Engine lost power then wouldn't start. Serviced Engine but still no start. I had trouble when it was brand new and it did this, Repair Facility said it had stuck valves and I needed to use better gas. Now I get clean High Octane. But my Wife said that she bought Regular last time. So I took the valve covers off and found a bent rod. When looking at parts there is an Aluminum and a steel rod, but no indication which I should use? Can anyone tell me if one is steel and the other Aluminum or is there a TSB changing both rods to Steel or vice versa. Why is there a choice and nothing in the Manuals about it? Maybe this is what was wrong the first time this happened but the shop just straightened the old one and sent it back? Can anyone help me? Besides a Shrink!

Aluminum goes on exhaust
Steel goes on intake

Why is that? It does not make any logical since to put Alu on Exhaust since it is the hottest? Can you explain why the two types?

Logical sense. Spelling error!

Aluminum holds heat better then steel.will not stretch.

Thanks for your help, Someone at the Factory put both Aluminum Rods in this Engine on both jugs. I'd rather bend an Aluminum rod than break something else.
Thanks for the experience you have, and the time you take to help people out.