Had thermostat replaced. Drove 25km then starting heating up. Expansion shiwed no coolant in it. Antifreeze coolant all over inside driver side tire. Coolant only seen on underside of vehicle on driver side. Engine oil recently changed within 2weeks. Now instrument panel says it requires oil change. Dip stick ok, shows oil level in hatched area. Do I have a hose leak or a bad head gasket or cracked cylinder.
When the oil was changed, did anyone reset the oil life monitor? It needs to be reset every time an oil change is done. That would explain why it is telling you to change the oil so soon.If you have a bad head gasket, antifreeze mixes with your oil. Check the oil on the dipstick. Does it look normal? Check under the cap where you pour the oil into the engine. Is the oil cap wet on the bottom? If yes, and the oil on the dipstick does not look normal, the head gasket is defective. It most likely would leak where the thermostat is located, since the gasket seal was taken out and replaced with a new one. It may not have been done correctly. There may be a puncture in a hose. There could be a crack in the coolant reservoir tank. The thermostat must be stuck in the open position or the thermostat was installed backwards for it to take that long to heat up. Refill the coolant reservoir tank with antifreeze and water before driving the car to avoid severe engine damage.
SOURCE: 1999 Pontiac Grand Am Overheating
It is probably the problem. To make shure that need to change the gaskets, one of the symptoms use to be thet the temp rises when you are running at speed 50+ average, where is supposed that the car gets a lot of air due by the speed and nobody thinks that will be overheated.
SOURCE: White smoke coming out of exhaust even when engine is warmed up.
on the 3.8 ussaualy not the head gasket but the upper intake gasket . antifreeze leaks inside intake and into the cylinder. very common. the new gaskets are much thicker.or the plastic plenum the black plastic part on top of the engine goes bad around the water inlet and need to be replaced . when i do either job itell the person to replace both at same time saves money and headaches in the near future. hopes this helps .....and cost for a shop to do this $1100 to $1500
SOURCE: 2007 JUST STARED LEAKING COOLANT---TOOK CAR TO A
is it leaking on passenger side toward front could radiator ,hose ,water pump . if it smoking white it burning coolant in cylinders head gasket. how often is it loosen coolant it not got hole in the plastic overflow container. check oil make sure not milky white .
SOURCE: My 2006 Pontiac Torrent cooling
Even if there were no hydrocarbons detected I am almost positive you have a bad head gasket.Usually the back head on the number one cylinder.Almost all the ones I have done with this exact problem has been the rear head and the number 1 cylinder.Hair line crack between the cylinder and water jacket.I always replace both head gaskets.Hope this helps.Good luck.
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