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Originally Posted by mbzman
Which engine is more reliable? If the '86 is exhibiting valve train noise could it be simply due to the car having been sitting for so long and it needing to build up oil pressure?
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Both engines have their strengths and weaknesses - lots of info in the archives. An 80k mile 103 motor shouldn't have a tick - which would reflect some sort of abuse or odometer shenanigans. A quiet running, and cold starting, engine is just about the most important thing to look for.