3571Re: [bmw e28] Need assistance with Overheating
- May 3, 2005Hey Chris
Right now it�s just the gauge is saying it�s over
heating. It�s always in the red. I am not losing any
Coolant. I installed a new sensor and that didn�t fix
the problem. So I installed an aftermarket sensor and
gauge and removed my thermostat and if I let the car
idel for 5 minutes it says it puts the gauge in the
red. I have opened the bleeder screw for 5 minutes
and let the car run while putting more coolant in and
all that comes out of there is liquid.
When I did the spark plugs for my tune up they were in
I have a brand new cap on my coolant tank from bmw
because that was the first thing I notice. When I
squeeze the radiator hose when the car is cool to hot
I can see the fluid spill back into the coolant tank.
I know when the gauge says it is over heating you can
grab the radiator hose and its hot but not know 120
I was going to change the switches on my radiator for
my aux fan but I am having a hard time finding the 2 I
need. All the parts stores around here say I only
have one. So I have to call the dealer up and see
what they might be able to do for me.
I am also going to try and flush the engine and
radiator to make sure there is no build up. However I
did that last year when I had the water pump changed.
Its really strange.
--- chris insalaco <herrsinalco@...> wrote:
> You say your car is overheating but
> what are the symptoms? Is it just hot on the gauge
> or is the coolant disappearing? On the coolant tank
> make sure the screw on cap has its seal and the
> pressure valve in it is working. If you get some
> 5/16" or 8mm fuel line, two 5/16" by 1/4"npt hose
> barbs, 1/4"npt T-fitting and a Schrader tire valve
> with 1/4" npt to fit in line betwen the radiator and
> the coolant tank. This way you can pressurize the
> cooling system and check the coolant cap valve and
> leak down of system pressure in general. A tire pump
> and pencil pressure gauge work for this but you can
> go deluxe and get a four way fitting instead of the
> "T" and add a 30psi clock gauge.
> EVEN EASIER. Pull your spark
> plugs and check for that pretty, clean one (or two)
> that have been steam cleaned by coolant. Some cars
> with poor cooling system maintinence get rust scale
> and corrosion stuck in the passages between the head
> and the deck. New radiator could have rust scale
> from old engine.CHECK your fan belt.
> Squeeze the radiator upper hose with car
> running and not. The difference should be obvious,
> use a rag if hot.
> Open bleed screw on thermostat housing.
> Especially before hose squeeze test. If coolant only
> comes out, rejoice. If air, steam and foam come out
> try topping off the system and bleeding it again. I
> did this for nine months on my bavaria and there was
> more coolant (H2O) missing until one night it
> expelled its liquid in three miles. The temp gauge
> would flicker but that time it went full hot. Nine
> miles, three fill ups. Good luck!
> Chris 277k 83' 528e
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