The engine quit running while I was driving down the road. Car has 73,000 miles. I have never changed the timing belt, which is what I suspect is the problem. If the timing belt broke, what kind of damage will I be looking at?
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Re: 1984 Nissan 300zx
The timing belt should be changed every 60,000 miles.
your engine is an interference engine, which means if the timing belt breaks or skips, the valves will hit the pistons.
if your belt broke you will have bent valves. so the heads will need to come off and bent valves replaced.
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The Quest has a non interference engine meaning that should the belt break the engine would just die without breaking anything. Nissan recommends 105K for changing but that depends on the way the vehicle was driven (driving habits), road conditions etc. If driving on roads for e.g. that are hilly, it labors the engine more thus shortens the lifespan of the belt according to mfg.
the timing can be adjusted via the crank angle sensor... under the hood on the upper right side of the engine there is a metal piece with a mitsubishi symbol on it. it has 3 screws visible and a plug. undo the screws and depending on where it is now twist it so that it is slightly to the left of center about 1.5millimeters off center. the crank angle sensor is not a way to majorly adjust the timing just minor adjustments. i assume the car is running now so its probably severely advanced you can concievably fiddle with it to get the smoothest idle out of the car. between 650 and 800 is good
Check your mass airflow meter. If it's bad, at least on my 1990 300ZX, the car won't rev over 2400RPM (it's a safeguard built into the ECU of the car). Grab one from a scrapyard and swap it in and see if that fixes the issue.