more problems Mot failure, rear subframe

[220bhp]

Thanks John , much appreciated

[s2driveruk]

Thanks for the advise.
My problem is the car is in my mates garage and I am on a time limit.
How much work is involved in removing repairing and replacing .
Also what was the cost

From memory, was a while back, £30 for it to be blasted, £80 for the welding at a local bodyshop/classic car place and then £30 for zinc prime and black powdercoat.

Good luck!

[220bhp]

Thanks

[vonbeck]

Thanks

Just be carefull with powder coating stuff as if and when it chips( and it will) water will get underneath and wil rot I've done both my subframes and used hydrate 80 then about 3 coats pro 15 chassis black and will probably see me out

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[John.]

Just be carefull with powder coating stuff as if and when it chips( and it will) water will get underneath and wil rot I've done both my subframes and used hydrate 80 then about 3 coats pro 15 chassis black and will probably see me out

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That's why I had mine galvanised, I'd had my struts and springs powder coated and it wasn't cheep considering they didn't look good for long

[220bhp]

Thanks

[steve briance]

Is there a reason NOT to galvanize struts? The only thing i can think is maybe the threads fill up with metal but that can sorted easier than rust in the bits you can't get a wire brush on.

[Error404]

I use EPD coating these days, its what the OEMs use. Outlasts most things.

[John.]

Is there a reason NOT to galvanize struts? The only thing i can think is maybe the threads fill up with metal but that can sorted easier than rust in the bits you can't get a wire brush on.

(it was my subframe I had galvanised, not struts....just to clarify) Galvanising does change the (molecular ?) properties of the metal I've been told.......I think the metal becomes more brittle so if it's under more stress then more likely to crack/break.
I'd be apprehensive getting the struts done, unless someone with a degree in metallurgy can say that it'd be 110% ok. !

[steve briance]

I don't have a metallurgy degree but do know that electro plating and galvanising can affect strength of steel but it is higher strength grades of steel that are affected. Think 10.9 and 12.9 grade steels for bolts. 8.8 is fine to galvanise and plate. The acid pickle phase of the process causes 'hydrogen embrittlement' hydrogen absorbed into the surface of steel makes it brittle. Why its only high strength steels affected I don't know.
I doubt the steel used for subframes and struts is high strength and based on the fact b3 chassis parts are galvanised makes me think it is an acceptable process that is probably not more wide spread due to manufacturing costs. As enthusiast restorers, that issue goes out of the window doesn't it?!

I might investigate galvanising struts but would paint afterwards to prevent the visible oxide layer building up into the dusty surface you sometimes see on galv' parts.

[220bhp]

Thanks for all the advise.
I have started to take the sub frame of and. some of the bolts are seized, so I have covered them in penetrating oil ,
Has anyone got a list of parts required for a refurb.
What bushes ,OE or poly . Which bolts should I replace.etc

[vonbeck]

Thanks for all the advise.
I have started to take the sub frame of and. some of the bolts are seized, so I have covered them in penetrating oil ,
Has anyone got a list of parts required for a refurb.
What bushes ,OE or poly . Which bolts should I replace.etc

I used alberts street bushes for the subframe and I got all the nuts and bolts from Audi I also did the engine mounts and gearbox mounts with new bolts etc they set me back about £80


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[220bhp]

Sub frame is of now , but it’s in bad shape .
I will post some pics tomorrow. Not sure if it’s repairable.
Is the rear sub frame unique to the s2 coupe, or can I use the sub frame of any other Audi model and weld the
Anti role bar brackets on.

[Tractor Dave]

Goodazz has one on here for sale. Looks good, but it's in Lithuania so postage will be considerable. Depends what deal he will do for you.
I have received quite a few parts from Latvia, no problem at all and quick postage.

[John.]

Sub frame is of now , but it’s in bad shape .
I will post some pics tomorrow. Not sure if it’s repairable.
Is the rear sub frame unique to the s2 coupe, or can I use the sub frame of any other Audi model and weld the
Anti role bar brackets on.

B2 fits but has no roll bar mounts, B3 20v is same , B3 10v has no ARB