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Special Sports head torque settings

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Eric990j
Posts: 18
Joined: Sun Sep 18, 2016 8:19 am
Location: Kent

Special Sports head torque settings

Post by Eric990j » Wed Mar 06, 2019 1:03 pm

Hi all

Could anyone let me know the tourque settings for a 1951 special sports cylinder head. I’ve seen lots of data when I searched but not the figures I need. Is there a manual with the data I should print out?

Best regards

Eric

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clevitt
Posts: 70
Joined: Wed May 18, 2016 1:02 pm
Location: West Hertfordshire

Re: Special Sports head torque settings

Post by clevitt » Wed Mar 06, 2019 3:42 pm

Hi Eric,
I researched this question when refitting my own cylinder head two years ago, and found various figures between 26 and 50 lb/ft. The lower end figures were probably for the DB18 Saloon / Consort, which uses 3/8 " dia bolts rather than the 7/16" used on the Special Sports. In the end, I used the figures in David Beale's workshop manual of 43/67 lb/ft , and chose a lower end figure of 45, since when there have been no problems with the cylinder head.
Chris

Eric990j
Posts: 18
Joined: Sun Sep 18, 2016 8:19 am
Location: Kent

Re: Special Sports head torque settings

Post by Eric990j » Wed Mar 06, 2019 7:09 pm

Thank you very much Chris, it also puts my mind at rest as I was finding many different results and could not work out what was what ! I should get a copy of David’s workshop manual.

Best regards

Eric

grahamemmett
Posts: 501
Joined: Mon Feb 08, 2016 8:12 pm
Location: Northwich, Cheshire

Re: Special Sports head torque settings

Post by grahamemmett » Thu Mar 07, 2019 12:04 am

Eric, you’ll find all the same information on www.db18.org
Go to the Document Store page, then look down the Repairs Document List until you see the Repair Manual. Click on that and the manual is displayed.
Graham Emmett
Northwich, Cheshire
DB18 1949 LCV522 (Yes that one with the P100s)
https://www.db18.org

Eric990j
Posts: 18
Joined: Sun Sep 18, 2016 8:19 am
Location: Kent

Re: Special Sports head torque settings

Post by Eric990j » Tue Mar 19, 2019 11:52 pm

Hi guys, just thought I would update you. The head is back on and I also took the time to polish a few bits while I was waiting for the radiator! I was umming if I needed to do the radiator but read on the forum it’s a must if you had overheating, that was correct advice once it was opened. Oh well she should run well by the weekend hopefully.
A bit more spannering to do.....

Db n j
Posts: 216
Joined: Sun Mar 13, 2016 8:55 am

Re: Special Sports head torque settings

Post by Db n j » Wed Mar 20, 2019 7:33 am

Eric,

Just wondered if you had flushed the block ?

If the radiator is blocked, there is a good chance that the block is silted up as well.

The engine slopes backwards, so the silt tends to go that way too.

It's easy to do with the head off, but can still be done now. This means removing the 4 core plugs on the carb side, and the drain tap. Push water through the pipe from the thermostat, and rod through the holes.

You will take ages to get clear water.

Good luck

Stan Thomas
Posts: 472
Joined: Sat Feb 13, 2016 2:14 pm
Location: Penkridge. Staffs.

Re: Special Sports head torque settings

Post by Stan Thomas » Thu Mar 21, 2019 7:25 am

Way back in the dim and distant past (when we had a proper Government and a party to replace them with) servicing and/or reconditioning the radiator was a standard part of the job when fitting a new or recon engine - as was washing down the engine bay - all for four shillings (20p) an hour.

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