I have a 1988 300ZX with 43,000 miles. The timing belt was never changed. Should I change it now or wait until the 60,000 miles?

 

At that age, it would be a great idea to change it.

 

Agreed.

 

What would be the cost to replace the timing belt?

 

S***********g.com offers four timing belt kits for $75 and less. This will get you a new water pump, belt, gasket and pulley. A tedious but not difficult task.

 

Don't forget the water pump. Any kit for $75 does not include the water pump. The pump alone is $70.

 

Now. Change the timing belt every 60,000 miles or every 5 years whichever comes first. z31s have a striker engine. It’s an interference engine which means that if the timing belt breaks, the valves and pistons will strike each other. And it’ll be a costly repair job.

 

Take your pick...

 

Timing belt kit and water pump, $167.11
https://www.thezstore.com/product/66...it-84-89-300zx
https://www.thezstore.com/product/70...mp-84-89-300zx

 

From $ummit Racing comes these offerings for an '84 Nissan 300zx: