Unfortunately they may have not installed the oil control rings properly considering the mess they left you with. They are supposed to be clocked at a certain angle to each other and the expander ring ends must not overlap each other.
You need special tools to install the pistons such as ring compressors. You maybe better off finding someone to do this for you if you do not have experience doing this.
They need to inspect everything before parts are ordered. If the bore is oversize or not machined properly you may need to have the block machined and install a larger diameter piston and rings.
You may want to try a different PVC valve. They have different size holes which controls the amount of vacuum flow through them.
You need special tools to install the pistons such as ring compressors. You maybe better off finding someone to do this for you if you do not have experience doing this.
They need to inspect everything before parts are ordered. If the bore is oversize or not machined properly you may need to have the block machined and install a larger diameter piston and rings.
You may want to try a different PVC valve. They have different size holes which controls the amount of vacuum flow through them.
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