E46 sill rust - Too far gone? Scrap or repair?
E46 sill rust - Too far gone? Scrap or repair?
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Alexanderfitu

Original Poster:

44 posts

121 months

Tuesday 24th May 2022
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HI all



I just bought a 330 CI M Sport Coupe manual - 161K. The car itself is a well cared for example, bought from a friend who owned it for 10+ years.



In this time, he has done calipers, bushes/arms, front wings, seals, gaskets, rad pack, header tank and huge pack of pipework and serviced it well, scorpion exhaust etc.



It then sat in a field for a year and was not used. I bought it from him for not a huge amount of money (less than 2k) and put it on my ramp, pulled the side skirts off and started prodding:





Most of these holes started around the plastic retaining pegs for the sideskirts. It also needs some rust repair on the NSR arch near the bumper edge. OSR is clean (arch wise!).



So, its going to need 2 new sills both sides, paint all around etc. I have had a quote from my trusted bodyshop of £2400 all inc. The jacking points themselves are all still solid.



It also needs a new rear brake line, and a few other little bits (oil filter housing gasket a few other bits)



The opinion of people on here would be very welcome.



As far as I see it, I have 3 options:



1. Pop it back together, sell it for spares and repair, probably for slightly less than I paid?

2. Bodge it a bit (plate it), pop the skirts back on and enjoy it until it rots away

3. Do the bodywork and enjoy it as a nice clean car (I suspect this + the mechanical work would put me in the region of a nice clean 330CI but I do knot know the market well enough to comment on this)



Answers on a postcard. Or even better, in responses to this thread.

brillomaster

1,613 posts

190 months

Tuesday 24th May 2022
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Presuming you bought it to drive it, and bought it knowing it had a limited lifespan, id go with option 2 - bodge it and drive it till its no longer bodgeable. How many of those holes are actually mot failures?

Alexanderfitu

Original Poster:

44 posts

121 months

Tuesday 24th May 2022
quotequote all
Yes, well it was not bought with having a 2 year lifespan in mind, however, given its cost it may as well have been.

Additionally, its a 22 year old German car, so it was bought with that in mind.

I Will touch base with the MOT station, but I think both sills will need to be plated front to back for it actually pass. On the OS, the hole is big enough for me to get my arm into

egor110

17,612 posts

223 months

Tuesday 24th May 2022
quotequote all
In my experience ( ford pumas) you'll never get rid of the rust.

Patch it and it's absolutely coming back get it cut out and replaced and it rears it's head again somewhere else .


julian64

14,325 posts

274 months

Tuesday 24th May 2022
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What I would do is get an angle grinder to teh whole of the sill with a wire brush on it and take it back to metal.

You might be surprised how little is actually rusted, and at that point make a decision

1) patch weld
2) replace the sill with a new one.


I had the same problem a number of years ago with a 323i I had patched a few holes in the sill but always found it difficult after the patch to get good rustproofing done and therefore the area surrounding the patch used to rust away and therefore the patch got bigger. I did this a few times until at last the MOT guy said look I can pass this but to be honest its starting to look like a dogs dinner. he gave me the number of a welder and told me to go and see him. Probably took pity on me as I was an impoverished student running a car I obviously couldn't afford to run properly.

So bought a new sill online. Went to the welder. Asked to stay and help.
The welder took an angle grinder cutter to teh sill and after five minutes the sill was off. He drilled a number of holes in the sill at the edges I held it in place and he spot welded the sill on.

I don't think I was there more than an hour and he charged me £100. What he did was so much easier than the patching I had done before. I had the car a further three years who no problems with the MOT and then sold it.

I later got a rusty old fiatx19 which was being sold for a song because of teh rust and put two new sills on it using exactly the same technique myself. After that I decided I wouldn't patch again.

I think its really about getting your mind around what needs to be done

Alexanderfitu

Original Poster:

44 posts

121 months

Tuesday 24th May 2022
quotequote all
julian64 said:
stuff
Yes I think your right tbh, cut out the entire outer sills, and weld in a replacement and call it job done. Leave the NSR arch for a while and then decide whether to do the lot in a few years.

Overthinking it as usual.

Thanks for the input, will see what the bodyshop want to quote

Alexanderfitu

Original Poster:

44 posts

121 months

Tuesday 24th May 2022
quotequote all
egor110 said:
more stuff
Absolutely, rust is always a time game.

Belle427

11,075 posts

253 months

Tuesday 24th May 2022
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Do the skirts cover all the repair work?
If so I’d get them replaced and use a quality paint such as rustoleum combi colour to top coat, will be more durable and cost effective.
If not ignore me!

julian64

14,325 posts

274 months

Tuesday 24th May 2022
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Mave

8,216 posts

235 months

Tuesday 24th May 2022
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What does the rest of the underside look like?

Alexanderfitu

Original Poster:

44 posts

121 months

Tuesday 24th May 2022
quotequote all
Not actually horrendous, compared to the sills. The side skirt retaining holes did not help.

The subframe etc has surface rust, but other than that, and some rear brake lines that need doing, it's OK.

Alexanderfitu

Original Poster:

44 posts

121 months

Tuesday 24th May 2022
quotequote all
julian64 said:
Shame it's not for a coupe! Might cut and bodge if I can't find another.

Am going to get the sills cut out and new metal welded in, fill with dynax after paint and see how long it goes smile

julian64

14,325 posts

274 months

Wednesday 25th May 2022
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Alexanderfitu said:
julian64 said:
Shame it's not for a coupe! Might cut and bodge if I can't find another.

Am going to get the sills cut out and new metal welded in, fill with dynax after paint and see how long it goes smile
Not sure about nowadays but when I was young and impoverished, breakers used to cut out sills and have them ready to buy. A lot of cars in those days were spot welded rather than seam welded so cutting them out was very easy.

Not sure about now.

Alexanderfitu

Original Poster:

44 posts

121 months

Friday 3rd June 2022
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So, the rust is too far gone and not worth putting 2k into sorting. I though, I'll just plate it but just not possible with how far it goes on some places.

It will be up for spares/repair soon, be good as a drift car. I'll make a loss either way. Oh well

g3org3y

21,893 posts

211 months

Saturday 4th June 2022
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Sorry to hear that. frown Those plastic skirts can hide a multitude of sins on the E46 (and E36!).