WHAT IS BLOW BY?
#3
Re: WHAT IS BLOW BY?
my 97 accord stock has no blow by 130,000 miles but my turbo civic 140000 miles with motor swap at 100000 has a few squirts of oil from the oil cap when removed. The only smoke is from the muffler and i believe it is from being rich my af gauge is all the way in the rich zone, and the blackish gray vapor from the exhaust has condensation and makes your eyes burn...so is this type of blow back ok?Im running 5 psi,450cc dsms,uberdata
#7
Re: WHAT IS BLOW BY?
blow by is when the pressure in the crank case blows up past the rings and causes oil to enter the combustion chamber (by passing through bad rings or cracked ring lands) and then the the smoke passes through the valves and come out the valve cover breather and exhaust. yes, if your car is running and you remove your oil cap, it is normal to have a little smoke (most heat and condensation) come out, as well as a little oil flinging around and air pulsing out, you have a cam or two in there moving at least 1200 or so rpm's at idle, don't expect everything around it (oil and air) to sit still as well
#9
Re: WHAT IS BLOW BY?
Originally Posted by projekteg
blow by is when the pressure in the crank case blows up past the rings and causes oil to enter the combustion chamber (by passing through bad rings or cracked ring lands) and then the the smoke passes through the valves and come out the valve cover breather and exhaust. yes, if your car is running and you remove your oil cap, it is normal to have a little smoke (most heat and condensation) come out, as well as a little oil flinging around and air pulsing out, you have a cam or two in there moving at least 1200 or so rpm's at idle, don't expect everything around it (oil and air) to sit still as well
Good explanation!
JP
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