Technical 1.2 Sump bolts
- Thread starter Kiwiinabd
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Technical 1.2 Sump bolts
Why not just reuse the bolts that are already there?
If one or two of them happen to be missing then getting replacements from a Fiat dealer is probably your best bet.
It's been a while since I did our old Mk1 Panda Parade but I'm fairly sure they are metric 6mm bolts with a same threaded nut in each corner (so 4 nuts). The sump was very very rusty and when I replaced it I had thought I might need to replace all the nuts and bolts. When it came down to it though I was able to reuse most of them (I think I replaced half a dozen). I just bought normal bolts (actually, to be correct they are called set screws because they are threaded all the way down - bolts are only threaded for part of their length) and cut them to the length I needed. It was easy, they are only small diameter.
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Methinks they are M6 x 16mm long.
Fit stainless and they'll out last the rest of the car.
Fit stainless and they'll out last the rest of the car.
Fitting a Aluminium or steel sump (or any other part) with RVS (stainless) bolts will make the lesser metal rust twice (or even triple) as fast.
gr J
gr J
Good point. Worth looking up that metal compatible table & checking what can be paired with various metals.
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The rate of bimetallic corrosion depends on lots of factors.
Though it's mainly contact area and type and temp of electrolyte that determines how much current flows between the two different metals that causes the corrosion.
Strangely, the rate of corrosion is only really deemed a potential problem using carbon steel fixing to fasten stainless parts rather than using stainless fixings to fasten carbon steel parts.
The rate of attack is negligible this way around as it's usual that the carbon steel is protected by paint anyway and this isolates the contact between the two.
The accepted prevention to negate any minimal contact that might still occur is to use a barrier like copper grease.
Though it's mainly contact area and type and temp of electrolyte that determines how much current flows between the two different metals that causes the corrosion.
Strangely, the rate of corrosion is only really deemed a potential problem using carbon steel fixing to fasten stainless parts rather than using stainless fixings to fasten carbon steel parts.
The rate of attack is negligible this way around as it's usual that the carbon steel is protected by paint anyway and this isolates the contact between the two.
The accepted prevention to negate any minimal contact that might still occur is to use a barrier like copper grease.
