Not Ranked
Last SO block I put together leaked water into the cylinders after about 10 hrs run time. Old blocks have battle wounds that show later on and create heart ache and disasters.
Even a tear down doesn't give you all the details. Cleaning, inspection, and pressure test makes you feel somewhat more comfortable. I had mine tested at 50 psi and it still leaked.
I personally will never buy another used block for the above reasons. Besides, they are available new now.
|