Doorman has new aluminum coolant elbows [x-post from bville pro] - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-27-2012, 10:14 PM   #11
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Originally Posted by ymmot04 View Post
I think even more than the O-rings, the expanding and shrinking of the plastic when it got hot was an issue. I wouldn't think you would have the same issue with aluminum.
Over time I am sure the expanding, contracting, are what contribute to the ends falling apart, the o-rings blowing out, that and I've heard some coolant systems can get over-pressurized, and that the Dorman o-rings can't take the pressure so they leak, I am not sure how true that is, but when I replaced mine when I did my UIM/LIM job I had it leak on me when revving the car while at normal operating temperature, I removed the elbow and could see the o-rings that already looked a tiny bit too small compared to the AC Delco o rings, had shrunk, or the outer edge had flattened off, and it was allowing the elbow to have a small leak, I replace the o-rings with AC Delco ones and have had no leaks since.
Aluminum should fix the warping/blowing out issue with the old elbows that some would experience, but if the o-rings used are prone to fail, then I am sure some of the elbows would still develop leaks.

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Wasn't it Dorman the whole time to begin with???
I am not 100% sure, but I've always been told the ones GM sell are from a different manufacture, it may well be that they are all made by the same company, I just cannot see why they both do not have the same o-rings, I am almost positive the elbows from GM had AC Delco o-rings.
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Old 08-28-2012, 05:18 AM   #12
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I'm not sure either, but I know we all must agree on one thing, its about DARN time they came out with something different right?!
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Old 08-28-2012, 07:01 PM   #13
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Most definitely!
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Old 08-28-2012, 07:23 PM   #14
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where can we buy he new designs?
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Old 08-28-2012, 11:34 PM   #15
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where can we buy he new designs?
The only place I know of that stocks them so far is RockAuto.

DORMAN Part # 47065hp
More Information About this Part #12565082, 24503423} Elbow; Aluminum; w/O-ring Seal; Includes Upper & Lower Elbow
Category: Heater Hose Fitting

15.54 total shipped.
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