ok i have a 95 bmw 740i... and about 2 weeks ago my check coolant light came on...i stupidly ignored it for about 2 days and then it overheated. i put coolant and water in it but ever since then it continues to overheat. both hoses are hot on the radiator and because of the style of radiator i cant see in enough to tell if there is movement. also when i turn my heater on there is not hot air and have heard all these things could have something to do with it! also there is alittle smoke coming out of my exhuast not alot just enough to notice...please help i have no clue what to do and dont want to get screwed at the shop! thanks
2007-07-29 10:11:16 · 6 answers · asked by ryannew83 1 in Cars & Transportation ➔ Maintenance & Repairs
Sounds like the oveheating episode caused the head gasket to leak as evidenced by the smoking from the exhaust. The coolant level is still low or you have air trapped in the heater core which would cause the no heat situation. Tough lesson to learn. They dont put those lights on the dash to amuse you.
2007-07-29 11:57:19 · answer #1 · answered by Ron B 6 · 0⤊ 0⤋
It sounds like the system is still low on coolant. However the smoke in the exhaust is a major concern. The most common cause of exhaust smoke, especially if it's white, is a blown head gasket. Overheating the engine could cause a head gasket failure, which would mean there could be another problem that caused the low coolant level. One quick and easy way to check for a blown head gasket is to start the engine cold, allow it to run a minute or 2 and see if the radiator hoses are pressurized (hard to squeeze). Check the hoses before starting the engine to have something to compare it to. Hope this helps.
2007-07-29 11:10:14 · answer #2 · answered by jitson 1 · 0⤊ 0⤋
radiator hoses are hot and heater is cold with heater on. Brokenwater pump impeller. Could be a stuck closed thermostat but then you would have a working heater and cold radiator hoses
2007-07-29 10:21:30 · answer #3 · answered by Magikmann 4 · 0⤊ 0⤋
if your lucky, you just need to replace the stuck thermostat. If your not lucky, you cracked the block. Check for a whitish lumpy fluid on the top of the oil dipstick, this indicates water in the oil which means you cracked the block. You may also have seized the water pump. They call those "idiot lights" for a reason.
2007-07-29 10:41:07 · answer #4 · answered by randy 7 · 0⤊ 0⤋
Yeah from what you are describing it should definitely be your thermostat at the very worst you may have a water pump failure.
2007-07-29 10:23:31 · answer #5 · answered by DXL 1 · 1⤊ 0⤋
You need a new thermostat. This is a cheap repair, get it done soon.
2007-07-29 10:19:48 · answer #6 · answered by milton b 7 · 1⤊ 1⤋