Technical > Matt Shaff's Engine Shop
Engine Moisture
spitzerscott:
We run a 336 SBC with a 850 alky carb, after we make five or six passes and I take off the valve covers there is a large amount of moisture on the stud girdles and rocker arms and laying in the corners of the heads. Anyone have good idea as to why? We run about 180-200 degrees temp wise.
glofria:
Your not venting it enough. That moisture should be going into the catch can.
spitzerscott:
We just run a crankcase evacuation from the valve covers to the collector, is that not enough?
JrFuel Hayden:
I have no experience with alky carbs, but when I had moisture in my oil I leaned the fuel injection barrel valve. Do the plugs show heat , if not enough lean it down. I think you might be too rich.
The engine temps are in the right range, do you run water in the block, what temp do you stage you car with , I like 180° and then 200-220 at the turn off. Alky runs better with higher engine temps.
We also use a puke tank to vent the engine/crankcase/valve covers, and drain it after every run after we check valve lash every run, in our JrFueler.
Jon
glofria:
Good points Jon.
You may want to take a leakdown and see how much fuel is getting past the rings. The humidity your running in may have an affect too. But unless your milking the oil to the point of loosing viscosity, I wouldn't worry about it too much.
Navigation
[0] Message Index
[#] Next page
Go to full version