Blackstone BSI Spring Injection Diesel
Object ID4129
Works No
Accession NoIF:2012:153
StatusOn Display
Category Engine
Collection IDInternal Fire Core Collection
Made ByBlackstone and Co. Ltd
Made InStamford, England
DescriptionSingle cylinder horizontal diesel engine with Blackstone patent spring injection.
LocationBlackstone Pump Room (Hall 5)

First run of the engine.


Supplied to Joseph Turney & Sons Ltd, Aston, Birmingham.

14hp at 280 rpm

Fitted with three duplex rings (G/13535) on 18th December, 1931

Conservation/ Maintenance History

On arrival a check revealed that the air start equipment is missing along with main bearing ring oilers and cylinder quill feeds.

Notes from Tyne & Wear reveal that the engine had been converted to start from a Crossley 2hp petrol engine using countershaft and clutch.


The engine had been fitted with a replacement liner but the work was incomplete. The liner required removal and a missing front seal fitting. Drillings for the quills were required and new quills fabricated.

New piston rings were fitted

A new pump plunger was fabricated

Sideshaft bent probably as a result of improper slinging at some point, now straightened and checked.

The big-end was also found to be damaged with distortion in both halves.


Oil film on water in tank so head/liner pulled. Liner nuts all loose, faces cleaned and re-assembled. Big end shows 0.004" ovality. Checking valve timing showed that the exhaust cam profile has been modified resulting in the opening being reduced by around 45 deg. Cam adjusted on sideshaft to give proper overlap which leaves exhaust opening late but engine running better.

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