Overheating 1984 318i - BMW Forum

Kid_318i · 09-20-2010, 03:44 PM

I have an overheating problem the gauge needle reaches the third line. The fan clutch is new, I eliminated the thermostat, I took the radiator to get fix because it was clogged and obviously changed the engine coolant. But I keep thinking why the car overheats and the engine fan clutch doesn't goes hard. The electric fan works both speeds but the fast speed switches on it doesn't come off meaning that the coolant is not cooling. Can anyone help ?

johnnyBgood · 09-20-2010, 03:54 PM

Did you bleed the coolant system after you replaced the radiator & coolant.........

coolant system bleeding trouble. - Bimmerforums - The Ultimate BMW Forum

jb

Kid_318i · 09-20-2010, 04:23 PM

The 84 318i doesn't have the bleeding screw in the thermostat housing.

johnnyBgood · 09-20-2010, 04:42 PM

Quote:

Originally Posted by Kid_318i

The 84 318i doesn't have the bleeding screw in the thermostat housing.

Then it should be self-bleeding..........when does it overheat? @ idle, driving or both........

jb

Kid_318i · 09-20-2010, 04:56 PM

Both, this is driving me nuts

johnnyBgood · 09-20-2010, 05:15 PM

Quote:

Originally Posted by Kid_318i

Both, this is driving me nuts

Sometimes removing the t-stat is not a fix.....I agree, if the flow is too fast, coolant might not cool.......

Can thermostat elimination cause overheating? - evolutionm.net

also.....with the radiator cap loose & the heater on high.....I would try squeezing the upper & lower radiator hoses......maybe there are some air pockets.........

jb

conjuay · 09-22-2010, 06:01 AM

Water Pump?
Sometimes the fins just rust away until there is hardly any water movement.
You'll see flow, but it's not [I]enough[I] flow
I know this from experience... "I'm in Florida, I don't need anti-FREEZE!"
Well, there are rust inhibitors in the coolant, and corrosion may be the culprit.
Someone, alone the way might have let the antifreeze go too long.