2007年9月9日 · Do a compression test both cold and warm then average the results. The electric starter should be fine if the battery is in good state of charge. Crank it over for no longer than 10 seconds with the throttle held wide open and the spark plug wires grounded. After the first tests are completed squirt some oil down the cylinders and retest to see if reading comes up. If it does on a warm motor ...

2015年12月4日 · A compression test on a Cummins is not easy because the injectors have to be removed. Removing the injectors is a time consuming process. If you have the injectors out already you do have to reassemble the valve rockers and set the lash before you can run the compression test. Why are you swapping the injectors? You mention slight blowby..

2014年10月9日 · I searched, and I see references to compression tests, but I can't seem to find the necessary process and listing of what tools (specialty or not) are needed? I even tried U Tube, to no avail. I am buying a 2000 CTD 5.9 that has reports of two dead cylinders, but no further details. I am trying to ready myself for diagnosis.

2009年10月26日 · Using a compression tester, do a normal compression test. Next, add some oil to the cylinder and do another compression test. If the second test reads higher that the first test, there is some blowby going on. The oil acts as a seal around the rings and helps improve compression. Another way to check it is with a leakdown compression tester.

2020年11月23日 · Hi there I would like to test the compression on my 3b engine. It has 306.500 km on it. It fires up and runs really nice, though, although it has quite significant blow-by, think. (I however lack any comparison and experience to really tell). …

2008年2月14日 · i posted - 12v w/300k i am looking to buy. figure i should do a compression test. i have a set from harbor frieght. i will look for blow by. if possible, i'd like to do a compression test to be safe. i guess also listen for any type of bearing knock. biggest concern i'd have on this truck is the engine bottom end. top end and transmission are relatively "affordable". engine bottom end …

2009年4月23日 · Like I said no pay no test.When did a compression test on a Dodge diesel ever tell you something you did not already know?????

2017年9月23日 · How do you do a compression test on a 2H? FSM doesn't say anything about cutting fuel. When I don't do anything with the fuel I get a lot o fuel mist coming out of the glow plug holes. The gauge I have does not appear to work right, first it does not hold the "hits" of pressure, then it only...

2009年3月8日 · If you decide to do a compression test, the manual states a minimum crank speed of 250rpm. 350psi for a new rebuild and 300psi for a 'used' engine. Max variance between any of the cylinders is a whopping 100psi. They dont publish a 'junk' pressure as their are really too many variables for compression testing to be that accurate.

2009年10月27日 · A good compression test that is done by a trained technician will cost around $1000.00. The reason is you need to remove all 6 injectors and reinstall them using new gaskets.