TwinTurbo.NET: Nissan 300ZX forum - Re: R7 is up to the task for coolant lines, rated pressure is
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Subject Re: R7 is up to the task for coolant lines, rated pressure is
     
Posted by Rob260 on June 13, 2011 at 1:39 AM
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In Reply To R7 is up to the task for coolant lines, rated pressure is posted by BigTDogg (MA) on June 11, 2011 at 09:17 PM
     
Message :Well above typical coolant system pressure

All well and good but I know of a few that have had problems with 30R7 going rock hard due to the heat eg [ http://www.aus300zx.com/forum/showthread.php?t=297995 ]

For the minimal additional expense it's worth fitting 30R9 with higher temp rating.

Or go proper coolant hose J20R3 D3 which is rated to like 150* constant use.

     
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