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Welcome jarel looks like it is a very nice car. Is it a us model ?curious has big bumberetts like us version. The valve adjustment should be checked and adjusted every 15000 miles the clearence is .004 thousand of a inch .0015 hundred of a millimerter a little work involved remove upper and lower valve covers (4) turn engine to z1 (tdc) remove distributor cap align rotor button with notch on distibutor housing that is no.1 cyl. Adjust upper and lower valve clearence with special feeler gauge holder and gauge. Turn engine clockwise 120 degrees to next notch on pulley no.6 cyl. Adjust valves. Turn engine another 120 degrees and so on thru firing order 1 6 2 4 3 5 also before starting drain oil at oil tank and adjust valves at room temp. Best to do this when you want to change oil any way drain engine also . Remove strainer plate on bottom of engine (8) 6mm nuts there is a screen in there look for any foriegn particales. That will give you a good idea of internal condition. 4to5 hour job well worth it. When valve cover are off check to see if any cyl. Head studs are broken espically on bottom(exhaust) those year engines 3.0 had problems with that look for 10 mm allen nuts lying in valve cover area look at studs with flashlight (24) studs 4 per cyl. If any are broken do not drive car you may burn cyl. Head or cyl. That can be expensive. Good luck with your new car regards tom
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