GT1 compression test ?

[champaign777]

I am wandering if GT1 can do a compression test
if not some life data which can give you an idea about you compression ?

[randomy]

Uhm no. You have to have compression gauge in place of the spark plugs to measure compression. No software can do this.

[champaign777]

life data ?

[David Mc]

No, to read compression test results on a computer you would need strain gauges fitted inside the cylinder head on each cylinder. This test is a mechanical condition test and can only be performed using a compression gauge. Live data tells you things like ignition timing, rpm, fuel trim and displays sensor values.

[stanley]

When BMW had the cylinder wall problem with the V8s, there was a electical way with DIS to check ( compression) by hooking up leads to engine and a AMP clamp to the starter, by evaluating current draw on a scale it would show you which cyls. had bad compression. I think thats what he is talking about.

[champaign777]

and link to this matter related to GT1 ?

[stanley]

Do not think you have ness. lead and programs. This goes back to 1994 or 5. I will see if I can locate the SB.

Here is part of SB. See pressure dist.
Notes (javascript:notesWindow('http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OF34~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420'))GROUP 11
Engine
Bulletin Number
11 11 95 (4305)
Woodcliff Lake, NJ
October 1995
Product Engineering
The DME EPROM programming update Service Action outlined in Service Information bulletins 12 06 95 (4258) and 12 09 94 (4132) must be performed on all affected M60 powered vehicles. The DME programming update will not affect a vehicle's idle quality. However, it will prevent degradation of idle quality caused by chemical reaction of high sulfur content fuels with the cylinder wall material.
SUBJECT:
M60 Engine Diagnosis
MODELS:
All with M60 Engines
Complaints:
1)Excessively uneven idle or
2)Customer requests assurance that his/her M60 engine is operating within BMW specifications.
Note : A certain fluctuation in idle speed (http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OD~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/58948512) is a normal and inherent design characteristic of the M60 engine as this engine is designed for maximum power output and optimal throttle response while still providing smooth running characteristics. The M60 Engine Test should be performed strictly based on the above mentioned customer complaints of excessively uneven idle or when it is evident that without this test the customer would loss confidence in his BMW. Consequently, the test will only be carried out in a very limited number of cases.
Correction:
A procedure has been developed to diagnose the condition of M60 engines using the BMW DIS tester and is included as of DIS software version 5.0 (see Service Information bulletin 11 12 95 (4307) for further instructions on accessing the M60 Engine Test in DIS). The M60 Engine Test was developed and verified in the field using customer cars with the cooperation of more than 10 BMW dealerships in different parts of this country.
The M60 Engine Test internal thresholds for the "Idle Quality and Pressure Distribution" were correlated exclusively for the M60 engine. The M60 Engine Test should never be performed on any other engine other than the M60 as the results would be false and inconclusive. These internal thresholds are used by the DIS for calculation purposes and cannot be compared with conventional workshop testing equipment. Special tools which include a Snap-On(R) Cylinder Leakdown Tester (tool number 88 88 0 000 118) and a Compression Stroke Indicator (tool number 88 88 0 000 117) will be sent to all dealers via the Automatic Tool Shipment program. See Service Information 04 22 95 (4299). These tools must be used any time a cylinder leakdown test is requested by the DIS Tester when performing the M60 Engine Test. This assures uniform cylinder leakage readings from one technician to the next and avoids possible incorrect readings due to equipment variations.
A video titled "M60 Engine Diagnosis" is also available which further highlights the M60 engine diagnosis procedures.
If the DME EPROM programming update has not yet been performed it should be done at the end of the M60 Engine Test. This will prevent possible incorrect idle quality readings due to a DME which has not yet adapted to the engine.
The M60 Engine Diagnosis Test consist of the following sections:
^DME fault memory check
^Electronically evaluating the idle quality; i.e., even engine rotation
^Electronically measuring cylinder pressure differences; i.e., pressure distribution.
^Measuring piston ring/cylinder wall sealing; i.e., cylinder leakdown, it needed.
The cylinder leakdown section is only selected by the DIS Tester if the results from the Idle Quality and the Pressure Distribution Test are inconclusive; in other words, if either test fails and the other one passes the present thresholds. The DIS tester gives instructions for the various test steps and requires input of information/test results from the technician using an interactive display screen. The test instructions are located in the "diagnosis test information" displays an the measurements are performed using the "test system" section as indicated.
When all test have been performed and the required information has been input by the technician, the DIS tester will evaluate and compare the results against internally stored values and make a decision on the engine condition.
Conditions:
The following parameters must be met in order to carry out the M60 Engine Test:
^Engine mileage - at least 3,000 miles
^Engine at operating temperature - greater than 85°C (185°F)
^Battery fully charged - greater than or equal to 12.3V
Note : The M60 Engine test will be delayed automatically until the operating temperature and battery voltage specifications are met.
If the DME cannot be identified by the DIS Tester due to a previous EPROM change. the DME EPROM programming update Service Action outlined in Service Information bulletin 12 06 95 (4258) or 12 09 94 (4132). must be carried out first to continue the M60 Engine Test
Procedure:
After the individual idle quality, pressure distribution, and if needed, cylinder leakdown measurements have been performed, a screen printout must be made as indicated in the test instructions. All printouts should be kept with the repair order in the Vehicle History file.
Note : While performing the Idle Quality Test, an "Error Message - Fault Code 200" may be displayed on the DIS screen due to a glitch in the current software. If this message is displayed the "Continue" button should be selected which will resume the M60 Engine Test.
Screen printouts required when performing M60 Engine Test:
IDLE QUALITY TEST WORKSHEETS
SINCE THE INDIVIDUAL WORKSHEETS ONLY SHOW INTERMEDIATE M60 ENGINE TEST RESULTS THEY SHOULD NOT BE GIVEN TO THE CUSTOMER.
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R1H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899421
Worksheet:
Idle Quality "Measure time short" (without load)
Note :All measured values are displayed under the cylinder number in firing order (http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OD~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/58948513).
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899422
Worksheet:
Idle Quality "Measure time short" (with engine load)
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899423
Worksheet:
Idle Quality "Measure time long" (without engine load)
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899424
Worksheet:
Idle Quality "Measure time long" (with engine load)
Note The VIN number (last 7 digits) and "with engine load" or "without engine load" must be handwritten on each worksheet printout for future reference. They should be filed in the Vehicle History file.
If the Idle Quality Test results (measure time short, without and with engine load) are above the stored nominal values in the tester, the test program automatically bypasses the Idle Quality Test (measure time long, without and with engine load) and continues the M60 Engine Test.
PRESSURE DISTRIBUTION TEST WORKSHEET
SINCE THE INDIVIDUAL WORKSHEETS ONLY SHOW INTERMEDIATE M60 ENGINE TEST RESULTS, THEY SHOULD NOT BE GIVEN TO THE CUSTOMER.
The last 7 digits of the VIN must be handwritten on the pressure distribution worksheet for future reference.
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899425
Note : All measured values are displayed under the cylinder number in firing order (http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OD~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/58948513).
ENGINE TEST RESULT/TEST REPORT
THESE PRINTOUTS MAY BE GIVEN TO A CUSTOMER, IF REQUESTED.
Depending on the M60 Engine Test results, the "Test Report" section in the right upper window will indicate if the test results are within or not within specifications.
The "Engine Test Result" section in the left window gives further information/instructions. Depending on the M60 Engine Test results, one of six screens (4 examples shown below) will be displayed; the characteristic differences of these displays are:
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P4R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899426
^The engine passes both idle quality and pressure distribution specifications, no further test are required.
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P4R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899427
^The engine fails both the idle quality and pressure distribution specifications, no further testing using DIS is required at this point, but a mechanical disassembly and inspection is necessary.
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P4R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899428
^Test results will point out whether or not the leakdown test was performed based on inconclusive results from the idle quality and the pressure distribution test.
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P4R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899429
^A poor idle condition may have numerous reasons other than engine wear. Therefore, the test results will reflect if the idle quality of a given engine does not always meet BMW specifications, even though the engine is diagnosed as mechanically sound. In such cases troubleshooting should be performed if a customer complaint of "excessively uneven idle" received.
Diagnosis Report
SINCE THIS REPORT SHOWS DATA WHICH DIS NEEDS TO MAKE ITS CALCULATIONS THEY SHOULD NOT BE GIVEN TO THE CUSTOMER.
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899430
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899431
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899432
http://www.motoralldata.com/alldata/MOTOR~V104710029~C21663~R0~OB0~P3R0H~N/0/41746505/56516210/56516235/56516236/34853741/100411974/34853743/34856143/42063450/121083641/84899420/84899433
^The Diagnosis Report summarizes all of the M60 Engine test steps along with the various technician inputs. This report must be printed out at the conclusion of each M60 Engine Test and must be kept in the Vehicle History file.

[champaign777]

nice

actually i got error like - "oil sensor failure" :)

just wanted to know all related topics ...

[IcemanBHE]

Id like to read more about that. Too many red x's. What are those?

[champaign777]

he removed pictures
me too interesting but i want to know if our GT1 has something like this

[stanley]

I did not delete them, it happens all the time, after awhile the pics go away. They are of garphs of the test. I do not think the DIS version is out there anymore, as a dealer we do not have them either. Also you would need, coil adapters, cables, amp clamp, etc.

[champaign777]

I see ... its too complicated for somebody who dont really need it

[randomy]

You still have to attach the same tools to the measure the cylinder compression, DIS appears to read the data though so you don't have to know or look up the proper compression and stroke:

Special tools which include a Snap-On(R) Cylinder Leakdown Tester (tool number 88 88 0 000 118)http://buy1.snapon.com/products/diagnostics/images/gauges/EEPV309A.jpg

and a Compression Stroke Indicator (tool number 88 88 0 000 117) will be sent to all dealers ...
http://ep.yimg.com/ca/I/stylespilotshop_2098_28893080

[champaign777]

any of these tools will work for E39 ? I sow them on ebay and they are cheap