Posted by DDD [99.7.228.105] on Thursday, September 24, 2015 at 07:15:02 :
OK... So last night, worked with the engine a little more.
Now that its been running more, its sounding better and better.. I replaced the plugs to remove any oil fouled units to get a uniform firing on all cylinders.
the motor runs great. NO smoke during normal idle.. no smoke during exceleration, BUT
as soon as I let off the gas, I get blue smoke.
what would tht indicate? worn oil control rings? Valve guides? I was under the impression that flat heads, having guides in the block, and under the combustion port made little difference in oil control.
maybe I am wrong.. maybe this is part of the problem? I didnt address the guides when I did the valve replacement last week.. dojt have those tools. besuides, I think they get pressed in from the underside?
anyway, I am getting better than 90 lbs across the cylinders on compression... engine sounds good and smooth actually.. its just that blue smoke when letting off the gas.
I really dont think its getting better, either...its a pretty good plume when I let of the gas...ugh
So, where to look next?
the valve guides?
or the pistons/rings?
I am thinking I need to pull the engine and get the help from an engine builder at this time. but would like to see if I can at least point him to the problem area...
removing the pistons, and replacing rings and mains in the truck myself, and under the working conditions I have (outside, under a tree in a dirt drivewway!!) isnt the best way to rebuild things!
What do you all think the area of concern is?
guides? oil control rings causing oil smoke at deceleration?
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