Loud engine (valve) rattle and coolant leak after cylinder head installation
Hi there,
Just finished with the cylinder head job (2000 Saab 9-5 Aero B235R), did it for multiple reasons: exhaust manifold studs were broken off, coolant leakage, crankcase vent not working, and just the interest to see what's inside. Started up the car and: engine works with a bit higher than usual revs (I didn't check the tacho sadly) and quite loud engine noise (valve rattle?).
When doing the head job I disassembled all 16 hydraulic tappets and cleaned them thoroughly. When reassembling I didn't bleed them rock solid but left in the sponginess (didn't fill max with oil). So I would guess this could not be the problem? Timing I checked multiple times and all the marks were where they were supposed to be, so it can not be this also? Could it be oil pressure is not building up so no adequate lubrication for the camshaft area?
Second thing is a coolant leak. I see white smoke coming near turbo and exhaust manifold, also a noticeable amount of coolant just below the cylinder head coolant hoses / thermostat cover on the automatic tranny. Also small leak from the radiator. Before installing the head I inspected the hoses and found no cracks nor defects so I just reused the old ones. Could this be indication of bad coolant bypass valve? Or just bad hoses?
Any ideas?
Thanks,
Shimmy