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1983 Mini City

This section is for Mini projects and restorations and also the place to show off your pride and joy.

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colinf1
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Re: 1983 Mini City

Post by colinf1 » Sun Nov 15, 2020 1:17 pm

Stuck my 3d printed numbers onto the plates this evening, drew up a guide to help with keeping it all in-line.

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Polyurethane adhesive on the back of printed parts, should be more than strong enough.

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Then added some industrial weights. Let it set overnight.

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A nice, relatively clean job to do at kitchen table rather than in a cold, breezy garden shed...



colinf1
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Re: 1983 Mini City

Post by colinf1 » Sun Nov 15, 2020 1:18 pm

All fully cured, hopefully they won't fall off...

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colinf1
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Re: 1983 Mini City

Post by colinf1 » Sun Nov 15, 2020 1:21 pm

Sent the shell off to be media blasted today, bit of a rush job getting last few bits stripped. A bit of careful maneuvering to get it from concrete pad at bottom of garden, across the grass and down side of the house to be loaded onto a trailer at the front.

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Bonnet got slightly squashed on one side when moving it, hopefully that will pull out of it

Nuts on door hinges were a bit awkward to get off, especially on passenger side where they had been covered in body filler and silicone. A few sheared, but the main thing is the doors were off.

Got to the blasters and realised I forgot to take the VIN plate and door striker plates off. I have to drop round my alloys to get done so I'll take them off then.

Both sub-frames and bumpers sent also, be a few weeks before its back, but I'm not in any rush.

Found this stamp on the rear subframe, looks like its the original subframe

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Separated the old cones from the trumpets on the front, one trumpet was full of gunky water and thread on the cone was extremely corroded.

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The totally opposite on the other side...it was full of bone dry sand!

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colinf1
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Re: 1983 Mini City

Post by colinf1 » Sun Nov 15, 2020 1:22 pm

Cleaned up the backing plates for the brakes, fronts were very rough, all bent out of shape from someone prising the drums off, but apart from that they were fine.

Also cleaned up the hub flanges, have removed the short studs ready for longer ones for spaced drums.

One of the drive flanges looked to be damaged, had material squashed onto the mating face, so the drum would never sit on properly.

On closer inspection it looks like 2 cuts in a v shape, then hammered/squashed to stop the stud from spinning...hmmm...

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Removed the stud then flattened down the mated surface, pressed stud back in and tested the stud for spinning, seems to be holding fine

There was also some material on the mating face of the other drive flange, but this just needed to be filed flat.

Gave them all a quick coat of rust remover ready for some satin black tomorrow.

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colinf1
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Re: 1983 Mini City

Post by colinf1 » Sun Nov 15, 2020 1:23 pm

Dropped off my wheels to be blasted, had a quick peek at the shell while I was there...😬😬😬

A few more holes, but nothing that's too bad..

Long dent on rear quarter,

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Boot floor bit worse than I had initially thought..

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Bit gone on corner of parcel shelf..

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Passenger side rear window
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Passenger step was biggest surprise...so far...

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Bottom of passenger a panel

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Drivers step, small hole on top of door frame

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Engine bay and bulkhead looks good, even front half of inner wing looks fine..

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Also got new bearings in both rear hubs, also new longer studs for the stepped drums. Didn't grease them up yet, I'll wait until I get a radius arm finished so I can bolt them up and put grease caps on.

Cleaned up and painted one of the radius arms and one lower front arm.

Was a bit of damage on lower arm mating face, just needed flattening down.

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Billy
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Re: 1983 Mini City

Post by Billy » Sun Nov 15, 2020 3:42 pm

What blast medium did you use? Were you happy with It?

colinf1
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Re: 1983 Mini City

Post by colinf1 » Sun Nov 15, 2020 4:35 pm

Think he is using crushed glass, quite happy with the results so far, at least now I can see whats needed and whats been bodged over in the past.

Now my next problem is storage of the shell out of the elements, I have been using the stormforce cover, but thats fine with a proper top coat, dont think its gonna work with just primer.

Think I have to invest in a bigger shed, currently only have an 8ft x 8ft garden shed which is filled to the brim with parts!

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Billy
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Re: 1983 Mini City

Post by Billy » Mon Nov 16, 2020 8:35 am

With all the great effort (and expense) you're putting into the car, it would be a shame if you couldn't store it indoors properly. Talk nicely to Santa!

ctwomey
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Whats your location?: Ballybrittas, Co. Laois
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What Minis have you?: I owned a 1977 Mini 850 when I was in my late teens. I owned a 1986 Mini Chelsea that I imported from the UK. Also owned a MG Metro that was bored out to 1293. Restoring a 1981 Dublin Mini City.
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Re: 1983 Mini City

Post by ctwomey » Mon Nov 16, 2020 5:39 pm

colinf1 wrote:
Sun Nov 15, 2020 1:16 pm
Logbook recorded as 99H791PZ 134199 and engine block has 99H997P 134199. Not that it makes much difference but it would have been nice to have it matching.
Hi Colin,

Great work by the way.

From my own research, the 99H791PZ engine is one of the very first A+ Blocks (99H791P being the last of the A Blocks). It should have a coolant drain on the back. Usually mated with the DAM 2886 gearbox. This is what I would expect for an '80-'81 Mini 1000 and possibly up to '83.

The 99H997P is a much higher CR A+ engine with flat top pistons and an economically final drive (2.95). It would be interesting to see if the main cap is center locating tab or to one side, that would help even further. Given the engine numbers are identical except for the prefix, seems like too much of a coincidence to me. Is it verto or non-verto? Also what is the gearbox casing number?

ctwomey
NON Member
Posts: 41
Joined: Thu Jan 03, 2019 9:44 am
Whats your location?: Ballybrittas, Co. Laois
Region: Eastern
What Minis have you?: I owned a 1977 Mini 850 when I was in my late teens. I owned a 1986 Mini Chelsea that I imported from the UK. Also owned a MG Metro that was bored out to 1293. Restoring a 1981 Dublin Mini City.
Contact:

Re: 1983 Mini City

Post by ctwomey » Mon Nov 16, 2020 5:44 pm

Hi Colin,

Sorry just seen the engine picks. That isn't a 99H791PZ engine/gearbox combo. I wonder when writing up the logbook they made a complete mess of it.

colinf1
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Re: 1983 Mini City

Post by colinf1 » Mon Nov 16, 2020 6:11 pm

I've also noticed the vin plate is different to the logbook record, but again it's identical final 6 numbers, most of the SAX part is the same, just middle section is different, again I just checked the last few numbers when I got the car first...

colinf1
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Posts: 28
Joined: Mon Aug 24, 2020 10:27 am
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Re: 1983 Mini City

Post by colinf1 » Mon Nov 16, 2020 8:00 pm

ctwomey wrote:
Mon Nov 16, 2020 5:39 pm
colinf1 wrote:
Sun Nov 15, 2020 1:16 pm
Logbook recorded as 99H791PZ 134199 and engine block has 99H997P 134199. Not that it makes much difference but it would have been nice to have it matching.
Hi Colin,

Great work by the way.

From my own research, the 99H791PZ engine is one of the very first A+ Blocks (99H791P being the last of the A Blocks). It should have a coolant drain on the back. Usually mated with the DAM 2886 gearbox. This is what I would expect for an '80-'81 Mini 1000 and possibly up to '83.

The 99H997P is a much higher CR A+ engine with flat top pistons and an economically final drive (2.95). It would be interesting to see if the main cap is center locating tab or to one side, that would help even further. Given the engine numbers are identical except for the prefix, seems like too much of a coincidence to me. Is it verto or non-verto? Also what is the gearbox casing number?
Thanks ctwomey! Hope it will be worth all the effort once I get to drive it!

Gearbox casting number is DAM5626, which quick search says its from a later twinpoint/mpi model

Clutch is verto (small arm)

Pistons in this engine are flat top as I have head off to check for unleaded valve seats, but havent got that far yet!

"It would be interesting to see if the main cap is center locating tab or to one side" what or where is this lol

The rear subframe was stamped/marked 25 83, car was registered November '83

ctwomey
NON Member
Posts: 41
Joined: Thu Jan 03, 2019 9:44 am
Whats your location?: Ballybrittas, Co. Laois
Region: Eastern
What Minis have you?: I owned a 1977 Mini 850 when I was in my late teens. I owned a 1986 Mini Chelsea that I imported from the UK. Also owned a MG Metro that was bored out to 1293. Restoring a 1981 Dublin Mini City.
Contact:

Re: 1983 Mini City

Post by ctwomey » Mon Nov 16, 2020 9:17 pm

The DAM5626 gearbox is the preferred casing for high powered motors. This gearbox casing only uses 3 bolts to hold in the C bracket for the main shaft bearing, while all previous casings used 4 bolts, one of which had a tendency to crack.
colinf1 wrote:
Mon Nov 16, 2020 8:00 pm
"It would be interesting to see if the main cap is center locating tab or to one side" what or where is this lol
The main cap is the crankshaft main bearing caps. Older engines had the slot to hold in the bearing to the side of the cap. Later ones have the slot in the center of the cap and are considered stronger.

Anyway, changing the final drive to 3.44 with the high CR pistons should make it a very usable motor. If I was changing the final drive I would also replace the diff pin with a much harder one that won't wear as fast. Even my 36K mile gearbox the pin was very badly worn.

If you do intend to rebuild the gearbox be super careful where you buy your bearings from. I would recommend Guessworks as your source and only buy either INA/Koyo, RHP or Torrington.

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