Saturday, 28 February 2015

Valve clearance check: take III

Having reached the break even point, and since in the last service there was no time to measure de valve clearances, today I drove the Corolla to the workshop, let it cool down for three hours and got to work.
The 3ZZ engine ran over 55400km on LPG and 44320km after the last measurement, the present valve clearances are as follows:

- intake valves: from 0.15 to 0.25mm, measured value 0.25mm
- exhaust valves: from 0.25 to 0.35, measured value 0.30mm

The 0.25mm feeler gauge in the intake valves was quite hard to fit between the tappet and the cam lobe, the 0.35mm didn't fit in the tappet clearance in the exhaust valves, and the 0.30mm had some noticeable clearance left (compared to the 0.25 in the intake valves).
All clearances in the intake were similar, as were the clearances in the exhaust ones, there are no wild values in valves with the same function.
Next measurement in 50 thousand kilometres... with the replacement of the rocker cover gasket, it leaks a very small amount of oil near the second cylinder spark plug.

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