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  #1  
Old 03-30-2002, 04:42 AM
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To read the engine oil dipstick

I was told by my mechanics to read the dip stick 3 minutes after the engine is off. However, I found that this is no longer correct with today's engine oil. The oil we use today are design to cling on to the engine part so well that 3 minutes is not enough for them to drain down back to the pan and therefore the dipstick reading is incorrecct. I think we should leave the car overnight to have it checked.

Any comments?

Michael Tse
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  #2  
Old 03-30-2002, 12:26 PM
Ali Al-Chalabi's Avatar
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With Mercedes, the dipstick is calibrated to read the level of hot oil. Due to thermal expansion, there will be a slight difference between checking the level cold and hot. I check it with the engine at operating temp on level ground after about 10 minutes or so to allow all the oil to return to the sump. The key is to check the level with the egnine at operating temp and allow enought time for the oil to return to the sump.
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  #3  
Old 03-30-2002, 01:57 PM
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On the 104 engine, oil level at top mark when cold is over-filled.
There is a TSB on this .
The ideal is 1/2 way mark at 80C.
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  #4  
Old 03-30-2002, 10:00 PM
Saguaro2000
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Arthur

Arthur, would you please advise the TSB no. and date of the TSB recommending filling to the half-way mark on the dipstick when the engine is warm? Thank you very much. (I have been thinking that some of the oil leaks on these engines may very well be due to overfilling the oil on the part of people that are not aware of the TSB you have referred to.)

Mike
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Old 03-31-2002, 12:36 AM
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Re: Arthur

[QUOTE]Originally posted by Saguaro2000
[B]Arthur, would you please advise the TSB no. and date of the TSB recommending filling to the half-way mark on the dipstick when the engine is warm? Thank you very much. (I have been thinking that some of the oil leaks on these engines may very well be due to overfilling the oil on the part of people that are not aware of the TSB you have referred to.

Sure . Here you go

104 eng.
TSB-18-045 and 00-134 -- Issue Date 11/95
Effective - Immediately

[ these two cover the Revised Capacity on 104 engine
From 7.5L to 7L.]

TSB-00-057A Date 12/95
Revised dip stick level checking marks and procedure
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  #6  
Old 03-31-2002, 04:20 AM
shrek
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how about automatic transmision .....i mean the ATF fluid.....do we need to let car off for that same period?
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  #7  
Old 03-31-2002, 09:57 AM
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Quote:
Originally posted by shrek
how about automatic transmision .....i mean the ATF fluid.....do we need to let car off for that same period?
You check auto trans running........
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Old 03-31-2002, 02:00 PM
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Ali - I believe you are correct. For the 117, V8 engine, refer MBNA 00/57A dated November 1995. I states that it is best to check the engine oil level with it at or near it's correct operating temperature of 80 and let it stand for 10 minutes to drain back to the sump. The correct level should be between the min and max mark. These engines certainly do not like being overfilled
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