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Old 09-30-2014, 02:23 PM   #1
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Turbo Silicone Elbow Replacement

Does anyone know the torque specs for the clamps on the 4" Silicone Turbo Elbow. I keep tightening it and I am still getting a whistle. I am afraid to tighten it to much as it might cut the elbow brake the clamp. Any other suggestions would appreciated. Thanks

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Old 09-30-2014, 03:00 PM   #2
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Most OEM clamps are spring loaded and therefore, self-adjusting
PS--hope you got the orange hi-temp elbows and not the blue "low-temp" ones....

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Old 10-01-2014, 06:36 AM   #3
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My experience is that the silicone charge air connectors leak no matter what clamp pressure is applied. Perhaps they "seat" with time and temperature. I ended up putting double clamps on all connections to get them to stop leaking. this is the only way I was able to get a new CAC to pass the leak-down test.
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Old 10-06-2014, 09:50 PM   #4
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I think Engineer Mike suggested some hair spray on the pipe before the elbows are installed. I changed one myself, and it was a bear getting it on. I have never had a leak or whistle except when that elbow failed in service. Of course, WRV had installed one of the blue ones, and I had to order the orange one and install that one. The repair shop used in the accident also installed the blue ones and I had to have them changed before I would accept the coach back. I have those on my work bench, should carry one for a spare in case I blow an orange one.
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Old 10-06-2014, 10:02 PM   #5
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Originally Posted by Old Scout View Post
Most OEM clamps are spring loaded and therefore, self-adjusting
PS--hope you got the orange hi-temp elbows and not the blue "low-temp" ones....
On our DSDP the turbo connections are blue silicone, they've been there for 13 years now except when I took some apart to install the Banks kit. I don't remember the torque values I used but the Banks gauge shows 35 psi under full load so they must be OK.
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Old 10-06-2014, 11:06 PM   #6
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Yes, that might be true, as Newmar's are different and plumbed differently than an alpine. Like I have been saying, Alpines are a different breed of motorhome, and no other is like them. WRV worked with Cummins to develop the side radiator and it's associated CRC and exhaust gas/turbo system. Because of the way ours is plumbed into and out of the turbo into/out of the CRC, we need the orange silicone elbows because of the heat.

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