Smells like your water pump is on its last legs.
Thread: Odd Overheating issue E320  |
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Started 1 month, 2 weeks ago by Kavkazia
As I drive it gets even hotter and its close to 50F outside. Bypassed t-stat just to see if it was my t-stat but same problem. Bleeded system properly, key on, heater on, filled it up, started the car with cap off and after coolant started to rise up close to the neck, I put cap back on. Heater blowing burning heat so I assume there is no air in system.
No coolant leaks, good fan clutch, good...
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neanderthal replied 1 month, 2 weeks ago
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Kavkazia replied 1 month, 2 weeks ago
I was actually thinking about that as I know mid 90s bmws had propeller issues that was plastic and would break off but Im not sure about M104s . Does this cars have plastic propellers too?
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neanderthal replied 1 month, 2 weeks ago
I don't recall mine having plastic impellers, but if you research "water pump" you'll find its a dead horse that's been beaten.
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Kavkazia replied 1 month, 2 weeks ago
I doubt its water pump. No bearing noise, no coolant leak and I spun it
around when I replaced serp belt and felt normal. Motor only got 120k and
MB coolant since it rolled out of factory.
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bsmuwk replied 1 month, 2 weeks ago
If you smell a little sweetness in the exhaust, pull a plug or two and
check for crustiness.
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neanderthal replied 1 month, 2 weeks ago
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Originally Posted by Kavkazia I doubt its water pump. No bearing noise, no coolant leak and I spun it around when I replaced serp belt and felt normal. Motor only got 120k and MB coolant since it rolled out of factory. Mine didn't make noise but suddenly the temperatures would go up rapidly, especially when I was at a standstill.
But make of it what ...
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Kavkazia replied 1 month, 2 weeks ago
Another weird part of this is that, it doesnt have any coolant loss, I mean it stays exactly on point where I fill it cold. .
I just dont want to pop the head off and still have same problem.
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neanderthal replied 1 month, 2 weeks ago
So, follow my thinking here for a second;
*you've got the proper amount of coolant in there,
*you've removed the thermostat to eliminate that as a blockage,
*your fans come on according to spec,
*you don't have a coolant leak,
And yet you want to ignore the water pump to remove the head?
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Kavkazia replied 1 month, 2 weeks ago
Water pump was replaced about 2 years ago, like I said, I checked water
pump play and bearing noise last week when I did serp. belt on it. Didnt
find anything abnormal with it.
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Kavkazia replied 1 month, 2 weeks ago
Took out spark plugs and noticed some crust on 5 and 6 rest where good. Cked water pump again, this time, took hoses off, stuck fine long screwdriver to see if my propeller would not spin while I was spinning pulley and it does, so water pump is good. 99.9% Im sure in 2 years would not have gotten so corroded to the point where blades would have come apart.
Tore engine apart already, got ...
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