Rupunzell
Bernice Loui
Block bores, pistons and rings are specifically fitted as a system. If any item is mixed up or tolerances go beyond what was designed in, there will be problem from moderate to serious engine failure. Not so easy to measure bore diameter as it requires precision measuring tools with skills and knowledge to use them properly. Pistons might not be round at room temperature as they expand to fit the cylinder bore. Common method to check piston to bore clearance is by feeler gauge, but this is not always accurate.
Piston rings wear into the bore they live in. If they are removed then installed into another bore, they will be mis-matched causing poor sealing and they ring to cylinder sealing are not going to be happy anymore or will they become happy again.
Once an engine is taken apart, the property way to make it good again involves new parts and machine work. Taking an engine apart, then simply re-assembling it is a really bad idea that often has bad results.
As for the spare engine, to make it good means all the usual checking, measuring, replacement of questionable-worn parts and GOOD speciality machine work. There is no escape from this if good results are expected.
Would it be a good idea for the lesser experienced, lesser skilled, lesser provisioned to take apart two philippe patek watches, mix-match their parts and expect them to work properly again?
Bernice
Piston rings wear into the bore they live in. If they are removed then installed into another bore, they will be mis-matched causing poor sealing and they ring to cylinder sealing are not going to be happy anymore or will they become happy again.
Once an engine is taken apart, the property way to make it good again involves new parts and machine work. Taking an engine apart, then simply re-assembling it is a really bad idea that often has bad results.
As for the spare engine, to make it good means all the usual checking, measuring, replacement of questionable-worn parts and GOOD speciality machine work. There is no escape from this if good results are expected.
Would it be a good idea for the lesser experienced, lesser skilled, lesser provisioned to take apart two philippe patek watches, mix-match their parts and expect them to work properly again?
Bernice
These letters? CCBB. I am sure I installed them in the same order as they came out, but not if from the same block. As explained earlier I switched blocks halfway and might have just switched installed pistons to the other block. If the pistons in the spare block don’t match the block then I have a problem and a possible solution.