I have been testing the fummins in the yard -
The daytime air temps here have gone from about 75 to about 93 lately.... only noticed that the water temp
comes up to equilibrium a little faster..... 15 min. vs about 5 min.
I have been running so far with the cap loose because early on i saw a couple of drops of oil in the water when it was
pressurising. I intend to do a head gasket re-torque after I had heat soaked it some (thats comming up soon when i do my
first on-road test drives) I put in A-1 head studs so im thinking retorques should be fine. (only back up to 115 ft-lbs which
was the nominal torque) I didnt want to risk pushing any water across the gasket untill it was fully compressed and heat cycled and retorqued.
I am wondering if it would be OK to run un-pressurised either for a little while or even for ever----- assuming I have lots of
"headroom" on mys radiators cooling capacity vs. engine heat production. (no plans to tow anything)
So far arround the yard - just barely getting into 3-rd gear ---seems like the 12 valve is capable of slinging the 8000 lb truck
around like a wet rag in an airplane prop-
Feels like i could go through all the gears and never get over 1000 rpm. i expect it will be even more so once I can get it on smooth pavement....
Put 235-85-16 coopers on factory steel wheels to help gas mileage (maybe) - cant wait to see what MPG looks like.....
Anyway- any thoughts on the water pressure question ? I should think it would be easier on the hoses if nothing else ....
Tim