07-29-2015, 02:51 PM
Join Date: Jul 2015
Location: Lubbock, TX
Originally Posted by fordem
I'd say that's quite a conclusion you're jumping to there.
I've personally experienced more than one cooling system leak that never had any coolant underneath - in one case it was a crack in a radiator tube - no leakage until the system was hot & pressurized, and the stream of coolant was so fine that it was almost invisible - I only found it because the hot water discolored the plastic it was spraying onto. In another, it was a cracked top hose, again only leaking with the system hot & pressurized.
A head gasket problem is just one of many possibilities.
You are correct that these could be factors to consider as well, but I am assuming that the OP has already performed a visual inspection of the engine and radiator areas. Also, external coolant leaking is usually only visible if the vehicle is parked on a hard surface (ie. concrete or asphalt), or int he same spot repeatedly. If it is in the country on dirt or grass, then one may never see it.
Milky oil would be the telling sign for a leaking head gasket though.
'74 Datsun 610 Wagon Blue
'85 Toyota Corolla GT-S Hatchback Medium Gray Metallic
'90 Nissan 300ZX Twin Turbo Aztec Red
'92 Lexus SC400 Diamond White Pearl
'99 Lexus SC300 Millennium Silver Metallic
'97 Nissan 240SX SR-Turbo Obsidian Black
'03 Suzuki Carry Truck 4WD
'03 Nissan 350Z Aero 6 Super Black
'05 Chevrolet Avalanche LT Super Black (daily driver)
'09 Nissan Cube S Ginormous Super Black
'09 Nissan GT-R Premium White Pearl #0064[/size]