Hi:
Probably a repetition of earlier (and frequent) questions, but here goes:
1990 3.3L Grand Voyager - lots of miles. When it gets hot, lots and lots of gas bubbles start appearing in the coolant overflow container. I've seen this before in other vehicles - I gather there can't be any other cause than a leaky head gasket, right? Is there any need to confirm this cause with any reliable test?Obviously when this happens (usually during some hill climbing), the cooling system doesn't really do its job very well and things start to overheat.
Dave