L300 V6-3.0L VIN R (2001)
4. Insert a compression gauge bar kit Gauge Bar Set SA9127E into the spark plug hole.
5. Fully open throttle.
IMPORTANT: Always use a fully charged battery to obtain engine revolutions of 250 rpm minimum. Do not crank the engine for more than 15
seconds.
6. While cranking engine, measure compression. The cylinder should puff or compression gauge needle should bounce a minimum of 10 times.
IMPORTANT: All measurements must be completed in as short a time as possible. Check low cylinders and make sure a minimum of 10 puffs are
obtained prior to reading the gauge.
7. Repeat the previous steps for each cylinder.
IMPORTANT: No compression in two or more cylinders is an indication of damaged timing chain sprockets, camshaft(s), crankshaft key or pins.
The minimum compression in any one cylinder should not be less than 70 percent of the highest cylinder. No cylinder should read less than 690 kPa
(100 psi).
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Normal Compression: Builds up quickly and evenly to specification in each cylinder.
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Low Compression: Damaged piston, ring(s), valve(s), or head gasket.
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High Compression: Carbon on pistons/combustion chamber.
IMPORTANT: A cylinder leakage test can be performed to further determine location of compression leakage if one or more cylinders are
extremely low.
