Quote:
Originally Posted by Lugnutz65
Here’s a quick video of my leak down test. CYLINDER 5 VIDEO LINK
I pressurized the cylinders again tonight and HEARD AND FELT air at the OIL FILL HOLE and INTAKE THROTTLE BODY. If I also have leaking intake valves, then the cylinder leak down test numbers will be falsely lowered.
The plan for the weekend is to run the engine for a while and test it again when warm. I want accurate info before I ask the engine builder to remedy the problems.
Here are the leak down numbers I got last night.
The engine was COLD when I tested. It was too late to warm the engine up, because I already had the valve cover off. I have some serious problems.
#1 = 91
#2 = 76
#3 = 94
#4 = 96
#5 = 62
#6 = 61
#7 = 91
#8 = 71 |
Now you have your reason now for so much blow by....
2,5,6,and 8 are critical failure readings....hearing air in the oil filler means ring blow by...most likely broken or missing rings.....
1 and 7 are indicative the rings have not sealed to the cylinder walls.
3 and 4 are the only two close to ok...
BTW...I believe anything less than 95 is a fail....
Hearing air in the intake manifold is most likely poorly seating or burnt valves or a bad vacuum leak at base of manifold....pulling blowby air from sump into manifold.
Suggest you do not pull the engine down without discussing this with the seller....
I remember noting the absence of Rings on the parts replaced list on the Ad post...suspect they were not replaced and old ones were installed....
