I know everyone has seen (or at least heard about) the cracks that occur on the firewall around the brake master cylinder, but...
...my new purchase (3 weeks ago) has the same cracking, but far worse than I have ever seen, around where the clutch master cylinder goes into the firewall.
Anyone ever seen this before? It took quite some time on a welder to repair.
Primm
Firewall crack
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23yrRebuild
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I fixed mine with a bracket.
Last edited by 23yrRebuild on Tue Dec 30, 2008 11:04 am, edited 2 times in total.
Mike - '67 Stroker / 5-Speed
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S Allen
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RE:Firewall Cracks
I have seen it several times. The firewall is a weak link in the pushing it recieves from both the clutch master and the brake master. On the 65 I will be putting the SR in the clutch master fire wall had cracked so badly that some one had put a piece of 1/8" plate steel in there and brazed it covering the cracks. I cut the whole mess out and will fabricate a replacement part out of thicker sheet metal. Not that unusual at all.
Steve
Steve
66 Stroker-Going Orange
67 SRL311-00279-resto project
Stock '72 240Z-Blue
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67 SRL311-00279-resto project
Stock '72 240Z-Blue
2002 Ford F250 7.3 Diesel 2WD Hauler
2008 Toyota FJ Cruiser
2009 Smart ForTwo Passion Coupe
2013 Fiat 500 Abarth
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SLOroadster
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67.5s and later all seem to do it. Its because of the indent to make room for the dual master cylinder. Almost all the cars I have seen pre restoration sufferr from this. If you have a right hand drive car, they don't seem to have the issue. Get a brake brace from any of the vendors and you should be good to go. It will make the brake pedal feel much better.
Will
Will
Sorry, I find modern engine swaps revolting. Keep your G, R, or U series in your Roadster!
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Primm69
Hmmmm. So since it's a 65 model and RHD, this shouldn't have happened!SLOroadster wrote:67.5s and later all seem to do it. Its because of the indent to make room for the dual master cylinder. Almost all the cars I have seen pre restoration sufferr from this. If you have a right hand drive car, they don't seem to have the issue. Get a brake brace from any of the vendors and you should be good to go. It will make the brake pedal feel much better.
Will
Seriously though, we were trying to work out what could have exerted that sort of pressure around the clutch cylinder. The brake I can understand, but the clutch side? Everything in the car is original, including the clutch, so it's not like someone has put a big heavy clutch in it either.
Oh well, a steel plate and some serious welding seems to have fixed the issue. Did the brake side too, to maybe save myself some grief later on.
Primm