Thread: White smoke from breather and oil drops formed

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So you have breathers on both valve covers??


What head gaskets did you use??


Where is the PCV plumbed into the system??


To help try getting rings to seat you can lightly sprinkle BonAmi powder into the air horn on the carb while revving the motor --will help with the seating of the rings and valves-------


You said heads were off an old vet??????? any valve work? guides/seals?? drill steam holes??


Any sleeves in block??


What type intake manifold?? good seal at front and back cylinders next to water passage in heads/manifold?


Did you get it warm/hot enough to vaporize condensation from leaky combustion??


Any pressurasation of cooling system??

Originally Posted by jerry clayton

To help try getting rings to seat you can lightly sprinkle BonAmi powder into the air horn on the carb while revving the motor --will help with the seating of the rings and valves-------

LOL, we used to use Borax back in the days! I guess that kinda dates us!!

Ok let me try and catch up here....
i am not running a thermostat at the moment yet it stays at a constant temp between 170 to 185
edelbrock performer intake
i just replaced all the gaskets two days ago everything is felpro
There are no sleeves in the block
the block and both heads were given to the machine shop and the valve seats were redone and all checked out without any issues
the heads do have steam holes
the pcv is connected to the large outlet on the front of a edelbrock 650 thunder series carb
i do not have breathers on both valve covers, i just tried to switch the pcv and breather to see if it changed anything
the heads came off of the 305 sbc that was in the truck when i bought it.
their origional chamber size was 58 cc i believe but they have been decked. All i know about the pistons is that they are forged eagle dished pistons.
I know there are alot of issues with over boring sbc 400s and this block is 30 over. Crossing my fingers the walls are not cracked