This topic contains 6 replies, has 3 voices, and was last updated by 
EricTheCarGuy 7 months, 2 weeks ago.
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Topic
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2006 Dodge Caravan with low miles.
Compression on cylinder #2 (Pass Side front) is 150 cold and 150 hot
Compression on cylinder #4 (middle front) is 135 cold and 150 hot
Compression on cylinder #6 (Driver side front) is 45 cold and 150 hot.Car runs great, gets get gas mileage, oil color and texture normal. Coolant is normal.
What do you think. Normal?
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Cyl #1 – 150 Engine Warm
Cyl #3 – 150 Engine Warm
Cyl #5 – 153 Engine Warm (rear driver side) not tested hotDoesn’t seem to be consuming oil or water
Compression tested ~150 psi on all cylinders today (cold)
Unclear why the low reading several days ago. Perhaps a sticking valve or ring.
Hello, Randy! Did you have a P0306 and that’s why you tested compression, or were you checking for your own peace of mind? As you mentioned, it could have been a sticky valve which usually stems from carbon buildup. You can try using some seafoam to clean the carbon out.
Compression test really don’t tell you much. A leak down test is much more informative in my view. I only do compression tests when looking for a dead cylinder. If you don’t have a misfire, or any codes, and the engine runs fine, you’re probably fine. The discrepancies are likely due to testing errors.
Thanks.
I just drove the vehicle on a 2000 mile road trip with no issues. Gas mileage as expected or slightly better for a V6 and a loaded vehicle at approximately 4600lb gross.
Seems to have been a testing failure rather than an engine component failure.Thank you for the update. Glad it worked out.
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