derekf
09-17-2005, 07:27 PM
Started assembling my engine today.
Found something .. odd, and by "odd" I'm not referring to the way that the #5 and #6 pistons had been put in the wrong holes.
There's a little dot on the pistons, that I believe notes which side of the piston should face the front of the engine.
There's also a bevel on one side of the big-end of the rod, which I believe should be put towards the fillet on the crank.
Also on my particular engine, there's dents in the pistons where the valves have impacted.
If I assemble the engine such that the dents are towards the top edge of the pistons on both sides, and the dots are towards the front on both sides, then the beveled edge of the big-end of the rods are not facing the fillets. If I put the bevels right, then the dots are facing the back of the engine and the dents are not where the valves would have hit.
This tells me that the engine was run and driven hard with half the rods backward, or I'm an idiot.
Am I a moron, or should the rods be set such that the bevels line up with the fillets (ok, so I may not be using the correct terminology)? And if the bevels need to line up, will it create a problem that the dots are now facing the back of the engine - do I need to take those four pistons out and take them up to the machine shop to have them turned around on the rods?
Found something .. odd, and by "odd" I'm not referring to the way that the #5 and #6 pistons had been put in the wrong holes.
There's a little dot on the pistons, that I believe notes which side of the piston should face the front of the engine.
There's also a bevel on one side of the big-end of the rod, which I believe should be put towards the fillet on the crank.
Also on my particular engine, there's dents in the pistons where the valves have impacted.
If I assemble the engine such that the dents are towards the top edge of the pistons on both sides, and the dots are towards the front on both sides, then the beveled edge of the big-end of the rods are not facing the fillets. If I put the bevels right, then the dots are facing the back of the engine and the dents are not where the valves would have hit.
This tells me that the engine was run and driven hard with half the rods backward, or I'm an idiot.
Am I a moron, or should the rods be set such that the bevels line up with the fillets (ok, so I may not be using the correct terminology)? And if the bevels need to line up, will it create a problem that the dots are now facing the back of the engine - do I need to take those four pistons out and take them up to the machine shop to have them turned around on the rods?