he is correct on everything. the main way to eliminate all this is to get gauges, edge cts or scangauge2. your oil cooler delta needs to stay between 5 and 15*. anything more can lead to egr problems. the cooant needs to be maintained. put on a coolant filter and either change the gold coolant every 50k or flush that and put in some good cat ec-1 rated elc. if you plan on using a tuner, put on 4in exhaust system and get an sct x3 tuner and get it custom tuned. if you turn up the power, an egr delete is a must and keeping the boost under 28psi is important too. if you have arp head studs, you are good to go and can really turn her up.