Welcome to Thurston Engineering Ltd
We're an Engineering Company in Ongar, Essex

We Are Thurston Engineering.

Thurston Engineering Ltd evolved from a business started by Eric Thurston in 1938, at Ongar Essex, and was originally set up to overhaul motor car engines.

Nearly 75 years on, the business has developed and expanded to include a wide range of allied services which we are proud to offer in today's market place.

The Best of Both Worlds

Our staff are a potent blend of craftsmen who are highly experienced in all aspects of engine reconditioning/repair and the dynamism that accompanies innovative young men raring to keep abreast of all the latest technology.

New Technology allied to Sound Experience

It is a mixture of this deep-seated knowledge and the determination to be at the forefront of new technology as and when it proves itself to be advantageous, that has been largely responsible for the enviable reputation that Thurston Engineering has accrued over the years. This approach enables the Company to offer an invaluable service to both industrial and private customers.

Specialised Work Requires Specialised Workshops

Further specialised workshops have been added over the years to accommodate larger cylinder boring machines, crankshaft grinders and many other modern machines, thus allowing the Company to expand into the heavy commercial, industrial and marine markets. Thurston Engineering is now one of the oldest established engine reconditioning firms in the country. Additionally, in conjunction with our sister company E H Thompson & Son Ltd., we are ideally situated to provide general engineering services with their 3000 hours per month machining capacity.

• Cylinder re-boring and re-sleeving up to 5" diameter and 10" long.
• Magnetic and other Non-destructive crack detection.
• Crankshaft grinding up to 4ft long and 4" stroke.
• Honing from the smallest bushes and bores up to 8" diameter.
• Line boring main bearings, camshaft bearings and various housings.
• Re-claiming connecting rods and other non-obtainable components.
• Pressure testing cylinder heads and blocks.
• Surface grinding or fly cutting of cylinder blocks, heads etc.
• Re-facing or surface grinding flywheels, clutch surfaces, brake drums and brake discs.
• Boring and fitting valve seat inserts, refacing valve seats and valves, unleaded fuel conversions, setting up valve clearances.
• Machining and fitting oversize or modified valve guides and valves.
• Hot degreasing and bead blasting.
• Overhauling, phasing and calibrating diesel fuel pumps and injectors.
• Engine re-building and bench testing when required.
• Tuning engines on the Rolling Road to achieve best power, fuel consumption and exhaust emissions.
• Argon-arc welding aluminium cylinder blocks, heads and components and pressure testing where necessary.
• Gas/Mig/Tig/Arc welding of various components.
• Manufacturing on CNC machines and by turning, milling, etc. to produce unobtainable parts.