924Board.org

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

WTF am I on about you may well ask.

See if you have CSI potential by examining the clues:

See how a fool fitting a child restraint can cause unexpected problems. Kid was probably safer rolling around on the floor than safely sitting on top a 60L molotov cocktail.

Had replaced the leaking filler hose years ago, along with what I could access with the tank installed. However on some rare occasions could still smell a distinct odour. Trannys out so good time to drop the tank & replace all the small rubber hoses. Could see a blob of $hit with a fuel stain surrounding it. Scraped it off to reveal a 1/4" hole. Have read about the stress cracks affecting these tanks. First thought was someone had drilled it out to relieve the stress but was sus about it being in the centre of a rib. This F up was likely the PPO`s handiwork when the car was half its age, or younger.

DONT USE LONG BOLTS TO FIT KIDDIE SEATS.

Big Birko helped fix the problem by sweat soldering a plate over the hole and melting more solder on top for reinforcement.

Moral of this story:
If you are an idiot make sure to use contraception. Benefits the human gene pool too.

And think before screwing down a sub there too:

http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/251194-gas-fumes-tank-leaks-read.html

Fixed the pic link.

9XX Girl! · Posted: Tue Jun 08, 2010 5:16 am Post subject:

Hmmm..... Thanks for the posting RC. Very interesting. I was thinking of fitting a car seat for my 3 year old grandson. I will make sure i don't puncture the tank.

On the subject of kids car seats, has anyone fitted one (without making holes). I could fit rear seat belts and then try get a kids seat that will fit in one of the rear seats and then hook it all up with a standard seat belt. The irony of it is that the rear seats are more like child seats than adult seats but UK law states i must fit a child seat for carrying an infant.

_________________
924 (84) N/A 2 ltr - 5 Speed - BLACK - Project (looking for 200BHP, any ideas!)
924 (81) N/A 2 ltr - 3 Speed Auto - SURINAM RED (Metallic) - Near Original Spec (sticking with originality)
BOTH ON THE ROAD, BOTH USED EVERY-OTHER DAY

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

The 2 holes with threaded bosses are already there, in my 77 anyway. Lift the carpet up and see. Boss is about 10 - 12mm high so check theres no more than that of thread. Havent measured but looks like bugger all clearance between them and top of tank.

The rear seats are "cute" and great for restraining kids. My boy liked them till he got too big and his head touched the roof. The belts are only a single lap though. No idea of the laws there but probably more of a nanny state than here. We are fast catching up though. * Maybe a booster (foam) seat? Prety silly IMO raising a child up higher, more chance of an injury. New laws here have children in the back, facing rearward. They`re gona love that, not.

* GP drivers opinion on our pussy "hoon" laws. Call a little squeal a burnout, what BS. Bet if Lewis Hamilton knew he would be booked for a burnout he could have revved the Merc up more and disappeared in a cloud of smoke. That would be more newsworthy.

http://www.theage.com.au/sport/australian-grand-prix/officials-f1-guns-collide-over-nanny-state-road-rules-20100328-r4qj.html

9XX Girl! · Posted: Tue Jun 08, 2010 6:17 am Post subject:

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

I have known there was a hole under the carpet since the day I came out of it.

_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

Err ...., bosses with threaded holes are in the boot space, just behind the seat, approximately in line with centre of wheel arch. Where the screwdriver is. Sure they are factory, can see the imprint of the square flange under the black-jack. Go on Paula, lift the carpet up. Its like putting your hand down the crack in a strange couch, never know what you`ll find there.

9XX Girl! · Posted: Tue Jun 08, 2010 7:45 am Post subject:

Hmmm... i will have a look tomorrow. Remember RC, Its 10:50pm here, raining and dark as you like so... i won't be lifting the carpet tonight. Plus, I have had the carpet up recently. I fitted a Bosch "Blue Spot" 10 disk multi-changer. Didn't drill any holes though, well only into the rear of the seat (it appears to be wood)

_________________
924 (84) N/A 2 ltr - 5 Speed - BLACK - Project (looking for 200BHP, any ideas!)
924 (81) N/A 2 ltr - 3 Speed Auto - SURINAM RED (Metallic) - Near Original Spec (sticking with originality)
BOTH ON THE ROAD, BOTH USED EVERY-OTHER DAY

931Owner · Joined: 14 Feb 2009 Posts: 352 Location: Chicago NW Suburbs

I used a 2 pot gas tank hole filler which I picked up at AutoZone to patch some rust holes on the F150 gas tank. Salt and grime accumulation caused rust where the steel straps rub against the tank.
They were very decent size rust holes and there were quite a few of them. Big enough for 11 gallons to seep out over a few days. I couldn't tell why I was using so much gas.
It's been at least 3 years now and its held up quite well. A very handy and cheap fix especially if you don't have access to a Mr big Birko soldering iron.
_________________
1980 Turbo
-too many cars and too many motobikes

9XX Girl! · Posted: Thu Jun 10, 2010 5:05 pm Post subject:

Yer.. i have also had success in the past with 2 part epoxy putty such as milliput

In fact i always carry some

However, soldering or braising is defiantly preferable and 931Owner..., you will probably find, anything but the biggest of soldering iron doesn't have the heat inertia to get the corner of a 924 tank hot enough to melt the flux, let alone the solder.
oxy acetylene torch is the way to go but make sure your tank is fume free before you light the torch. Fill with water is a good one but not to the point your area to be patched has water behind it as you will never get the heat on it to do the repair.

_________________
924 (84) N/A 2 ltr - 5 Speed - BLACK - Project (looking for 200BHP, any ideas!)
924 (81) N/A 2 ltr - 3 Speed Auto - SURINAM RED (Metallic) - Near Original Spec (sticking with originality)
BOTH ON THE ROAD, BOTH USED EVERY-OTHER DAY

Rich H · Posted: Thu Jun 10, 2010 5:31 pm Post subject:

the old style big copper lump on a stick soldering irons are good for big repairs as you can get them really hot.

My grandad had the best tool for the job, a 300W soldering iron from about 1950 - it was massive! But it went missing

_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

Joes924Racer · Posted: Fri Jun 11, 2010 2:23 am Post subject:

Wow .. nice work RC. Im gonna pull mine i guess and maybe reseal it.
and check out that area..for the stress cracks.. Yea dont screw a sub down on top.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

!tom · Posted: Mon Mar 26, 2012 5:20 pm Post subject:

I've been looking for these holes to mount a car seat anchor for a while. I figured if I couldn't see them from the top (there's some factory installed goo over the sheet metal with holes in it where I'd expect the anchors to go), I'd be able to see them from below.

Nope!

Maybe the different markets had differences here.

Now I just have to figure out how to mount the anchor back here and still be able to fit the tank in!
_________________
78 924 NA
5-lug

staticsan · Joined: 19 Jan 2009 Posts: 450 Location: Sydney, Australia

I should have pictures to hand, but I'm not that organised.

The factory fitted holes are ~6mm and about a foot behind the seats. But they don't pass NSW rules. So the seat fitter I went to put them on the rear panel, inward a little from the rear lights. There is a small structural panel that seems made for it.

I'll find pics in a few days.

Wade.

!tom · Posted: Fri Mar 30, 2012 3:07 pm Post subject:

staticsan · Joined: 19 Jan 2009 Posts: 450 Location: Sydney, Australia