You should have a voltage of around 12.6 volts. Have them replaced if they have been in the engine for more than 60k miles, and you should see improved gas mileage as well as a smoother idle. With the car off: connect the multimeter to the positive and negative battery terminals. ![]() If your maintenance schedule does not list changing the timing belt, then your engine has a timing chain which does not call for scheduled replacement.Īs to the rough idle, you probably are overdue for new spark plugs. Each recommendation includes repair and inspection intervals based on mileage or date. This is another case of lax maintenance leading to BIG repair costs. Maintenance schedule and service intervals for TOYOTA COROLLA. ![]() If your maintenance schedule lists a change of the timing belt at something like every 7 years or 100k miles (whichever comes first), you need to take that recommendation very seriously. In case you are not aware of how much a new/rebuilt transmission would cost you, think in terms of…possibly $2k, so if money is tight you will save money in the long run by spending $90-$120 every 30k miles to have the fluid (and filter) changed.Īlso, while I don’t think that your engine has a timing belt, this is something that you need to verify. When it is not done on that type of schedule, trans failure can occur any time after 90k miles, and is pretty much of a sure thing after 120k miles. If you have never had the transmission fluid changed, you need to do it now.Įven though it may not be listed in the Toyota maintenance schedule, this service needs to be done every 3 yrs or 30k miles, whichever comes first.
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