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Old 02-07-2006, 11:32 PM   #1
jeffrie
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Plastic W.P. impeller failure

When the common plastic water pump impeller falls apart (Common M50-M52 issue) what are the tell tale sighns?
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Old 02-08-2006, 12:00 PM   #2
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overheating, no coolant circulation..
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Old 02-08-2006, 12:09 PM   #3
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So far it just boils over and has a vibration on acceleration till it overheats. Was wondering if their would be play in the pully or plastic peices floating around to verify it. Geuss I'll just order it.
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Old 02-08-2006, 12:38 PM   #4
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There are no plastic pieces floating around, the whole impeller breaks off as a whole iirc.

Try to bleed the system first..
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Old 02-08-2006, 02:41 PM   #5
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Quote:
Originally Posted by mirek
There are no plastic pieces floating around, the whole impeller breaks off as a whole iirc.

Try to bleed the system first..
nope, the impeller can break in different ways, mine basically exploded, lol...


what it should look like


where did the impeller go?


oh there it is


even if it isn't giving you problems yet, change it, I learned the hard way....
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Old 02-08-2006, 02:53 PM   #6
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yeah, what i meant piece of the impeller dont start circulating through the cooling system
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Old 02-08-2006, 02:58 PM   #7
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Quote:
Originally Posted by mirek
yeah, what i meant piece of the impeller dont start circulating through the cooling system
lol, but they do! i had to reach into the coolant holes and pik out the little bits of plastic that were caught in there.....but i guess my impeller was a bad break.....
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Old 02-08-2006, 03:47 PM   #8
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weird,
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Old 02-08-2006, 03:48 PM   #9
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does the water pump has anything to do with the heat too??
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Old 02-08-2006, 03:55 PM   #10
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interesting.

does this problem apply to 318's?
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Old 02-08-2006, 04:00 PM   #11
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the water pump is what circulates the coolant through out the system, which cools the block and heats your car
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Old 02-08-2006, 04:04 PM   #12
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basically, if u're not getting any heat, its usually a thermostat problem, if ur car overheats and ur car came with this pump stock and u still have it, it's usually the culprit
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Old 02-08-2006, 04:06 PM   #13
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usually it's a cracked plastic tstat housing or a broken neck on the rad...
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Old 02-08-2006, 04:54 PM   #14
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Quote:
Originally Posted by BennyL
interesting.

does this problem apply to 318's?
Thankfuly no.
318's are bullet proof
Most definatly can't say the same for my buddy's 323is.
Done more repairs to his M52 the past few months then I have in over 2 years.
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