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Old 05-12-2016, 03:56 PM   #1
Join Date: Aug 2006
Posts: 96
Turbo hose

I am in the process of ordering a 90 degree turbo hose. Referring to a past post, the part # is 3648-400-MK, Purosil, for the 500F.
I removed a blue hose, part # 90-400-16/E0601, 350F. This was supplied by WRV back in the glory days. This is a 6" X 5" leg elbow. The 6" leg was at the turbo end. Purosil confirms this is a special order.
The 3648 is a 6" X 6" leg elbow. A 500F is not available in a 6" X 5" configuration. Were there any conflicts with installing a 3648? There seems to be enough wiggle room to get this installed.

The inside of the hose has black streaks, as if oil had been placed near the turbo end opening and then blast it with a compressed air nozzle toward the CAC, creating thin rivulets of black (oil?). Is this indicative of a problem in the turbo?
Alpine Coach, 2007 Apex MDT
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Old 05-12-2016, 11:28 PM   #2
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Join Date: May 2004
Location: cayucos, ca
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Turbo seal is slightly leaking. Not a big problem unless the seal blows. I wouldn't worry about it now. Btw Purosil is a long time mfg of turbo hose. Another company who has made turbo hose for years is Flexfab. They are in Michigan I believe.
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
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Old 05-13-2016, 07:12 AM   #3
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I used the 3648-400-MK and there were no conflicts.
Rick T
2006 Alpine 34FDDS
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Old 05-18-2016, 03:19 PM   #4
Join Date: Aug 2006
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Thank you for the input. Hose ordered. I hope they have the right clamps in the box. I ordered the heavy spring T bolt clamp.
Alpine Coach, 2007 Apex MDT
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