Rule of thumb on injector cups?

freddie

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What's the general rule of thumb as far as replacing them? Engine has 130k on it. I'm getting ready to swap injectors and didn't know if I should replace the cups while I'm in there.

I have been running red ELC coolant for years, although I have seen postings more recently, suggesting that the red ELC is not compatible with the OBS cups and sealant. That may be a factor in everyone's advice.

Just want to make sure I have all the necessary parts in hand when I do the injector/T4 swap.
 

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