Hand-Built Engines
CRAFTED WITH PRECISION & EXPERISE
The Engine Shed is a focal point of the company. Within a temperature and pressure-controlled environment, all engines are hand-assembled using only the finest components, many of which have been designed and developed in-house. This isn't a production line operation – every engine that leaves our workshop has been meticulously built by skilled technicians who understand that precision at the assembly stage is what separates a reliable engine from one that fails prematurely. We control every variable, from torque specifications and bearing clearances to ring gaps and surface finishes, ensuring that each build meets our exacting standards.
Whether you're looking for a stock rebuild to factory specifications, a fast road engine with improved reliability and power, or a full-blown race engine designed to withstand extreme conditions, we have the expertise and facilities to deliver. Our engine builds range from straightforward refreshes and gasket replacements through to complete ground-up builds featuring forged internals, upgraded turbochargers, uprated fuel systems, and custom camshaft profiles. We work closely with leading component manufacturers and draw on decades of combined experience to specify the right parts for your application – because there's no point fitting components that won't work together or aren't suited to how you'll actually use the car.
The Engine Team
A dedicated team of specialists monitors quality control to the highest levels. Gearboxes and differential units are also trialled and tested in the same area. Scooby Clinic has developed some of the most powerful Subaru Boxer engines ever produced in the UK and acts as a resource centre for many other tuners both in the UK and abroad.
Every engine build is subjected to rigorous quality control processes before it ever fires up. We carry out detailed pre-assembly checks, verify all clearances and tolerances, and ensure proper lubrication of critical components during the build process. Once assembled, engines are run-in and tested under controlled conditions, checking oil pressure, compression, and overall mechanical health before installation. We also provide comprehensive documentation of the build, including torque settings, component specifications, and running-in procedures, so you have a complete record of exactly what's inside your engine. It's this level of care and attention to detail that ensures our engine builds not only make power, but do so reliably for years to come.
Discuss your requirements with an experienced member of our team.
Brands we work with
Bespoke Engine Builds
We can tailor a bespoke engine build to suit your budget and performance needs. Speak to a member of our team or arrange a consultation to discuss your requirements.
Wiring Looms
Reworks of engine looms are now available, typically when a Newage engine is being transplanted to a classic including AVCS and/or Newage coil pack add-on looms as needed.
Engine looms can also be made from scratch. They are made using the OEM connectors harvested from the donor loom, and new terminals and seals but are far cheaper than a full custom loom.
Clinical Performance
NO PROBLEM
Own a performance vehicle that isn't a Subaru? No problem! Our clinical performance team has the experience and technical abilities to work on most performance vehicles.
Michael Cross
Mar 2, 2026
Simply outstanding. From service, attention to detail, knowledge and advice offered I am absolutely amazed at what I experienced when my car was with Scoobyclinic. Assisting in diagnosing issues, replacing parts and dyno running to ensure optimum running, and mapping to completely transform the car and how it drives. I drove in after a bad experience elsewhere - but now drive away in a car I am happy with, and a garage I will continue to use and recommended to any. Thank you all for the help with my car!
John Carmichael
Jan 24, 2026
Not limited to just scoobies, Mark at Scooby Clinic rebuilt my Toyota 2ZZ-GE engine, I would highly recommend Kev and his crew for your project 10/10
Joseph Carey
Jan 16, 2026
These guys will take care of you and your car. The customer service is on point - they are clear with what they are doing, how long it will take and the estimated cost. They know their stuff and work to a very high quality, You won’t be upsold or messed around. If you bring your pride and joy here you can be assured it will get what it needs.
Josh Lewins
Aug 12, 2024
Ever since owning a Subaru I've always taken it staight to these guys if I need any work or simply some advice. After a recent accident, they repaired my car to a super high standard I couldn't have asked for more! The best subaru specialist in the UK