Well there isn't very many "specialists" per say. I've used... ah... none.Joshbates wrote:Yeh it's a 6.2 non turbo. Where is the cheapest place to buy parts for them. I'm in Adelaide so I'm not sure if there are any chev diesel specialists down here in sa. Finding it hard to find filters etc.
But of the few that Stormtrooper mentioned, there are opportunities for good advice. The oil filters are cheap and sourced from any speed shop, ask for bits like oil filters and timing seals spec is Holden Surburban 1992 - 1994. Other things like water pumps and thermostats there's a lot of different models and styles, rear main seals there's one for 6.2's and two for 6.5's.
Performance wise for a 6.2, providing you've got a good stable base to work with no leaks, cracks, knocks, corrosion or overheating issues. Get your injectors done, power and fuel economy are the primary concern, but you don't want diesel knock to kill your engine. Make sure your IP is in good order and use 2ST oil in the fuel, check that the timing and fuel delivery are good for your airflow. Before you set the IP, DO ALL the airflow mods required. Clean non-convoluted intake and a crisp 3" exhaust. The exhaust should go black and smokey when WOT, and not too much before. All should have the rear of heads water extraction mod also.
Best thing to do is realise that these engines are old school, and have issues. They're not like Jap diesels. The IP and injectors have a relatively short lifespan and were designed to be serviced at every 100K MILES. Using the 2ST will extend this time schedule a bit more. Almost everything is sealed with CopperMax, not gaskets. They have lousy oil pressure when hot and virtually zero at idle so keep the oil fresh, and use the good old school oil with good detergents like Shell Rimula X or Helix Diesel, with the correct CH code, not fancy synthetic crap. They like being stinking hot in summer, so keep your hoses in good nick. There's no HP until you rev it up if N/A, they like being worked hard and it's not such a good idea to turbo a 6.2 so, REV IT UP!
Go online and read all you can find in the US forums, and get an exercise book. From one cover write all the ideas you read about in the forums and organise a to do list. Flip the book and from the other cover write all the parts that you use, numbers, specifications and sources for everything- belts; hoses; seals; oils; thermostats; modded parts and all these such things. Then you've a reference to the buildup work you're doing.