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Cummins:QSM Series |
Oil Pressure |
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12
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Wed Sep 1 10 9:54 PM |
Aug 29 2010
07:54 PM |
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Phil
Have a weird oil pressure problem.
My oil pressure drops to 27 lbs or below after about 100 hours on an oil change.
Tried 3 oils all the same, Mobile Delvax-m,Cummins,Valvoline. Have both a mechanic..... |
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12 Responses....
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Aug 29 2010
09:37 PM |
#1 |
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Tomas Kempe
Since I started with a problem engine with oil pressure issue I am kind prepared for some surprises should they pop up again but it is news to you? I use 7 gallons of oil and top off oil filter with o..... |
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Aug 30 2010
12:03 AM |
#2 |
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Phil
No problem at low RPM never has approached 10 sits around 20. failure occurs after engine has heated up 190-200 degrees. I too suspect relief valve. If I have to pull engine I will either rebuild it o..... |
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Aug 30 2010
12:23 AM |
#3 |
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Tomas Kempe
Interesting. You seem to be fine at 20 psi that I also have. You refer to oil temp at 200F? I stay there also.
No big deal to change pressure relief valve as long as you can get underneath engine.
4..... |
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Aug 30 2010
08:44 PM |
#4 |
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Phil
Can not get under it. Have to pull engine. I´ll check for foaming. 40 W is ok for summer We lobster all year . will not work during fall. Nov thru april i have block heater plugged in so 40 will work ..... |
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Aug 30 2010
08:51 PM |
#5 |
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Bruce M
A question is what can get reset on restart??? Does the mechanical gauge show the decrease?? |
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Aug 30 2010
09:04 PM |
#6 |
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Tomas Kempe
Bruce, no reset. More likely that the foam settle, if that is what it is and at idle not much foam, with some excess oil it has been reported before that it can lower pressure - the full story is not ..... |
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Aug 31 2010
12:00 AM |
#7 |
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Phil
When i shut down engine and restart the oil pressure return to normal 40 lbs. Yes I have both a mechanical and 2 electric pressure gauges they all show the same. |
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Aug 31 2010
01:19 AM |
#8 |
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Randy Warden
This might not apply but we had an 270 HP 855 CI cummins a 1973 dump. The engine ran fine but, the oil pressure dropped and we took it to cummins for a rebuild. The old time mechanic came out to see t..... |
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Aug 31 2010
04:19 PM |
#9 |
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Kevin Mccloskey
I had the exact same problem with my last QSM 11. After an oil change, oil pressure was at its normal 40 psi,..stayed like this for between 100 and 120 hrs then gradually dropped to 27-28 psi and the ..... |
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Aug 31 2010
06:07 PM |
#10 |
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Tomas Kempe
Kevin: You are saving us a bundle having done this trouble shooting. Thanks a lot. From the bits and pieces remaining - changing the oil pressure sender would be what I try. It could fit in with what ..... |
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Aug 31 2010
11:23 PM |
#11 |
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[DELETED BY AUTHOR]
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Sep 1 2010
09:54 PM |
#12 |
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Kevin Mccloskey
Sorry phil i could not respond two your email ;ens 35045097 fitted in a new build in iceland 2002 fast worker |
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Cummins:QSM Series |
Boost Sensor Location |
VIEW/REPLY |
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6
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Tue Aug 31 10 8:40 PM |
Aug 27 2010
01:56 PM |
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Bpat64
Where exactly is the boost sensor located?..... I have QSM 11 535hp engines, Port engine not making full rpm under load.... Bottom is clean, props just reconditioned. Stbd engine makes 2300 rpm, Port ..... |
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6 Responses....
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Aug 27 2010
06:58 PM |
#1 |
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Tomas Kempe
On a later cpl 635hp engine it is located in front of the cross over from after-cooler to engine, right side. If you look carefully, may need a mirror, you will see part number on it. I think it is an..... |
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Aug 27 2010
08:34 PM |
#2 |
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Edgar
Tony, we have connected/used Insite twice, with the help of two different technicians from Cummings...results: all parameters were OK. There is a big difference in the boost ( 8 vs. 14 in the engine t..... |
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Aug 27 2010
09:48 PM |
#3 |
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Tomas Kempe
Have you ruled out the turbo as a cause of this, since Cummins see nothing wrong. A bad sensor would show up on the test I assume. Good luck if you need an electrician if Cummins is lost. |
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Aug 28 2010
12:32 AM |
#4 |
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Bpat64
Thomas.... Edgar´s reply was on the wrong thread..... I had a cummins tech check engines when I bought the boat 4 months ago.... everything checked ok... I can get the port engine to make 2300 rpm in..... |
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Aug 28 2010
08:20 AM |
#5 |
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Tomas Kempe
Does not hurt. Your intermittent thing (would not indicate mechanical as turbo I think) could indicate loose connections and Tony advice to dip in corrosion X or using WD40 on them. |
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Aug 31 2010
08:40 PM |
#6 |
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Bpat64
Swapped Boost Pressure Sensor with other engine, problem followed sensor will replace tommorrow and do final run. Thanks for your help with this.
bap |
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Cummins:QSM Series |
Cummins QSM11-M 1100rpm max in both engines |
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14
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Mon Aug 30 10 8:50 PM |
Aug 2 2010
01:49 AM |
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Varocho
Hi All!
I have 2 cummins qsm11-m 635hp engines in my boat. I have the following problem and would appreciate any help:
Both Engines revs up to 1100rpms max.
I already changed the Boost press..... |
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Aug 30 2010
08:50 PM |
#14 |
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Phil
I had the problem once. I changed my fuel filters and all was ok. |
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Cummins:QSM Series |
High intake manifold temperture |
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6
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Sun Aug 29 10 7:56 PM |
Aug 22 2010
11:18 PM |
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Phil
Have high intake manifold Temp. (only when above 1900 rpm.) No alarm .Temp runs 120 to 122. Any ideas? Engine is a QSM11-M with a little 10 K hours. All other reading within range. Its in a Lobster bo..... |
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Aug 29 2010
12:55 PM |
#4 |
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Phil
Manual sez 120 is max. Cleaned aftercooler last week. Turbo pressure is fine 60+ at WOT. |
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Aug 29 2010
01:31 PM |
#5 |
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Tomas Kempe
Can you change temp sensor between engines or get a new one. One ref would be to shoot the cross-over with IR and see if any difference. I think the temp probe is shut. If you have a single engine ge..... |
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Aug 29 2010
07:56 PM |
#6 |
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Phil
Thanks will try |
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Cummins:QSM Series |
Cummins QSM11 Electronic Throttle Control Needed |
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4
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Sun Aug 29 10 4:03 PM |
Jul 9 2010
04:39 AM |
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Tiara Mike
Anyone know where I can get a new or good used Morse Electronic Throttle Control, Mine has no resistance change with movement of throttle Lever and engine just idles and display reads 0% throttle posi..... |
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Aug 29 2010
04:03 PM |
#4 |
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Skeet
I couldn´t find them so I changed to the ETC´s made by Cummins. They worked perfectly. There are two on Ebay at http://cgi.ebay.com/ebaymotors/Cummins-Marine-ETS-Electronic-Throttle-Control-Adapter-_W..... |
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Cummins:QSM Series |
160F thermostst |
VIEW/REPLY |
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2
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Fri Aug 27 10 5:55 AM |
Aug 26 2010
11:50 PM |
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Tomas Kempe
Why is Cummins using a 160F thermostat on QSM 11 engines? Other Cummins engines have the 180F thermostat as seen here and CAT on a recent post has 198F and 208F thermostats at a huge difference in ope..... |
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Cummins:QSM Series |
unable to reach cruising RPM´s due to low boost ( 8) and intermitent electronic problem. |
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9
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Wed Aug 18 10 9:48 AM |
Aug 15 2010
04:51 PM |
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Edgar
Only with the help of the other engine will 1,400 rpm´s can be reached. I have cleaned aftercooler, heat exchanger and refreshed the turbo. I have switched the ECM to the other engine. I substitute..... |
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Cummins:QSM Series |
Turbo Blade |
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2
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Wed Aug 11 10 12:53 AM |
Aug 10 2010
08:28 PM |
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Ken
I ordered some new air cleaners from Tony and when I was installing them I noticed that the starboard turbo blade is missing the tips (see pictures). I ran the boat at WOT and the following results:
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Cummins:QSM Series |
Potential purchase of QSM 11 635 hp |
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3
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Tue Aug 10 10 8:31 PM |
Aug 10 2010
04:53 PM |
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Russ
I am considering the purchase of a 1999 40´ Legacy Sedan (no flybridge)with a single Cummins QSM 11 (635hp) engine with 2700 hours. Downeast style at about 22,000 lbs. No Serial # yet - have asked. I ..... |
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Cummins:QSM Series |
Rpm Loss & Black Haze, Mis Fire? |
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2
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Sat Aug 7 10 5:53 AM |
Aug 3 2010
01:03 PM |
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Saltytiger
Saturday evening while maneuvering on a sword fish my starboard engine would hesitate / cough / mis fire upon gear engagement and did even stall once? Fast forward to the ride home, synchronizer on, e..... |
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Cummins:QSM Series |
Correct Micron Filter |
VIEW/REPLY |
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1
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Thu Jul 29 10 1:02 PM |
Jul 29 2010
12:00 PM |
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Warren
Should the racor filter be a be a finer micron (2) or higher (10 -30) |
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Cummins:QSM Series |
QSM-11 Cylinder Liner Removal with Piston still in Liner |
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22
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Thu Jul 15 10 12:56 PM |
Jan 24 2010
02:02 AM |
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Tiara Mike
I have 2 cylinder liners that I need to remove from the top and these 2 pistons are at bottom dead center and need to pull sleeves up leaving pistons behind, I thought of tack welding a chain to each ..... |
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Cummins:QSM Series |
Oil |
VIEW/REPLY |
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1
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Fri Jul 9 10 3:45 PM |
Jul 9 2010
03:35 PM |
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Zm1
What oil is recommended for 660 hp QSM 11´s? |
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Cummins:QSM Series |
Excessive Exhaust Temp. |
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1
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Fri Jul 9 10 2:02 AM |
Jul 9 2010
01:15 AM |
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Jack Dibella
Has anyone had any problems with high exhaust temps ? We are dealing with a 2002 sea ray 480 sedan bridge with cummins QSM11 engines. The turbo mounting easket blew out twice, hylon released twice, af..... |
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Cummins:QSM Series |
QSM11 715 hp fuel fitting fracture |
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0
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Mon Jul 5 10 11:39 PM |
Jul 5 2010
11:39 PM |
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Spellbound
FYI -- 52" Hatteras crusing @ 1950 rpm, went below (salon) noticed fuel smell, back up to flybridge saw port engine fluctuating 50-75 rpm. Slowed to idle, checked engine room - smoke/steam comin..... |
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NO Responses....
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