Just keep them in the same holes... 
Engine Builders - Hone the Block after 6 hours
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TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
Engine Builders - Hone the Block after 6 hours Do I need to hone the cylinders or put new rings in after 6 hours? I am pulling out my motor to tighten up the main bearings. I have about 5 or 6 hours on it since it was built. Most of that has been runs through the country with the scanner on, and one race weekend at the track. I was planning to just re-use the pistons and rings as is, but I just pulled off the throttal body and noticed a lot of oil in the intake from the PCV system. Is that normal, do I have excess blow by? I have not noticed any smoke or oil consumption. Maybe I will do a leak down test. If it is good, can I re-use the rings without a hone job? 
Thread Starter
TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
4% - 6% leak down. 4 on some as much as 6 on others. Wow, that does not really sound good, my LS1 that I am selling with 18K had 2%. I'm calling my motor builder tomorrow to see if we need new rings. Maybe these didn't seat properly, what's up with that? Will they get better with time???
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Thread Starter
TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
My motor guy said to try to determine if the leak is coming from the cylinder, or the valves. I'm going to pressure it again when I get the intake off and listen to the intake and exhaust ports. If the valve grind is leaking, I will re-grind the valves. Sounds like you guys are OK with the rings. This test was with a cold motor, the ring gap would probably decrease and seal up better if it was warmed up.
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