flathead issues

C

cosmo

Junior Member
Blew the head gasket #4 on my 8BA engine with aluminum heads. Had antifreeze pouring out the exhaust. Replaced head gasket using copper, Used thread sealent on bolt threads retorqed to 50# all acrording to the book. Engine runs great now but when it comes down to idle alittle white exhaust starts coming out the tailpipe. I don't notice it when driving down the road, only at idle. Any ideas? Thanks, Dave
 
Warped head? Cracked block? Wavy deck on the block? Would have to do some accurate measuring / checking to tell for sure.. Good luck.
 
As Henry stated, if you didn't check the heads, block mating surface or inspect for cracks, it will be very difficult to determine what the issue might be now.
 
You could have a coolant pool in your muffler that needs to be cooked off with a long drive.

Lonnie
 
Could benormal exhaust condensation. As someone said, try retorquing and then run for a while to see if you're losing coolant.
 
I went through the 3 torque cycles trying to do everything right. Exhaust was full of antifreeze. Engine is cooling great, level in radiator is not dropping, oil is clean. Just seems not right to do this in idle. Will get out this weekend and drive. Thanks!!
 
No, you didn't open a can of worms. In many of the poorer countries in the world where you have to "make do" this is the way it's done.
 
Cracks in the exhaust valve bowls can be slow seepers. The center deck area it right above the siamese exhaust port and can crack in the center bolt bore area down into the port causing a slow seeper.

If the head gasket is holding its mud then a person might try some Bars leaks but the stuff can also plug up things you don't want plugged at times. If your radiator is old and partially crudded up, the sealers can finish off the plug.
 
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