mtb_tuli
Active Member
ok, after the top end rebuilt everything ready this afternoon. Static ignition timing to TDC, new Hüco fuel pump (very quiet !) fills the carbs. Choke, starting and after 3 or 4 secs kawoum, perfect running. Oil pressure goes up to nearly end of scale. Running in the cam at 2000 rpm. So far so good, but after 10-15 minutes temperature goes close to red zone (electric fan running correctly). Stop engine, check visually, every thing dry except (...) inlet manifold (rear side of rh side) blows out water. I was alone, so checked water level, filled up some water, everything was "blubbing" but all hoses hot (thermostat with hole at the top...). Start again, running fine, but temperature again rising and oil pressure hot dropping to 20 psi at 1500 rpm. Now smoke from the heater box. Ok, stopping again and found heater matrix blown. Have a 15lbs radiator cap, this should be ok. At low revs heard some bad (knocking) noise for 1 sec. There must be very high pressure on the water system, even the thermostat housing gasket shows some bubbles when hot. Ok, need a new valley gasket (used a tin one) and will bypass the heater.
Damn.....
Damn.....