Wondering about a plastic part that broke on me - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-14-2008, 12:04 PM   #1
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Default Wondering about a plastic part that broke on me

The other weekend when I did my LIM job, i took of the tensioner assembly. I had to replace it with a new one and when I was transferring all of the parts and bits from the old tensioner to the new one, I tried to remove a beige colored plastic piece from inside of the lower heater hose connection.

Well i should say that I tried to remove it and it disintegrated into bits. It looked like a filter or junk catcher of some kind so i just assumed that it wasnt essential. The car is running great, but is that there to prevent gunk from the heater core from returning to the motor? Should I try to replace it or just continue living in ignorance?
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Old 02-14-2008, 12:06 PM   #2
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Did you get a picture? Did you keep the pieces?

I'm wondering if what you had there was a deposit of sludgy Dex Cool crud (or the remains of a stop-leak pellet).
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Old 02-14-2008, 02:00 PM   #3
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No it wasnt that. This was a formed plastic piece that was pressed in to the lower metal tube coming off of the tensioner assembly.

Sorry I did not save the bits or get a pic of that.

On a side note, i had to turn the heat on in my car today..a truly novel experience.
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Old 02-14-2008, 02:25 PM   #4
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If you want help on this forum or if you want to help someone, the most useful thing you can do is take pictures. Have a camera in the garage with you anytime you work on your car. Pictures are truely worth a thousand words.
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Old 02-14-2008, 02:47 PM   #5
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OK, here'* my next guess...a broken-off bit of a previous plastic coolant elbow. Was it ring-shaped?
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Old 02-14-2008, 02:48 PM   #6
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I ran into the same problem. I got one from the junk yard for 2 bucks. Rock auto has them for $13.68. It is called a Heater Control Valve.




From what i heard it is needed. I don't know how it works but i guess it controls the coolant flow.
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Old 02-14-2008, 02:58 PM   #7
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azu- no that is the other end of the hose that attaches through the firewall to the heater core. I am talking about up where the hoses attach to the tensioner assembly. I really should have got a picture of it, but i was in a hurry. Took lots of pics of the LIM job though
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Old 02-14-2008, 03:01 PM   #8
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Sounds like a coolant elbow. The part of showed goes into the heater hose.
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Old 02-14-2008, 03:29 PM   #9
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nope not a coolant elbow either. the only coolant elbow on my motor goes between the LIM and the tensioner assembly
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Old 02-14-2008, 04:22 PM   #10
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Name:  PLASTIC.jpg
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This might help..i dunno
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