Client Case Study


The 6 cylinder Detroit Diesel two stroke engine shown previously was circa 1987, and installed into a large London chemical factory. It had given almost 30 years of good service, when a limescale blockage in the cooling line slowed down the raw cooling water; and finally overcooked the engine; and with the site’s insurers actually testing it; It seriously over heated, snapping off & throwing 2 connecting rods right out through the side of the cylinder block!



Everyone said ah-well thats completely scrap!     But no that wasn’t the case.
After being quoted for a completely new pumping set, (approximately £48,000) the customer asked for a remanufacture.

Unusually Being a Detroit Diesel

The engine service speed of 2,350 rpm, doesn’t seem a lot compared to other 4 stroke engines, but its important to remember, that this is a two stroke diesel; and this 6 cylinder is the equivalent to a 12 cylinder four stroke engine.

To achieve the 420 bhp, a turbocharger couples onto and assists the standard Rootes blower (Supercharger), pushing up the inlet charge pressures to quite extreme levels, but in 30 years of service a well proven performer.

We were able to replace the cylinder block, the crankshaft and all of the conn rods and simply remanufactured the complete engine and to BS AU257. fully testing in on our Heenan Froude dynamometer.

Within three weeks it was refitted to its plinth; where it was flow tested for over an hour!
Four years ago now, the whole job was carried out for a cost of £9,700 + Vat.

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