2young2slow
Jan 11th, 04, 10:12 PM
First off the motor was just reringed WITHOUT HONING because it only had 100 miles on it from the previous rebuild (i didnt do it), is that a mistake?? It smoked blue after reringing but is that because the rings are not seated?
After putting it together the compression was 110 with popping through the exhuast. SO i took the heads off and the intake valves leak. Fixed that problem and now i wanna know should my compression go up to 150 or so now that i got the valves seated. I would like to do it right for the last time.
Thanks for the help in advance
wayner
Jan 12th, 04, 4:35 PM
cranking compression, or lack of it can be greatly affected by the cam you are running.
2young2slow
Jan 12th, 04, 4:39 PM
i was running a mild cam that could of effected compression but now since i got it apart i got a stock cam in it. Do you think since it smoked blue i would need to redo the bottom end?? IT was not honed on the second rebuild.
1966_L78
Jan 12th, 04, 5:02 PM
After putting it together the compression was 110 with popping through the exhuast. SO i took the
heads off and the intake valves leak. Fixed that problem and now i wanna know should my compression
go up to 150 or so now that i got the valves seated.If you had popping through the exhaust, it shouldn't have anything to do with leaking intake valves... So you probably didn't fix that problem... Although maybe you did fix it but didn't know it (maybe the pushrods adjusted too tight, or?)...
I have never heard a car "pop" through the exhaust when doing a compression test, only when they are running, but you can't do the compression test when running...
As for the low compression reading, it not only will depend on the cam, and how its insatalled (advanced, straight-up,etc), but also the static compression ratio, the ring and valve sealing condition, the battery (should be fully charged and spinning the motor fairly fast when testing), and also the carburetor should be propped open when doing the testing to allow airflow into the engine... Maybe even the gage is faulty...
I am assuming all cylinders came up approximately equal (at 110)...
Not re-honing could be a problem, even with only 100 miles (how sure of this mileage are you?).
Blue smoke could likely be a problem because of the lack of honing, and now would be the time to remedie that (before the time and money is spent trying to get it to run again...).
As for whether the compression will increase from 110 to 150, that can't be said. While 110 is low, and 150 would be better, it is kind of errelivant... Checking with a gage really requires a good baseline to compare with, and the entire combo will affect the baseline... Now if 1 cylinder is rerading 110 and the others are reading 150, then you have problems...
2young2slow
Jan 14th, 04, 8:59 PM
I know for sure the guage is good. It was only popping through exhaust when running.
When the motor was cold it shaked really bad and popped a lot more but when it warmed up a minute it ran better but nowhere near running good.
I am sick and tired of this engine.
BigBlock Ed
Jan 16th, 04, 5:47 PM
2 things are possible- did you stagger the ring gap correctly when you installed the pistons, and did you ajust the valves right? both can cause smoking. running like crap sounds like timing chain not installed right or valves not ajusted.