I think you could be fine while driving (with a failing cap). Once you stop, then heat and pressure build. Speculative, but hey, cheap to try out
Jes
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87 Milano Verde - daily driver -
Juliet
87 Milano 3.0 Motronic - budget race car -
Roxanne
87 Milano 3.7 24v - race car
(Repeating what I suggest or do is at your own risk - be critical)