Question about compression test results
#1
Question about compression test results
Hello all, I just finished my compression test and was wonder if these numbers sound about right? These are on a 96 GT with 143K miles. Also I was wondering if they are within specs? One more question. I'm replacing the valve stem seals because they are leaking oil and is burning on start up and at idle. The car is stock and don't need to mod it, so can I just use the less expensive Fel-pro seals or do I need to get oem ones from Ford?
#1-175 #5-180
#2-180 #6-180
#3-175 #7-180
#4-175 #8-180
Thanks Rob.
#1-175 #5-180
#2-180 #6-180
#3-175 #7-180
#4-175 #8-180
Thanks Rob.
#3
They look good, did you remove all the plugs, and block the throttle plate open, when you did the test?
That's the prescribed procedure and will provide the most consistent numbers from test to test as it provides the best airflow, and removes much of the battery's state of charge from the picture...
That's the prescribed procedure and will provide the most consistent numbers from test to test as it provides the best airflow, and removes much of the battery's state of charge from the picture...
#7
Hey guy's thanks for the quick response. No I didn't block the tb open I just pressed the gas pedal down all the way. Will that change the numbers? Should I do it again? I pulled all the plugs, disconnected both coil connectors and pulled the fuel relay.
No I'm not going to pull the heads to replace the valve stem seals. I'm going to use the TrickFlow valve spring tool and use air to hold up the valves and plug all the oil passages so nothing falls in. Could someone let me know about the seals themselves?
No I'm not going to pull the heads to replace the valve stem seals. I'm going to use the TrickFlow valve spring tool and use air to hold up the valves and plug all the oil passages so nothing falls in. Could someone let me know about the seals themselves?
#8
No I'm not going to pull the heads to replace the valve stem seals. I'm going to use the TrickFlow valve spring tool and use air to hold up the valves and plug all the oil passages so nothing falls in. Could someone let me know about the seals themselves?
#10
If not using air then the piston needs to be at TDC, that way the valve can only drop 1/4" or so before hitting the piston--this can make getting the retainer keys out a bit more difficult...