Enthusiasts looking to buy a used Nissan Skyline would normally have a checklist, mental or written, of things to look out for in a car they are checking out. These would include looking for oil leaks around the engine, transmission and differentials. Torn boots indicating poor maintenance of the CV joints, rust spots, sensor checks and suspension checks are also part of inspecting a used car.
Without a doubt, the most important component to check when you buy a used Nissan Skyline is the car's engine. This is specially true with the top-of-the line RB26DETT that powers the Nissan GTRs up to the R34. Most buyers know that they should do a compression check (with values of 150 and above indicating a healthy engine) and looking at the condition of the twin turbochargers, specially the rear unit, which need to be replaced at about 100,000 miles. But there are also other non-obvious items that need to be checked even if they seem so trivial as to be ignored or left for another time. The following things, believe or not, have been proven to cause engine failures: