Timing belt tensioner & spark plug question

[Dave]

Be sure to replace that idler while you are in there.  I carefully replaced the timing belt on my son's 4000S and didn't replace the idler.  Guess what failed 3 months later?
Dave

>> I need some maintenance work on my car including timing belt, water pump 
>> and lifters, and I was wondering if there is also a separate tensioner 
>> on this engine. It's an 88 5ktq. I was told it's part of the water pump 
>> which I am changing anyway.
>  
>

Correct.  There is an idler pulley you should replace, though.  Also, 
most people replace the front crank seal while it's exposed.