924Board.org

[frankg]

Before I let go of the cars I have, what are the most rare spares to source?

I assume quite a few items are now discontinued but can be sourced from other cars of even other models. I just don't want to loose something that could help someone else out with later even if no one needs them now.

I have almost 2 cars and will be selling them to make one, so any surplus I am happy to take off salvage and store.
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Life is about living, we all leave soon enough.

[McGyver]

Depending what series you got 1-st or 2-nd?

If you want keep 931 original almost all engine parts are unique for this motor. Fuel injection is unique especially in S2 DITC and @#$@# Flywheel sensor (which is only thing can't stop car running and can't be fixed - only way is find another one or go for modern digital ignition or EFI
Most parts which are hard to find will be cylinder head, good uncracked exhaust manifold, turbocharger, DITC with flywheel sensor, Fuel metering unit,

Things like wastegate, injectors are common with 930 so you can buy new ones as I know... if you have enough money of course
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931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car
www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

[frankg]

It is a 1980 series one I bought complete minus one broken piston !! As I couldnt source one when I bought it I bought another 931 and it ended up being too much fun so I used it as I bought it not for a donar car as first intended, shame to break a good car. Now I want the space as I dont have the storage anymore so both have to go, but I want to try and get as much out of them as I can without being silly, as much as help others too.

Im aware of the fact many things are unique to the model, not that its a reason to exploit anyone, but these cars dont fetch good money and are SADLY worth more in parts. I might well fund fixing my 928 if all goes well !!
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Life is about living, we all leave soon enough.

[ideola]

S1 pistons really aren't worth much, especially if not in a matched set. Here's what I would recommend that you hang on to. If you can't find anyone who needs this stuff, let me know and maybe we can work out a deal for the lighter stuff to be sent over here and added to my parts bin:

• Complete ignition setup: the silver box on the fender well behind the LHS headlight; the distributor; and the coil.
  
• Salvage the head gasket locating sleeves (two of them). NLA and should have no problem finding someone who needs them.
  
• If the head is straight and uncracked, with an undamaged deck, and within the wear limit, save it. Make sure to keep the bearing caps. Protect the bearing and gasket surfaces with assembly lube.
  
• Cam oiler tube if it's straight and unclogged (pitch the plastic elbow)
  
• Remove all of the grub screws from the lifters and put them in a ziplock
  
• Lifters, but only if they aren't pitted. Apply assembly lube generously.
  
• Cam, if none of the lobes are flattened or pitted, keep it as a good used spare; if the lobes are damaged, it is still good as a core for someone who might be interested in a hard-faced cam. Apply assembly lube to all of the journals and lobes.
  
• Pull the crank and measure the main journals. If they're within standard spec, save the crankshaft, as oversized bearings are NLA. Apply assembly lube to the main and rod journals.
  
• Oil pump.
  
• Oil pickup tube, especially if it's the two-part design with the lightweight alu bracket that affixes to the main crank bearing caps.
  
• Trans; or more specifically, the Euro-spec fifth gear and R&P, which provide a shorter final drive that is desirable on shorter tracks for guys with G31s.
  
• Green-lettered gauges as a set.
  
• Exhaust manifold, assuming it is uncracked. (Apparently, the RHD 931 exhaust manifolds don't crack as badly as the LHD versions).
  
• If you have room, save the torque tube, provided the bearings aren't grinding or making noise when you spin it.
  
• Remove the turbocharger, and disassemble it, at least to the point where you can inspect the inside of the turbine housing. If there is no evidence of damage to the turbine fins, then the housing is usable, even though it will almost certainly exhibit some cracks in the scroll. Given that it's a Euro spec S1, there's a chance it may be a 6.10 housing, which is definitely worth hanging on to. The rest of the turbo bits don't really have much value, but if you have room, keep them as spares.

There might be more, but that's the list I would start with. Most of the rest is just run of the mill 924 stuff.
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erstwhile owner of just about every 924 variant ever made

[ideola]

Add to the above:

• Vented badge panel with four plastic vents intact
  
• NACA duct hood
  
• Vented chin valance
  
• Plastic rocker covers with all four end-caps
  
• Wastegate, primarily to scavenge the stiffer Euro-spec spring (assuming it's still intact).

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erstwhile owner of just about every 924 variant ever made

[frankg]

Disagree with you on the pistons, they are impossible to source, and if I had I would have probably rebuilt her when I bought it and not buy another one to take the engine out of instead. The S1 pistons might not be as sought after as the S2 ones, but they too have been unavailable discontinued and out of stock for many years. I dont have a set I only have 3 of them cos one was broken - hence I needed to source but couldnt

I have taken off and saved many of the parts above, but thanks for the list it does include a few things I hadn't kept.

I will need to research some of the bits above cos I dont even know what they are :O
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Life is about living, we all leave soon enough.

[ideola]

The problem with pistons is that very few can be reused now anyway because the blocks are now out of spec and requiring enough work that the original pistons will be too small. I know this because people come to me all the time asking for OEM oversized pistons, which are still available but insanely expensive. Not to mention ring packs. Of course, you could sleeve the block to retain 86.5mm bores, but that also gets expensive quickly.

For the price of one set of oversized pistons + one set of oversized rings, you could be almost three sets of custom lightweight forged Diamond pistons with new wrist pins and total seal rings. Kind of a no brainer.
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erstwhile owner of just about every 924 variant ever made

[McGyver]

Pistons are could be expensive (maybe not S1 I payed 100-200$ for a set) but never found full and good set of S2. I payed about 100$ for set of rings custom made for my 931 which are made with a little better dimensions than stock ones... but that company can made rings in any size for any pistons

My Pistons after machining grooves:
- The first compression was extended
- The third oil was dredged
so I needed custom made rings in right size

frankg what is size of your pistons? Maybe photo will help to find missed one
I had 3 sets of 931 S1 pistons and some single ones (from 86,48 up to 86:9 I sold all already but that guy might still have them and available for sell separately.
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car
www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

[frankg]

I do have the 4 pistons, sadly one is slightly cracked. The rest of the engine is MINT having just been rebuilt before it blew, the head is like new. But I have not taken that into account when breaking and selling as I only wanted to get back what I had financially in the car - £650 !!

I am still seriously thinking of swapping my own engine and box into the 951 look a like and finishing the project I had intended, but breaking a standard 931 maybe too much now they are getting quite rare, but then they were always quite rare anyway.

Problem is the 931 is not worth a lot in the UK, you can sell a standard 924 for more than a 931 !! very few people want them so there is little to no incentive in investing in and restoring them. SADLY !!
_________________
Life is about living, we all leave soon enough.

[McGyver]

From photos you posted I think you wrong and you have series 2 car ... that will gives much more probability why this piston is broken... Post one picture of your pistons and everything should be clear. If it is really S2... you should get more than £650 for parts!!
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car
www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

[frankg]

And no I have not cleaned them up, remember they have been sat in a box in my garage for erm, a long time !!! still one to find and the one on the left is the broken one, broken between top and middle rings






I am not expecting the two pistons to be worth a right lot, but more I would hope they come in useful to someone who might be able to use them again??
_________________
Life is about living, we all leave soon enough.

[McGyver]

Check what size they are... should be number on top of each piston... 86,XX ??
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car
www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

[frankg]

dont know about 86 but looks to be 06/24 at the bottom of the top of the pistons with 503 070 top of top of piston
_________________
Life is about living, we all leave soon enough.