derik

I have Pajero with 3.5 liter engine and some engine missing has been noticed lately and sent to Habtoor and they did not find any missing as its not that big noticeable. I ask them to do the compression test and result was showing low reading in one cylinder. Below are the dry and wet readings. Please suggest how to fix this one cylinder without opening the engine (if possible). Dry/Wet Engine Compression Test Readings: 1) 140/230 | 2) 150/250 3) 150/230 | 4) 40/90 5) 170/230 | 6) 140/250