Replace every 12,000 to 15,000 miles to maintain fuel efficiency.
. If the timing belt breaks, valves will hit the pistons, causing catastrophic damage. Replace every 60,000 to 90,000 miles. Cylinder Head : The manual specifies a cylinder head height between 122.50 mm and 122.70 mm Compression Ratio nissan e13 engine service manual
They worked in silence for an hour. The problem wasn't the ignition; it was deeper. A phantom vacuum leak that the smoke machine couldn't find, masked by the variable valve timing. Replace every 12,000 to 15,000 miles to maintain