Originally Posted by
SidCoronel
Buying a secondhand car requires a lot of experience, skills needed to buy a diesel car is different from buying a petrol car.
Bring a very good diesel mechanic, bring an OBD2 scanner if you can borrow one.
Even if this is a 2014 model, it pays to be thorough in your inspection.
Some tips, but not even half of what you need to check:
1 Use an OBD check scanner
2 Over clean engine bay too good to be true, may be hiding leaks
3 Check engine bay alignment, should be straight vs crashes
4 Check underneath the engine, for leaks
5 check engine coolant, clear bright color... Not oily, else engine gasket leak
6 Check brake fluid tank for leaks or low levels
7 Power steering tank, clear bright color, good level
8 check engine oil , underneath the oil cap... frothy milkshake like oil is sign of gasket leak, check also inside of engine hole, check also the dipstick... vs metal parts, check also ATF dipstick
9 check hoses and belts vs bulging, cracks, brittleness, leaks... intake manifold hose vs oil!
10 Cool the engine, START and watch exhaust ... vs blue smoke (valve seal leaking to combustion chamber, worn piston rings)... then rev the car... vs white smoke (head gasket leak)
11 Back to engine bay, START the car, watch engine shake, too much... engine support is worn out , then check for leaks again... while engine running... vs pressure leaks
12 Open oil cap which engine running, check vs pulsating air or vacuum or smoke... vs blow by, worn piston rings
13 Check for excessive engine vibrations, erratic idling, no loud ticks
14 Repeat engine checks in both hot and cold engine
15 Listen as car is shut vs shaking and noise. Close hood... does it close well?
Did i already say bring a diesel mechanic?
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2023 Toyota Wigo