PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/28 10:53:31
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Ohh good play, one of the guys at work was giving me a hard time this morning saying that I could have the car back on the road in ten days!
He clearly doesn't understand that most of the joy in building a car is the tinkering itself!
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martymexico
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/28 11:00:12
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It works out to a factor of 10.. 10 days is 10 weeks. 6 months is 6yrs etc. Mine has been a project for 7yrs when I said about a year and I've at least 1 year to go so the theory is pretty close 🤣
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PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/28 11:03:49
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Only three more years to go then 🤣
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martymexico
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/29 15:35:09
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Sincerely hope not!
Have you received your LSD centre yet or keeping it hush !
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PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/29 19:50:23
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LSD has arrived I just need to go pick it up, planning to tackle that very shortly! I got the bonnet release spring on and finished up the safety catch today. Still need to get the hardware for the latch sorted so thats my next little job along with the bonnet cable routing. Hopefully I can also pick up my powder coating bits for the long weekend so I'll have plenty to get on with!   Pretty big difference from what it looked like to start off with!
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martymexico
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/30 09:22:35
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Cool, I'd like to see the lsd before you install it , all you need is a bearing press and the rest is straightforward. Only thing that ruins the pic is those crusty bolts, swap them for a Allen button heads or something, another handy hint is to glue on a striker plate on the slam panel where the latch hits before it hooks up. I did one on my yellow van in alloy but stainless is good as well 
post edited by martymexico - 2025/10/30 09:28:25
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deano
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/30 12:21:48
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any chance then, that the bonnet spring retailing bolt could be tightened a poofteenth more, just to get the text on the bolt straight, and the hex point exactly vertical?
Other than that 100%.
(can''t wait for the equal critique on my next van pic, although you would be going all day. I wish my finishing standards were as high as yours Mark!)
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PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 11:27:23
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Went and picked up the LSD center and powder coated bits today, I've got plenty to get on with for the long weekend!    She's a well put together piece of kit!
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deano
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 12:16:37
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so when you upgrade to an lsd, is it just a matter of bolting it in and its virtually adjusted already?
Does an upgrade like this mean you still have to work out the preload, and do the crush tube setup?
I'm wondering if this sort of upgrade might negate any incorrect backlash setup I had done when playing with the diff a few years ago.
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martymexico
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 13:40:13
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Wait, holiday what..
Rooly rooly nice unit, very similar to the Quaife in construction.
The unit has it's own set slip percentage like 78% etc. As for preload you set it up as a normal centre , normally set the pinion crush load first then the crown wheel, can't really stuff it up.
You should get one Deano or have it on your Xmas list
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PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 13:40:42
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If the pinion preload is already set and the pinion seal is fine you can leave it, then you mark up the position of both the carriers and take the center out and unbolt the spider gear carrier and bolt in the LSD. The marks will get you in the ballpark for pinion/crown wheel position but you will still need to check and set gear interface, backlash and runout. It's fairly straight forward if you have the right tools. This guy here has a great video on setting up an english axle. https://www.youtube.com/watch?v=gtzU6YS0m9I&list=PLaNARHAzB0JQi6-TRfQ0FfcN7Drq-uHCk
On watching again he doesn't check interface - youre supposed to rough adjust the side to side position and then check your tooth engagement - you can use bearing grease to check it but there are proper gear contact pastes/paints you can get. 
post edited by PartTimeMK2 - 2025/10/31 13:58:15
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PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 15:46:22
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Ok so things were going great with the re-assembly, pinion bearing on, races in, top bearing in and seal in.  Was putting the crown wheel on the LSD and was about to button up the last bolt and noticed it felt a bit sketchy, pulled it back out and checked it, sure enough no good.  Thread in crown wheel not damaged thankfully, another bolt went down the hole just fine, I think it may have worked itself loose and damaged the thread at some point.  Silver lining too, notice the recess for the bolt on the Blackline? It steps down 10mm thick, which is almost same as a standard carrier which doesn't have the thickness to the hub area - the standard carrier has a 2mm step down where the bolts are, making it only 8mm thick. I am giving up 2mm of thread on every bolt, I will see if I can pick up 6 new bolts tomorrow morning but only if they have 12.9 grade.
post edited by PartTimeMK2 - 2025/10/31 16:05:37
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deano
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 18:52:27
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thanks for the explanation Mark, links and pics.
It brings back memories of a month smelling of gear oil.
If my diff does end up dying, or needs cracking open again, I'll do the same.
Unless you have a spare one in that magic wardrobe of yours Marty, alongsside the Compomotives, RS steering wheels and EFI manifolds.
Hope you can find the bolts tomoz.
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martymexico
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 19:00:47
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Nah no spares in the wardrobe sorry.. We can go share postage on 2 for 1. Blob a bit of loctite on those bolts too for added security.
post edited by martymexico - 2025/11/02 08:59:38
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PartTimeMK2
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Re: Marks Midnight 2dr 79 Mk2 RS2000 resto
2025/10/31 19:14:59
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Yah the other 5 have Loctite on them which will be fun when taking them out tomorrow if I manage to get longer ones  . Since I lucked out with the bolts I pivoted to my box of goodies. Figured I'd start on the number plate - so the hardware got some electroplating then it went back together.   Tried some of the bright zinc additive for the pin, made it a lot easier to polish up, so I think for the rest of the bits I'll add a few drops just to make my life easier. I actually thought ahead with this one and had two nice new Allen key dome heads to attach it back to the car.  and just because Marty asked, here is a nice shot of the new hardware on the bonnet safety latch . 
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