Hey Scotty have a 2008 Nissan Armada. I have water getting into the cooling system. Is there a head gasket sealer that works. For this
Sludge on the just the cap doesn't necessarily mean a blown head gasket. Have a look at this.
Well I presently like the 20 something dollar bottle of bars head gasket sealer that AutoZone sells. Just realized there's a lot of pressure in there and sealers often will not last long
Scotty has a video about it