S7 S/s Tub, Stress Fractures

[Guest shaggy]

Hi, can anyone advise what strengthening mods have been done to S7's?

 

I have a sierra based S7,full s/s monocok, and noticed his week that there appears to be stress fractures on the rear of the floor pan where the engine mounts sits. Its towards the back end of the engine bay,near the main tub, and both sides appear to have tears in the steel. I will be at stoneleigh to give anyone a clearer picture of the rips.

Si

 

Can onye tell me why I ca't type a entence ithout etters being missed off????

[theduck]

If the steel is torn I would not be driving it!

 

Post some pictures so we can give better advice.

[blue]

There is a lot of topics on this subject do a search and you'll find lots.

As for the stress fractures we all seem to have these although mostly around the front. Yours is the first I've heard of near the main tub.

Can you get a pic ??

 

[Guest shaggy]

will get a piccie tomorrow

[Guest shaggy]

here's a photo of the damage to drivers side

[Guest shaggy]

try again

[steve in stockport]

You need to drill a hole at the end of the cracks to stop them spreading and then get them reinforced with some gusset plates

[Guest mower man]

Drill the end of it [crack ] aput a large dia bolt with spreader plates both side and tighten feircly did mine like this 8/9 years ago been mot every year since , I think its caused by stupidly stiff front springs [180 were factory fit] and the donor a/roll bar if tou havent fitted tie bars do it and fit 120 lb springs or lower ,there is one guy on here running 80lbs if you want details on tie bar mod contact me and I will provde them free mowerman

[Guest shaggy]

Thanks Steve and Mick.

 

booked in for plates being welded on Friday before run down to Stoneleigh

 

Mick,I suspect I am running std springs so will look at replacing with 120's. Already have tie bar mod,a very kind ember on here sent me plans - now who could this have been I wonder???

[Guest mower man]

After I put that last post on it dawned on me that I sent you specs ,yes get the spring rate dropped and you will lke it even more!!! mick

[Guest shaggy]

Mick, do you know what spec I would require? i.e. spring length and Diameter?

[Guest mower man]

Mick, do you know what spec I would require? i.e. spring length and Diameter?

120lbs ,dia as what you take off could be 1,9 or 2,24 depends on damper type length same as you take off [free length ] as said it is p[ossible to go softer I have the pinto boat anchor in ,with zetec you would poss take another 10 at least ,this is guesstimate !!!!! mick

[Peter Bell]

I had that problem many years ago, drilled a small hole at the end and had them welded by someone who knows what he is doing and had no problems since. They start at the end of the flanged return on the floor panel where there is a sharp corner instead of a radiused one. I suspect the split starts as soon as the panel is bent! I also have softer springs btw.

[Guest shaggy]

Thanks Peter, glad its not just mine then. Thought it might have been the zetec transplant, added with a heavy right foot that was he problem.

Going into a fab shop on friday to drill at the end of the crack and weld a plate over the whole area.

 

also looking at buying softer sprigs this weeked

 

Ta Si

[Mitch]

As fit typo and missing letters

 

http://www.rhocar.org/index.php?showtopic=38738&view=findpost&p=299574&hl=%2Bmissing+%2Bletters