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Does anyone know what process is used to weld the round caps to the rod? Or are they even welded at all?

Any advice is appreciated.

RE: Pushrod

what do you mean by "round caps"? piston?!
You cann't assemble push rod within piston cap by using welding!

RE: Pushrod

Okay then, maybe I should ask,

 "How is a pushrod manufactured?"

RE: Pushrod

Some aluminium push-rods have press fit steel ends.

pat   pprimmer@acay.com.au
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RE: Pushrod

I'm taking a guess here but I'll bet they are friction welded.

RE: Pushrod

Friction welding is  used commonly to manufacture components like pushrods and poppet valves for high volume automotive applications.  Lower volume requirements for racing, etc. are machined directly from bar.

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