Turbo Boost Pressure
Posted 09 December 2012 - 07:54 AM
.Any suggestions, I have already changed both fuel filters, the air filter gauge showed 15% it red lines at 25%.
Posted 09 December 2012 - 08:16 AM
Posted 09 December 2012 - 08:37 AM
Posted 09 December 2012 - 09:03 AM
Please check again for what unit you are expressing boost in. It could be in PSI or in column inches of HG. Very unlikely to be a percent.
You can call the Caterpillar RV Hotline at 877 777-3126 with your engine serial number to find out exactly what boost your engine should produce (as well as what boost it did produce on a dyno before leaving Caterpillar).
Next question: is this lower boost than it has been in the past? Sudden drop or gradual? At 6,500' you should be generating full boost-- that is the beauty of a turbo.
Looking for causes of a drop in boost pressure would begin with:
1. Leak between exhaust manifold and head or exhaust manifold and turbo-- look for any black (soot) at those locations.
2. A leak in a hose between turbo and tube going to CAC, tube to CAC, leak in a hose between the CAC and tube going to the engine and leak in hose at the engine intake manifold.
3. Leak in the CAC itself.
Brett and Dianne Wolfe
2003 Alpine 38'
Moderator, FMCA Forums
Chairman, FMCA Technical Advisory Committee
Member, FMCA Long-Range and Development Committee 2007-2009 and 2014-2015
Moderator, http://www.dieselrvclub.org/(FMCA chapter)
Posted 09 December 2012 - 01:19 PM
Work safe around the engine.
Posted 09 December 2012 - 04:55 PM
I am going to be tied up tomorrow but will see what I can find the next day.
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