>> I got a 1989 Cressida recently it has done 190,000 kilometres I have no
>>> idea when timing belt and plugs have been changed.
>>> If I removed a plug could I tell from visual inspection if they needed
>>> changing or is the computer clever enough to tell when they are a >>> problem?
>>> I am hoping that the belt has been changed at the correct time which
>>> would give me another 130,000 kilometres.
>>
>> Look for a sticker somewhere in the engine compartment, starting with the
>> timing belt cover and radiator support that indicates when the timing
>> belt was replaced. If there is no sticker, then you will have to remove
>> the top of the timing cover to check the condition of the timing belt.
>> The replacement interval is 100,000 Km.
>>
>> If you remove a spark plug, you should be able to tell from visual
>> inspection whether or not they need replacement. Platinum spark plugs
>> have a life of approximately 100,000 Km.
>>
>> Look for signs of oil collecting in the valley between the camshaft >> towers.
> oops I was working on 100,000 miles for plugs and belt (dont know where I
> got that from )(that is why the funny klm figures)
> Ordinary plugs I can tell wear. It was the unknown platinum that I was
> unsure about I have since looked at a new one so I may be able to tell
> wear when I look
The replacement interval for spark plugs and timing belt is 60,000 miles.
Evaluate the condition of platinum spark plugs the same way as you would for conventional plugs.