Hello there helpful people! I have an 89 tona with the 2.5l turbo. The other weekend i started to blow smoke and smelt like oil. Checked my oil and was very low. Then ran a compression test nearly sh*t a brick. 89-92psi all the way across. I tore the motor apart and checked the gap on the rings, .028-.032 on all 8 compression rings(my friend gapped the rings without measuring...). Got my piston measured and it's .020 over. So i got new rings and they all measure .026 gap right out of the box... I was told from a machine shop that the machine shop that did the bore on my block may have gone .021 or .022 over.. but instinsted that .026 ring gap should not cause that much of a drop if a drop at all in compression... Head gasket is also brand spankin new as well as arp head bolts(torqued down to 80ft lbs with the grease on the washers as they gave in the box) came timing and ingition timing done at same time, crank and intermediate shaft line up and cam gear hole is lined up with the 3rd notch on valve cover. And the test was performed wet. I am going to do a dry and the wet test to see if there is any change in results.. as well as retard or and then advance cam timing by one tooth to see changes... any suggestions would be great!
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