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CATEGORY LISTINGS > CATERPILLAR > 3116 excessive oil consumption [ REFRESH ]
Thread Title:

3116 excessive oil consumption


Created On Saturday January 24, 2015 10:05 Diesel Talk
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pthurman48
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Joined: Jan 2015

Note Saturday January 24, 2015 10:05 View thread in raw text format
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my 94 CAT model:3116 Serial: 9gk09902 in a motorhome with 130k miles is using about 1 qts oil per 100 miles. It use to use 2 qts per 700-800 miles. No smoke out the exhaust the pipe(black or blue) any time. Cruise rpm is 1900 at 60 MPH. Blow by is with in specs., cold side of turbo is clean and dry, inlet to air-on-air cooler is clean and dry, fuel is clean and clear, coolant water is clean and clear, output of air compressor is clean and dry, no oil leaks(sitting/running). The engine starts easy, runs good, get good economy(10 MPG while towing a saturn sc1) . Where is the oil going? What is left? how do you check futher? Thanks in advance for any help/ideas.

Pat,

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Pat,
To GOD be the Glory!
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firetrucktech
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Joined: Nov 2014

Note Saturday January 24, 2015 19:30 View thread in raw text format
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Is the dip stick correct for this engine?
I don't know a lot about Motorhomes but every fire truck I have ever seen had a home made dipstick to fit the cab. Also have you looked at the bottom of the Radiator cap for oil? and does this engine have a coolant filter? We had a oil cooler leak and oil showed up in the filter.
Good luck.
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pthurman48
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Note Sunday January 25, 2015 07:00 View thread in raw text format
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Pat,
To GOD be the Glory!
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pthurman48
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Note Sunday January 25, 2015 07:03 View thread in raw text format
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The engine coolant is clean and clear. At oil change I put in 19 qts., check the dip stick, then add the last 2 qts. and recheck. My full mark is the "ADD mark".

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Pat,
To GOD be the Glory!
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TDcrash63
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Joined: Sep 2007

Note Sunday January 25, 2015 17:17 View thread in raw text format
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3116 mechanical I presume? If you have checked all the easy stuff. Dipstick calibration, turbo inlet and outlet, after cooler, oil cooler, oil leaks and so on. The very last and least likely would be the intake manifold/rocker housing. The intake ports are integrated into the rocker housing. I have seen these gaskets leak over time and draw engine oil from the valve train area into the engine and burn the oil. It may also under heavy load push oil out the breather. Very common for the dipsticks to be incorrectly calibrated and the engine to be overfull on oil. Make sure you check this before anything else. There is a capacity chart in the owners manual.
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