Sub them one at a time with close values. Try one, then put the original,
Try the other then back to original.
Sams should have the value range. will be in pf and read like
10 pf - 100 pf choose something mid range.
Odds are there may be retuning but it will prove that out.
BTW I never seen one bad, just piston caps on modern sets.
BTW 2 Make, model, chassis ## ??
73 Zeno
LFOD !