Re: Why buy reman longblock 5.7 engines?
Skargo said:
I'm sure this will be MORE reliable than any of the rebuilds out there...
LMAO! You really believe GM uses only the highest quality parts and machining in your original equipment engine? The same GM that had to get a government bailout to stay out of bankruptcy? Just like people who own rental property only use the highest quality, most expensive materials and worksmanship when they're getting a property ready?
In both situations, the end result is built to a price point to make money. If you want higher quality, you pay for it.
Works the same way for buying engines.
There's no magic in building an engine, it all depends on the quality of the machinist and his equipment and the parts used. High quality all the way through means a good engine. A lazy machinist, worn machinery, or cheap parts will adversely affect the motor. If you don't have any mechanical knowledge and aren't willing to do any research on what goes into a rebuilt engine, a stock GM is probably the best choice for you.
For example, a typical stock Chevy engine runs plus or minus .005 (five thousandths) in the location of the horizontal reference plane (crank centerline) and +/- .015 in the longitudinal plane due to core shift (this is why many engines must be sonically tested for thin cylinder walls before they are bored). GM is cranking out about 25,000 a day, and those tolerances are good enough for them. Something like a Rottler machining center used by a typical major rebuilder will hold +/- .0002 (two ten thousandths) on all axis. Crank/cam/rod/piston/cylinder relationships are held more accurately (sometimes called "blueprinting" an engine) and if parts at least equal to stock quality (not very hard to do) are used, the rebuilt engine will be higher quality (more reliable) than the stock engine.
