engine rebuild ford lehman 2725e

Dry Weight 32,000kg

Direct Drive

LOA 17m

Beam 4.8m

Min Draft 1.7m

Built at prestigious Joyce Yard.

Carpe Diem was surveyed on 7th October 2023 with no material defects noted.

Crew moved the vessel from Crinan Basin to Ardfern Marina (7nm) and reported smoke / engine overheating.

At Ardfern the water pump was found to be unserviceable and a new water pump and impeller installed.

Ford Lehman 1997

6.2L naturally aspirated

6 cylinder - Parent/Native 107mm/4.221 inch -bore

115mm stroke

136 hp

Crank Mains 76,20

Block Mains 80,44

Crank Pins 66,68

RPM 1250-2700 - 26l/ph at max revs.

Fuel Sys AA

Twin Disk MG-502

Gear Ratio 3.1ins, 32” prop, 2” ss shaft, 6-12 knots

380 cubic inch displacement

Raw water pump removed, gaskets replaced and unit refurbished.

All sections of the impeller within the raw water pump.

New brass threaded hose attachments and impeller.

02Engine Overheat - Second Trip

Second Trip

After the water pump repair we checked the engine was drawing water as part of routine start up.

We moved about 4nm travelling at 7knots / 1,200 RPM when the engine began to lose power, smoke and steam.

An emergency tow back to Ardfern Marina by RIB (rather than calling the RNLI).

Saloon seating removed

Companion way stairs removed

Repainted engine bay and room

03Engine Removal

Welded Hoist Frame

Weighing in at 467kg, the engine required a hoist to be welded and the removal of the cabinetry in the saloon and companion ways (beech and holy/oak sole).

The engine well contained about 100L of oil/water/coolant/hydraulic fluid and transmission fluid which had to be drained.

The oil drained from the engine was tested to ensure no metallic residues.

Engine subassemblies removed.

Once dry, the engine bay was degreased, steam cleaned, primed and repainted in red oxide and metal white paint.

Engine Fault Identification

Head Gasket

3/6 Cylinders

Excessive carbon

Seized piston

Fractured heat exchanger

Connecting rod and Crankshaft refurb

Valves and rockers stripped big end and camshaft bearing replaced.

Engine Rebuild

Cylinder Head Covers Removed.

Rocker Gear and Injectors removed

Injector replaced

Pushrods removed

Pistons and connecting rods removed

Cylinder liners removed

Crankshaft rotated for degrease and grinding

Bottom and crankcase removed

Main bearing and camshaft replaced

New heat exchanger, injectors and fuel nozzles.

Prices March 2024

Guarantee 8,000 hours