29/06/2021
Subaru Impreza now running like a sewing machine.
-previous engine lost compression across multiple cylinders and was forcing combustion gases from all cylinders into the coolant system.
-customer made the choice to get another engine with this engine being faulty across all cylinders.
-due to being falsely advertised, the new engine wasn't quite right, with only the main engine actually being compatible. So some work was involved in swapping literally every component from the original engine over to the new.
-this included coolant hard lines & pipes, fuel pipes, breather system, throttle bodies, inlet manifold, injectors, inlet butterfly valves, intercooler, wiring loom, flywheel, multiple attachments and bracketry, alternator, air con pump, auxillary belt tensioners & belts and everything else I've forgotten.
-doing this to a 15 year old engine resulted in several broken studs and bolts that had to be drilled out or removed by other means, and any damaged threads retapped and repaired.
-nearly all mating surfaces also required cleaning up and several needed refacing due to age and pitting.
-whilst the engine was out, a complete new cam belt kit was fitted including all 5 guide pulleys and new tensioner. A new water pump was also fitted with fresh coolant, as was a new genuine Exedy OEM HD clutch kit and clutch release bearing. A new set of spark plugs were fitted and an oil & filter change also carried out, as would be expected.
-due to some compatibility issues the decision was also made to remove and bypass the EGR system along with the secondary air injection system. These are common modifications to these models as they are common failure points anyway. No worries there now, so win win. 🙂
-so, it all went back together and ran perfectly. Sounds well, pulls well, and drives like a scooby should 😁