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914World.com _ 914World Garage _ bumper bolt strength
Posted by: 914lover17 Sep 20 2021, 06:14 PM
My bolts are in pretty bad shape, looks like they have been cut down from unoriginal longer bolts. Some aren't fitting, even with the bumper off. 
I am going to lightly tap the nuts and wanto get replacement bolts/rubber biscuit spacers.
Are the 8.8 class m8 x 40mm bolts from the hardware store good enough for temporary use while I order the correct 10.9 class ones? the ones inside it now are 9.8.
example of correct OEM:
https://www.justkampers.com/n0103404-m8-x-40mm-1-25-pitch-10-9-strength-bolt-various-uses.html
Temporary option:
https://www.homedepot.ca/product/paulin-m8-1-25-x-40mm-class-8-8-metric-hex-cap-screw-din-931-zinc-plated/1000135048
Posted by: 914Sixer Sep 20 2021, 06:52 PM
Factory bolts were 8.8 and plenty strong.
Posted by: mepstein Sep 20 2021, 07:28 PM
Some people use threaded studs to make hanging the bumper easier.
Posted by: bkrantz Sep 20 2021, 07:31 PM
Some people use threaded studs to make hanging the bumper easier.
But then they miss out on the fun of single-handed supporting a bumper in place while trying to get a bolt on each side started.
Posted by: mepstein Sep 20 2021, 07:37 PM
Some people use threaded studs to make hanging the bumper easier.
But then they miss out on the fun of single-handed supporting a bumper in place while trying to get a bolt on each side started.
Actually not to hard if you can find a large cardboard box to sit it on. Also works well for removing.
Posted by: windforfun Sep 20 2021, 08:39 PM
Some people use threaded studs to make hanging the bumper easier.
But then they miss out on the fun of single-handed supporting a bumper in place while trying to get a bolt on each side started.
Actually not to hard if you can find a large cardboard box to sit it on. Also works well for removing.
Call your neighbor. Those bolts pictured above should sue for severe abuse. I guess some folks need help.
Posted by: Rand Sep 20 2021, 08:49 PM
What bumpers? never mind, they will even hold the rbbbb
Posted by: 914e Sep 21 2021, 08:45 AM
These are not an 8.8 but Belmetric has 10.9 Flangehead bolts
https://www.belmetric.com/8mm-c-2_1208_1221/bfd8x40fylw-flange-bolt-109-yellow-zinc-full-p-7187.html
Posted by: Shivers Sep 21 2021, 09:59 AM
What bumpers? never mind, they will even hold the rbbbb
Just consider it a trim panel, you really don't want to bump it. 8.8's are fine
Posted by: 914sgofast2 Sep 21 2021, 10:09 AM
Threaded studs are the only way to go!
Posted by: 914lover17 Sep 21 2021, 12:00 PM
What bumpers? never mind, they will even hold the rbbbb
Just consider it a trim panel, you really don't want to bump it. 8.8's are fine
My bumpers fit pretty tight. I have to crank on the bolts pretty hard to bring them into the correct position. That's where my strength concern came in.
Posted by: Olympic 914 Sep 21 2021, 12:01 PM
Threaded studs are the only way to go!
At least for the top two.
I cut screwdriver slots in the studs, then switch them out for bolts after the bumpers are hung.
Posted by: 914lover17 Sep 21 2021, 12:25 PM
Threaded studs are the only way to go!
At least for the top two.
I cut screwdriver slots in the studs, then switch them out for bolts after the bumpers are hung.
thats a great idea, especially since they are temporary.
Posted by: 914lover17 Sep 27 2021, 10:07 PM
New bumper guards and improving your bumper fit is so so satisfying...
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