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02-09-2016, 01:01 PM
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#1
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Senior Member
Join Date: Jun 2015
Location: Florence, AL
Posts: 201
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Engine louder as it warms up - Holiday Rambler
HI, when i first crank my 2003 8.3 from cold, it is fairly quiet running, then in about 30 seconds its like something changes and the engine is louder and the cummins engine rattle is now loud and pronounced. dont know what the start up and warm up cycle is on an 8.3 that would cause this to occur. It it a warm up cycle thing going on? thx GRT
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2020 F350 with 7.3 Godzilla
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02-09-2016, 01:10 PM
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#2
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Senior Member
Join Date: May 2014
Location: Henderson, Nevada
Posts: 1,224
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Quote:
Originally Posted by grthigpen
HI, when i first crank my 2003 8.3 from cold, it is fairly quiet running, then in about 30 seconds its like something changes and the engine is louder and the cummins engine rattle is now loud and pronounced. dont know what the start up and warm up cycle is on an 8.3 that would cause this to occur. It it a warm up cycle thing going on? thx GRT
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Are you talking about the whistle?
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2005 Newmar DS 4023, Spartan Chassis, ISL 370 Cumapart, 2008 Jeep Rubicon 4dr, 2015 Kia Soul, 1969 Italian & 2004 Akita
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02-10-2016, 03:45 AM
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#3
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
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Quote:
Originally Posted by grthigpen
HI, when i first crank my 2003 8.3 from cold, it is fairly quiet running, then in about 30 seconds its like something changes and the engine is louder and the cummins engine rattle is now loud and pronounced. dont know what the start up and warm up cycle is on an 8.3 that would cause this to occur. It it a warm up cycle thing going on? thx GRT
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I think what you are hearing is the air compressor loading up? Does the noise quit after the air dryer spits and unloads? When you say cold start, how cold is it?
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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02-10-2016, 06:54 AM
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#4
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Senior Member
Join Date: Feb 2013
Posts: 558
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I had a 2000 that did the same thing. It was like the ecm changed the timing after 30 seconds. Someone else on this forum said theirs did the same so I quit worrying. It did change sounds slightly though. Unless you are standing next to the engine I don't think you would hear it.
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2002 Beaver Marquis Emerald C-12 Cat 505 HP towing 2004 Honda CR V with 300K on clock
2014 Volvo 630 Heren Bed ET Hitch SOLD
2017 New Horizons Majestic 35 foot SOLD
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02-10-2016, 08:49 AM
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#5
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Senior Member
Join Date: Jun 2015
Location: Florence, AL
Posts: 201
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That sound like what it is to me, timing change makes sense on it thx for the replies
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2020 F350 with 7.3 Godzilla
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02-10-2016, 07:58 PM
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#6
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Senior Member
Monaco Owners Club
Join Date: Sep 2007
Location: Scottsdale, AZ
Posts: 2,321
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My 99 Dynasty did same thing. No need to worry.
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Harry
2008 Monaco Camelot 40' PDQ
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02-11-2016, 10:02 AM
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#7
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Senior Member
Join Date: Nov 2013
Location: Elko, Nv
Posts: 2,464
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Could also be the grid heater shutting of and you would get more rattle.
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