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My first 930 - The good and the bad

Just got my first 930 Turbo and enjoyed it for the first week or so of ownership before taking it in to a local shop to get a valve adjustment and to address a few minor, known items.

Unfortunately, what I understood to be some suspension pan compromises due to past battery leakage turned out to be a bigger issue than expected. Rust was pretty extensive. So, I'll be getting this cleaned up first before I get to explore any of the fun upgrades since this posed more of a safety issue (the front control arm was compromised since it was literally bolted onto flimsy rust).

I'm documenting this here more for my benefit of keeping my build process all in one place.







Old 06-28-2017, 03:30 PM
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So, got most of the rust cutout and the new suspension pan in.





Old 06-28-2017, 03:52 PM
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Suspension pan:




They're about to weld and seam seal the pieces, send it to paint and then back for assembly. Maybe a week more? Looking forward to getting her back!
Old 06-28-2017, 03:54 PM
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That's painful to look at.. been there 30+ years ago with rusty old 4 cylinder BMW's.
Hurts the neck too.

I hope you've removed the rocker panels and looked at the longitudinals.
If the floor is rusted like that the bottom of the longitudinals are too and pretty much the whole bottom of the unibody chassis should be cut out in sections and replaced. Then primed and painted with epoxy primer or what ever is good these days.

If the inside of the doors are rusty you can remove the door panels and paint the insides with old motor oil to stop the rust for a while.
Gearbox oil is thicker and would probably last longer but might smell inside the car.
Old 06-28-2017, 06:11 PM
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Oh good, you moved this from the for sale forum. Now we can comment.

That rust isn't all that bad. If you got the car at a good price, sweat it not.

When you get to the motor, let's talk. Stock 930s aren't as much fun as they should be.

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Last edited by kenikh; 06-28-2017 at 07:40 PM..
Old 06-28-2017, 07:37 PM
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Ugh I hate RUST, and I know the disappointment of finding it. I've owned 6 911's and all but my 930 had rust issues that I found.

Welcome to the madness!
Rich
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Old 06-28-2017, 07:50 PM
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I agree, not too bad. Can ALWAYS be worse. Kenik is right, stock 930's were awesome back in the day, but today, not so much - BUT - the good news is that like the rust, it can be fixed. I'm running (on dyno) @ 540 to the rears on our 930 and Torque is close to 600. Now THAT is fun �� Welcome to the bird.
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Old 06-28-2017, 08:20 PM
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Welcome to the club! Rust sucks.. but bright side is that it was in the perfect spot for a replacement panel! Looking forward to seeing this back on the road asap!

another advocate for non-stock engine
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'79 930 turbo RoW - Oak Green Metallic - k27-7200 - Kokeln Intercooler - RarlyL8 headers/muffler - Leask WuR - Tial 46mm - Rebel racing sphericals front/rear - ER Monoballs front/rear - ER adjustable spring plates - 29/23mm TBs - Wevo engine mounts - Rebel racing transmission mounts
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Old 06-28-2017, 09:17 PM
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My advise. Don't let the front pan project snowball into this. Front suspension pan repair

Otherwise it should be a quick fix.
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Old 06-29-2017, 07:07 AM
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Hard to say if it is bad or not with just these pictures. Make sure you thoroughly check out the rest of the car as stated above. Been there in an early 911 and BMW 2002's. what I thought was just a front suspension pan replacement in the 911 turned out to be full front pan, inner fenders and inner and outer rockers...Hope what you see is all of it.
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Old 06-29-2017, 08:17 AM
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I did some diagrams of where to look for rust a while ago:

1972 Rust
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Old 06-29-2017, 08:37 AM
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welcome to the insanery here (*beware*!!!), and good work so far

how about some pics of the car - years / mi / etc
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Old 06-29-2017, 10:55 AM
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Thanks guys for the sympathy pains I had the guys over at Colvin Automotive do a full check out on the car for this and they did indeed find that the rust had migrated beyond the front suspension pan but was still confined to the immediate areas. There's actually another piece in the picture that they needed to replace and they'll still need to patch a few smaller areas near the inner wheel well by the battery box.

I still feel I got a good deal on the car but it was more about the shock to have the dreaded "R" word mentioned to me when I got it checked out. I knew there was a hole from battery acid, just didn't know that had stripped the galvanized finish and that that led to such rust. Scary thing was that the front control arm was attached by rust! Luckily no harm to me or the car driving it there.

Also luckily, the engine checked out great with great compression/leakdown numbers. And no stock engine here; K27 turbo, B&B headers, heat, exhaust, new wastegate, etc. Still running a stock intercooler though which I had planned to address as budget allows, along with new tires/wheels and perhaps some upgrade to suspension, strut brace, etc for better handling. Eventually the 2nd gear synchros since they seem to be worn down a bit but it's completely drivable right now although I have to baby that shift from 1st to 2nd.

Overall, still happy with the car and looking forward to getting her back on the road! Here are a few pics:





Old 06-29-2017, 01:54 PM
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Gorgeous car...get rid of those H5s or you'll never want to drive at night!

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Old 06-29-2017, 02:13 PM
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Sweet!
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Old 06-29-2017, 02:23 PM
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kenikh, I couldn't agree more. Comes down to budget and I'll be working through the items on my to-do list, starting with handling (wheels/tires/suspension) and other low hanging fruit items and then moving on to power (intercooler/MDS/maybe upgrade turbo). Too many things I'd want to do to get this car perfect but not enough cash But it's a long term project for me so no rush.
Old 06-29-2017, 04:44 PM
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One step at a time! I have a cheap set of nice H1s when you're ready.

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Old 06-29-2017, 05:12 PM
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So when I replaced my inner fender/wheel areas years ago, i actually bought the sections from a Porsche junk yard so I did not have to fabricate anything. Just cut out the old, and welded in the new.
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Old 06-29-2017, 07:16 PM
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kenikh, I'll keep that in mind and will message you when I'm ready to take that project on!

timc, fortunately most of the rust was contained in the front suspension pan so very little actual fabrication is necessary.
Old 06-30-2017, 12:12 PM
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(fwiw H1's are one of the best upgrades I've done to mine... 80/130 ftmfw, esp if you DRIVE the car... both functionally and aesthetically... they're GORGEOUS and truly truly do 'make' the car, IMHO)

just sayin 8-)

Hear ya on budget... if you're not a purist, you can get great $$$'s for your H5's which will more than offset your H1 acquistion... and then do the same w/ all your other take-off's. Mine funded my course of (at least somewhat) substantial mods... also made possible by DIY.

beware, we're a persuasive and enabling bunch - muwhahahahaaa...
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past:

| '01 ///M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 07-05-2017, 11:27 AM
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