G
Guest
·One thing I failed to mention yesterday was I only cranked the engine three-four times (don't remember - but I was consistent across all cylinders) to get my 170lb average across the six good cylinders. Today, I acccidently squirted oil in #6 instead of #7, and cranked it until the compression stopped boosting. I think the reading went to 220 lbs or something. I don't know if this means anything.
Anyway, I just did a wet compression test on my bad #2/7 cylinders. These were the results from the dry test yesterday: (37k mile boss 351): (1) 180: (2)95: (3) 175: (4) 175: (5) 170: (6) 175: (7) 100: (8) 160
I liberally squirted oil in the sparkplug holes (that's a tough one...had to use that 1/2" clear tubing from my gear oil lube pump), so I don't know if I got too much oil in there or not. Anyway, both #2/7 pumped up to around 130 lbs (that is with me cranking away until she stopped). Whenever I would clear the guage and retry, the poundage would always drop a few lbs. So, after a few tries, I was already below 120 lbs.
I was hoping my readings were going to be identical, or only slightly higher. I guess the leakdown test is in order. What do you guys think? Could it be bad rings with only 30-35lb jump in the bad cylinders after a shot of oil? Thanks again.
Anyway, I just did a wet compression test on my bad #2/7 cylinders. These were the results from the dry test yesterday: (37k mile boss 351): (1) 180: (2)95: (3) 175: (4) 175: (5) 170: (6) 175: (7) 100: (8) 160
I liberally squirted oil in the sparkplug holes (that's a tough one...had to use that 1/2" clear tubing from my gear oil lube pump), so I don't know if I got too much oil in there or not. Anyway, both #2/7 pumped up to around 130 lbs (that is with me cranking away until she stopped). Whenever I would clear the guage and retry, the poundage would always drop a few lbs. So, after a few tries, I was already below 120 lbs.
I was hoping my readings were going to be identical, or only slightly higher. I guess the leakdown test is in order. What do you guys think? Could it be bad rings with only 30-35lb jump in the bad cylinders after a shot of oil? Thanks again.