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Category Archives: Blog

2007 Porsche 911 Carrera S M97 3.8L Engine Rebuild

This is a 2007 Porsche 911 Carrera S engine rebuild performed last summer. Luxury auto dealer contacted us with an inquiry and consultation inquiry. They had a beautiful 911 Carrera on the lot. The car ran great without any sign of problems. One day upon engine start-up there was white smoke from the driver tailpipe […]


2009 Aston Martin Vantage V8 engine rebuild

I would like to document an engine rebuild I did last summer on a 2009 Aston Martin Vantage V8 4.7. Engine was seized due to oil starvation and spun main bearings. Even with all bolts loose on the main bearing girdle and me hanging on a 3 foot breaker bar off the crank pulley it […]


2009 Jaguar XF Supercharged AJ34S engine rebuild

STORY: Local luxury car dealership contacted us regarding an engine rebuild for a 2009 Jaguar XF, supercharged model. The engine starved of oil, developed a major rod knock, and spun several main bearings. Complete engine rebuild was in order. Cylinder bores were severely scored and distorted due to lack of lubrication. Custom CP pistons were […]


SR20DET HKS 264 Step 2 camshaft repair

Story: This camshaft was purchased new by a customer and installed in a high horsepower SR20DET engine built for drifting purposes. Original cause of failure was not clearly determined. Camshaft sprocket retaining bolt may have not been torqued down properly leading to shearing of the camshaft locating pin, camshaft damage, as well as bent engine […]


ARP SR20DET Camshaft Cap Bolt Upgrade Kit

SR20DET Camshaft Cap Bolt Upgrade Kit ABOUT ARP ARP is the world leader in fastener technology trusted by the industry’s leading engine builders. When it comes to your build don’t overlook one of the most important parts. Go with the best! Camshaft positioning is critical on overhead camshaft engines and ARP makes sure that the […]


Hyundai Genesis Coupe 2.0T Theta Engine Build

Disassembly and brief look the engine in stock form can be found in this blog entry:  http://pretuning.com/2011/10/hyundai-genesis-coupe-2-0t-4b11-engine-disassembly-and-evaluation/   This is a Hyundai Genesis Coupe engine build I recently completed. As of right now, there are very few performance parts available for the engine. Although the Hyundai Theta 2.0 engine is very similar to the Mitsubishi […]


Rebuilding turbos for a nationally ranked auto cross driver

This is a video provided by one of our clients. Mike Gregg races a Nissan 240SX with an SR20DET engine. Mike’s engine suffered oil starvation failure and the ball bearing GT2860R turbocharger failed. Mike sent to us his GT2860R and a T28 turbos for conversions to journal bearing setup. Below is a video of the […]


Z32 Nissan 300ZX T25 Turbocharger Rebuild Service

PRE Tuning offers rebuilds of Nissan 300ZX T25 turbochargers. These turbos were rebuilt with all new bearings, seals, and o-rings. All bearing and turbine shaft clearances are measured using micrometers and bore gauges. Bearings housing is cleaned prior to inspection. When excessive wear is determined, it is rehoned to accept an oversized turbine shaft bearing. […]


2007 Subaru Impreza STI turbo rebuild IHI VF43

This is an IHI VF43 turbocharger removed from a 2007 Subaru Impreza STI. The turbo was in decent condition to begin with and only needed a complete rebuild kit for the overhaul. Customer complained of minor oil consumption and smoking from the exhaust pipe. Inspection revealed a worn out turbine shaft seal. Complete rebuild was […]


Caterpillar Industrial Turbo Wastegate Repair

This is a project that came to us yesterday. This turbocharger was removed from an industrial turbo diesel Caterpillar engine. This turbo has a twin scroll turbine housing and utilizes 2 wastegate valves. After heavy use the turbo wastegate valve failed completely and broke off from the flapper arm. This caused the engine to produce […]


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