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Peter D · 08-23-04, 03:17 AM

For what its worth - there are a few guys running the DC&O 8-stack who have adopted the "belts & braces" approach, and report nice cool running & no bleeding problems :

- the stock DC&O manifold has no water ports at the back, but most owners drill & tap one into each side - right where the water ports are in the heads. These are often tee'd together, then run up to either a spigot on the thermo housing, or into the expansion tank.

- another line is taken from the front water port to one of the above spots.

- a small-bore hose is run from the top of the radiator to the expansion tank.

I think that I will run with Bill's idea of a tap at the top/front of the manifold (the highest spot on a DC&O) & also add taps at the top of the radiator & the highest point in the heater piping. I seem to remember from a previous thread that nearly everyone had bleeding problems, but once it was done prpoerly, there were no more hassles until it came time to change the coolant. Bill's little taps would make bleeding a no-brainer - so much better than 10 shots at bleeding, with coolant all over the place !

Kind Regards,

Peter D.

08-23-04, 03:17 AM	#9 (permalink)
Peter D delaneyp Peter D Join Date: Sep 2001 Location: Sydney, Australia GT40: DRB #27 Posts: 1,253 Rep Power: 21	Re: Cooling system tweak For what its worth - there are a few guys running the DC&O 8-stack who have adopted the "belts & braces" approach, and report nice cool running & no bleeding problems : - the stock DC&O manifold has no water ports at the back, but most owners drill & tap one into each side - right where the water ports are in the heads. These are often tee'd together, then run up to either a spigot on the thermo housing, or into the expansion tank. - another line is taken from the front water port to one of the above spots. - a small-bore hose is run from the top of the radiator to the expansion tank. I think that I will run with Bill's idea of a tap at the top/front of the manifold (the highest spot on a DC&O) & also add taps at the top of the radiator & the highest point in the heater piping. I seem to remember from a previous thread that nearly everyone had bleeding problems, but once it was done prpoerly, there were no more hassles until it came time to change the coolant. Bill's little taps would make bleeding a no-brainer - so much better than 10 shots at bleeding, with coolant all over the place ! Kind Regards, Peter D.