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fuel tank
dunk3 - 3/10/08 at 05:31 AM

hi all whats the best way to fasten my alloy petrol tank to the chassis on my mk indy . some say uni bond.. but would that be ok to pass the sva ..

:{THC}:YosamiteSam - 3/10/08 at 07:05 AM

a pair of ally straps would be better

Mr Whippy - 3/10/08 at 07:09 AM

what...glue?!

nope don't do that, use a pair of steel straps, with thin rubber or foam between them and the tank.

bigpig - 3/10/08 at 07:55 AM

MK say they just use sikaflex now and don't bother with the straps anymore.

I'd personally prefer straps in case I ever have to take the thing out at some point.

dunk3 - 3/10/08 at 07:57 AM

ok thanks, i will be using steel straps. thanks...

02GF74 - 3/10/08 at 08:29 AM

or really really long and wide cable ties?

longest I've found, in stainless are 1 m but you can double/triple/... then up.


why aren't tanks made with tabs so that they can be bolted to chassis?

[Edited on 3/10/08 by 02GF74]

Mr Whippy - 3/10/08 at 08:35 AM

quote:
Originally posted by 02GF74
or really really lon g and wide cable ties?

why aren't tanks made with tabs so that they can be bolted to chassis?


Best thing about the straps compared to bolt on tabs is in a crash the tank can move around a bit without tearing, where as a tab may rip off and cause the tank to leak. Most production cars with tabs have deformable mountings (simple brackets) that will give and bend without stressing the tank too much.



[Edited on 3/10/08 by Mr Whippy]

iank - 3/10/08 at 08:40 AM

Bah, beaten to the post by the Whippy.

Tabs on an aluminium tank can crack at the weld as they all move slightly under cornering due to the weight transfer as the fuel sloshes round.

Are SVA ok with glued in tanks? Guess they must be, but seems a bit on the edge.

[Edited on 3/10/08 by iank]

mojojeff - 18/10/08 at 04:32 PM

i wasn't to confident just using Sikaflex only as MK suggested so added a strap as well.

omega 24 v6 - 18/10/08 at 05:00 PM

quote:

MK say they just use sikaflex now and don't bother with the straps anymore.


WOW really??? Very very surprised to hear that.