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TDS »
https://forums.nicoclub.com/tds-u28899.html
Fri Mar 07, 2008 9:13 am
Don't rely on what people say.
Look for oil leaks around the engine block, oil pan, valve coverCheck the spark plugs and see if they are covered in black carbon build upOpen the distributor cap and look at the condition insideRemove the valve cover and look inside to get a sense of the engine's condition
These sorts of things will give you an idea of how well the owner took care of the engine. It will not guarantee that its in top shape but it helps.
There are other things to look for but you can make a checklist.