 45°?

Half a right angle?

[Marquezs Stabilisers]

Thanks everyone, I live in Glasgow so not too comparable with Melbourne (the Philip Island MotoGP notwithstanding!)

Few options to consider here.