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Re: DJ2.1 Rebuild
Posted: 14 Sep 2022, 22:02
by maxstu
Cheers Steve,
I may be bit of a crank. But lm not a crank person.
Yet the crank journals look good to my eye. Will post more photos tomorrow.
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 08:23
by Stesaw
Might be best to get the crank polished, theres something in my head about using a penny to check the journals.
But either way the Bentley books pretty good at giving all the info.
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 10:55
by maxstu
Yes. Scratch it with a copper penny. Very technical.
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 11:04
by Smiffo
There are some good vids on youtube about measuring crank journals and bearings.
One mentioned three different points with micrometer at 120 degrees from each other. Then you know ovality etc.
Never done it, and a vid speaks a thousand words
example below - different engine, but same principle I guess.
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 11:38
by maxstu
Cheers matey.
That's my evening set...
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 17:54
by weimarbus
Hi Stu, I have a micrometer big enough if you are passing, I even have coffee and cake
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 18:04
by Stesaw
maxstu wrote: ↑15 Sep 2022, 10:55
Yes. Scratch it with a copper penny. Very technical.
Only the best
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 18:31
by maxstu
weimarbus wrote: ↑15 Sep 2022, 17:54
Hi Stu, I have a micrometer big enough if you are passing, I even have coffee and cake
Hi Andrew,
We hope you and family are well?
Forget about the micrometer, Andrew! Im more interested in cake and coffee
Im not travelling from Margate to Chic any more. My sister sold her yacht in June. So end of another era.
l may sling a leg over the motorcycle and pop down for a chinwag, though.
I really do appreciate your offer. Yet there is rumour of a meet being organised by Putney at the Fox & Goose near Guildford. Fancy that?
Regards
Stuart
Re: DJ2.1 Rebuild
Posted: 15 Sep 2022, 19:29
by tobydog
Good luck with the leg irons
Just bought some micrometers for the office including a couple of digital 25-50's, be easy to borrow a 50-75....
I'd nip over and see my very good
OL mate and use one of these for measuring stuff:
https://www.hexagonmi.com/en-gb/product ... s/global-s
https://www.nikonmetrology.com/en-us/vi ... v-vma-4540
https://www.taylor-hobson.com/-/media/a ... 8c9677b3a1
And they're all calibrated
Used one of these only last Tuesday:
https://mmi-direct.com/machine/used-coo ... -300-dcc-c
Re: DJ2.1 Rebuild
Posted: 16 Sep 2022, 09:02
by Smiffo
Did you watch the vids last night, Stuart?
Did they help?
Re: DJ2.1 Rebuild
Posted: 16 Sep 2022, 09:36
by Stesaw
I reckon he was dreaming about the coffee and cake
Re: DJ2.1 Rebuild
Posted: 16 Sep 2022, 09:44
by maxstu
Very much so, thanks.
Im on the hunt for a proper micrometer instead of using a sliding vernier gauge. Yet so far only found what l need on eBay with four day delivery. Getting technical, eh?
But likely all academic because lve decided to give crank, cam and cases to a firm in Kent to vapour clean (cases only) first. Then give me a report on condition of crank, casings and cam, with true nominal readings. I will pass on the conrods too.
From there l can start buying for the rebuild.
I not going to skimp on costs. Yet l do have a budget.
From a kind fellow forum user nearby lve sourced two AMC heads with newly fitted valves (lapped) and springs all ready to go.
If the crank is good will get new bearing shells. Same for cam. I may well get a new set of conrods. Even a new set of SS/MV cylinder liners and pistons. Resell the pistons
and use the DJ pistons. If they are compatible? Checking to see if DJ/MV/SS share same gudgeon pins.
More photos later today.
Regards
Stuart
Re: DJ2.1 Rebuild
Posted: 16 Sep 2022, 09:46
by maxstu
Stesaw wrote: ↑16 Sep 2022, 09:36
I reckon he was dreaming about the coffee and cake
Tis my favourite mid afternoon tiffin.
Are you spying on me? You're supposed to be in boney jockland
Re: DJ2.1 Rebuild
Posted: 16 Sep 2022, 10:46
by Smiffo
maxstu wrote: ↑16 Sep 2022, 09:44
Very much so, thanks.
Im on the hunt for a proper micrometer instead of using a sliding vernier gauge. Yet so far only found what l need on eBay with four day delivery. Getting technical, eh?
But likely all academic because lve decided to give crank, cam and cases to a firm in Kent to vapour clean (cases only) first. Then give me a report on condition of crank, casings and cam, with true nominal readings. I will pass on the conrods too.
From there l can start buying for the rebuild.
I not going to skimp on costs. Yet l do have a budget.
From a kind fellow forum user nearby lve sourced two AMC heads with newly fitted valves (lapped) and springs all ready to go.
If the crank is good will get new bearing shells. Same for cam. I may well get a new set of conrods. Even a new set of SS/MV cylinder liners and pistons. Resell the pistons
and use the DJ pistons. If they are compatible? Checking to see if DJ/MV/SS share same gudgeon pins.
More photos later today.
Regards
Stuart
What a result on those heads
Stesaw linked me to a DJ with one head and one piston missing, so I've left it be for now.
Maybe I should get it and source the rest over time - certainly no rush my end at the moment.
Re: DJ2.1 Rebuild
Posted: 16 Sep 2022, 10:58
by maxstu
Finding heads not a problem. My old ones will go up for sale at some stage l suspect. A decent used and matching in weight DJ piston is another matter.